1. The document discusses experiments performed on converging and converging-diverging nozzles.
2. Converging nozzles accelerate fluid flow to supersonic speeds at the nozzle exit, while converging-diverging nozzles can accelerate fluids to both subsonic and supersonic regimes depending on pressure ratios.
3. Calculations are shown for mass flow rates through a nozzle at different pressure ratios using theoretical equations.
Performance of the four strokes diesel engineSaif al-din ali
This document describes an experiment to study the performance of a four-stroke diesel engine at various speeds. It includes the objective to analyze the effect of speed on engine parameters. The document outlines the test procedure which involves taking readings like speed, torque, temperature and fuel consumption at different water flows through the dynamometer to vary the engine speed. Calculations are shown to determine values like power, efficiency, air-fuel ratio based on the experimental readings. Results are presented in a table for one engine speed setting as an example.
Pressure distribution along convergent- divergent NozzleSaif al-din ali
SAIF ALDIN ALI MADIN
سيف الدين علي ماضي
S96aif@gmail.com
This aim of this practical was to investigate compressible flow in a
convergent-divergent nozzle. Different flow patterns that influence
the results of the investigation are also explored. The different
pressure distributions that occur at varying lengths in the nozzle
were also recorded and analyzed
Characteristics of a simply converging nozzle through which steam is passesSaif al-din ali
1. The document describes experiments conducted on converging and converging-diverging nozzles. It discusses the theory behind how these nozzles work and how properties like pressure and velocity change within the nozzles.
2. Calculations are shown for the mass flow rate through the nozzles under different pressure ratios. The critical pressure ratio where the nozzle becomes choked is also calculated.
3. Results show the mass flow rate and critical pressure ratio for two test cases of varying inlet pressures.
Water cross flow shell and tube heat exchanger | Heat Transfer LaboratorySaif al-din ali
SAIF ALDIN ALI MADIN
سيف الدين علي ماضي
S96aif@gmail.com
Experiment Name: - Water / Water Cross Flow Shell and Tube Heat
Exchanger
1. Abstract
Studying the performance of this type of heat exchanger
2. Introduction
Types of heat exchangers:
Onetype of heat exchanger is that of a double pipe arrangement with either
counter or parallel flow and with either the hot or cold fluid occupying the annular
space and the other fluid occupying the inside of the inner pipe. A type of heat
exchanger widely used in the chemical process inches is that of the shell and tube
arrangement
Pressure distribution around a circular cylinder bodies | Fluid Laboratory Saif al-din ali
SAIF ALDIN ALI MADIN
سيف الدين علي ماضي
S96aif@gmail.com
A cylinder in a closed circuit wind tunnel will be experimented upon
to gather the pressure distribution acting on it
Laminar flow is defined when a fluid flows in parallel layers, with no
disruption between the layers. In comparison to this Turbulent flow
has a much more disorganized pattern, it is characterized by
mixing of the fluid by eddies of varying size within the flow.
The Reynolds number (Re), gives the measure for laminar and
turbulent flows. Laminar flow takes place when Reynolds number
is lower than 104, and for Turbulent flow the Re must be greater
than 3Ã-105.
The pressure is measured using the manometer, and then
therefore the pressure at the tapping must be the same as the
pressure head.
The cylinder being experimented on is placed in the wind tunnel.
The pressure upstream of the cylinder is sensed by a taping on the
tunnel wall and is connected to one of the tubes.
Refrigeration air conditioning laboratory Moist Air Properties and Air-Condi...Saif al-din ali
This document describes an experiment analyzing the properties of moist air using an air conditioning laboratory unit. Measurements of dry and wet bulb temperature were taken at different sections of the unit as air passed through a humidifying and preheating section and reheating section. The experimental results demonstrated how air conditioning processes can condition air to desired levels of temperature and humidity for occupant comfort regardless of external conditions. Calculations using psychrometric charts and equations were performed to determine air properties at each section.
Deflection of curved beam |Strength of Material LaboratorySaif al-din ali
SAIF ALDIN ALI MADIN
سيف الدين علي ماضي
S96aif@gmail.com
Experiment Name:- Deflection of curved beam
2. Introduction
The deflection of a beam or bars must be often be limited in order to provide
integrity and stability of structure or machine. Plus, code restrictions often require
these members not vibrate or deflect severely in order to safely support their
intended loading.
This experiment helps us to show some kind of deflection and how to calculate the
deflection value by using Castigliano’s Theorem and make a comparison between
result of the experiment and the theory.
performance of the four strokes diesel engineSaif al-din ali
This document describes an experiment to test the performance of a four-stroke diesel engine at varying speeds. It includes sections on the objective, engine performance, test procedure, calculations, results, and discussion. The objective is to study the effect of engine speed on performance parameters. The test procedure involves varying the engine speed using a water dynamometer and recording speed, torque, temperatures, and fuel consumption. Calculations are presented for power, specific fuel consumption, air-fuel ratio, efficiencies, and heat losses. Results are reported for two engine speeds.
Performance of the four strokes diesel engineSaif al-din ali
This document describes an experiment to study the performance of a four-stroke diesel engine at various speeds. It includes the objective to analyze the effect of speed on engine parameters. The document outlines the test procedure which involves taking readings like speed, torque, temperature and fuel consumption at different water flows through the dynamometer to vary the engine speed. Calculations are shown to determine values like power, efficiency, air-fuel ratio based on the experimental readings. Results are presented in a table for one engine speed setting as an example.
Pressure distribution along convergent- divergent NozzleSaif al-din ali
SAIF ALDIN ALI MADIN
سيف الدين علي ماضي
S96aif@gmail.com
This aim of this practical was to investigate compressible flow in a
convergent-divergent nozzle. Different flow patterns that influence
the results of the investigation are also explored. The different
pressure distributions that occur at varying lengths in the nozzle
were also recorded and analyzed
Characteristics of a simply converging nozzle through which steam is passesSaif al-din ali
1. The document describes experiments conducted on converging and converging-diverging nozzles. It discusses the theory behind how these nozzles work and how properties like pressure and velocity change within the nozzles.
2. Calculations are shown for the mass flow rate through the nozzles under different pressure ratios. The critical pressure ratio where the nozzle becomes choked is also calculated.
3. Results show the mass flow rate and critical pressure ratio for two test cases of varying inlet pressures.
Water cross flow shell and tube heat exchanger | Heat Transfer LaboratorySaif al-din ali
SAIF ALDIN ALI MADIN
سيف الدين علي ماضي
S96aif@gmail.com
Experiment Name: - Water / Water Cross Flow Shell and Tube Heat
Exchanger
1. Abstract
Studying the performance of this type of heat exchanger
2. Introduction
Types of heat exchangers:
Onetype of heat exchanger is that of a double pipe arrangement with either
counter or parallel flow and with either the hot or cold fluid occupying the annular
space and the other fluid occupying the inside of the inner pipe. A type of heat
exchanger widely used in the chemical process inches is that of the shell and tube
arrangement
Pressure distribution around a circular cylinder bodies | Fluid Laboratory Saif al-din ali
SAIF ALDIN ALI MADIN
سيف الدين علي ماضي
S96aif@gmail.com
A cylinder in a closed circuit wind tunnel will be experimented upon
to gather the pressure distribution acting on it
Laminar flow is defined when a fluid flows in parallel layers, with no
disruption between the layers. In comparison to this Turbulent flow
has a much more disorganized pattern, it is characterized by
mixing of the fluid by eddies of varying size within the flow.
The Reynolds number (Re), gives the measure for laminar and
turbulent flows. Laminar flow takes place when Reynolds number
is lower than 104, and for Turbulent flow the Re must be greater
than 3Ã-105.
The pressure is measured using the manometer, and then
therefore the pressure at the tapping must be the same as the
pressure head.
The cylinder being experimented on is placed in the wind tunnel.
The pressure upstream of the cylinder is sensed by a taping on the
tunnel wall and is connected to one of the tubes.
Refrigeration air conditioning laboratory Moist Air Properties and Air-Condi...Saif al-din ali
This document describes an experiment analyzing the properties of moist air using an air conditioning laboratory unit. Measurements of dry and wet bulb temperature were taken at different sections of the unit as air passed through a humidifying and preheating section and reheating section. The experimental results demonstrated how air conditioning processes can condition air to desired levels of temperature and humidity for occupant comfort regardless of external conditions. Calculations using psychrometric charts and equations were performed to determine air properties at each section.
Deflection of curved beam |Strength of Material LaboratorySaif al-din ali
SAIF ALDIN ALI MADIN
سيف الدين علي ماضي
S96aif@gmail.com
Experiment Name:- Deflection of curved beam
2. Introduction
The deflection of a beam or bars must be often be limited in order to provide
integrity and stability of structure or machine. Plus, code restrictions often require
these members not vibrate or deflect severely in order to safely support their
intended loading.
This experiment helps us to show some kind of deflection and how to calculate the
deflection value by using Castigliano’s Theorem and make a comparison between
result of the experiment and the theory.
performance of the four strokes diesel engineSaif al-din ali
This document describes an experiment to test the performance of a four-stroke diesel engine at varying speeds. It includes sections on the objective, engine performance, test procedure, calculations, results, and discussion. The objective is to study the effect of engine speed on performance parameters. The test procedure involves varying the engine speed using a water dynamometer and recording speed, torque, temperatures, and fuel consumption. Calculations are presented for power, specific fuel consumption, air-fuel ratio, efficiencies, and heat losses. Results are reported for two engine speeds.
Evaluation of thermal performance of a typical vapor compression refrigeratio...Saif al-din ali
This document describes an experiment conducted to evaluate the thermal performance of a typical vapor compression refrigeration cycle. The objectives were to learn about the components and analyze the cycle. Readings were taken of various temperatures and pressures. Calculations were done to determine compressor work, refrigeration effect, and coefficient of performance. Questions were asked about how to increase COP, the influence of temperatures, detecting refrigerant leaks, processes in the condenser, and functions of cycle components.
Using the convergent steam nozzle type in the entranceSaif al-din ali
This document discusses using a convergent steam nozzle in the entrance region of a steam turbine. It provides background on steam turbines and how they work, describing how steam is expanded through nozzles to convert heat energy to kinetic energy. It then discusses different types of steam nozzles, focusing on convergent nozzles, and how nozzle shape affects steam velocity and pressure distribution. A numerical simulation will be performed to analyze pressure and velocity within a simple convergent nozzle design.
The document describes an experiment on flow system control using a PID controller. The objectives are to obtain the system characteristics like overshoot, rise time, settling time, period, and transport delay. It introduces PID controllers and how they work in a closed loop system using proportional, integral, and derivative modes. The apparatus section outlines the experimental setup, which uses a flow system with a square wave input and adjustable setpoint and proportional gain. Calculations are shown for analyzing the system response based on these parameters.
Pipe insulation efficiency study unit |HEAT TRANSFER LaboratorySaif al-din ali
The document describes an experiment to study the efficiency of pipe insulation. Steam is passed through four vertical pipes - three covered with different insulating materials and one uncovered. The amount of condensate collected from each pipe is measured to calculate the heat lost and determine the thermal conductivity of the insulating materials. Calculations are shown for the three insulated pipes using parameters like steam temperature and pressure, insulation thickness, and condensate mass. The thermal conductivity is found to vary with temperature for each material.
This document describes an experiment on flow system control. The objectives are to obtain the system characteristics like peak overshoot, rise time, and settling time. It introduces PID controllers and discusses their proportional, integral and derivative modes. The theory section explains the transfer function of a PID controller and the effects of the P, I, and D terms. It also describes second-order system responses. The apparatus section lists the steps to operate the flow system and record the response. Calculations are shown to determine the system response based on the controller terms.
SAIF ALDIN ALI MADIN
سيف الدين علي ماضي
S96aif@gmail.com
The fan is being run with an electric motor and then taking the
readings from the sensors associated with the processor and the
computer and drawing the ratios relative to the flow
Free heat convection |HEAT TRANSFER LaboratorySaif al-din ali
SAIF ALDIN ALI MADIN
سيف الدين علي ماضي
S96aif@gmail.com
Experiment Name: Free Heat Convection from a Horizontal Heated
Cylinder
2. Experiment Aim:
1. Calculating the free heat convection coefficient (ℎ푁퐶) for a
horizontal heated solid cylinder.
2. Find the relationship between RaNo. And NuNo. for fluid flow
around a cylinder
This document discusses fluid mechanics concepts and fluid flow measurement techniques. It begins with defining different types of fluid flows such as steady/unsteady, uniform/non-uniform, and laminar/turbulent flows. It then describes measuring techniques for pressure, including static, dynamic, and stagnation pressures. Common pressure measurement instruments like the U-tube manometer and pressure transducers are also introduced. The document concludes with discussing the boundary layer and formulas for calculating volume flow rate by measuring velocity and duct area.
forced heat convection | HEAT TRANSFER LaboratorySaif al-din ali
SAIF ALDIN ALI MADIN
سيف الدين علي ماضي
S96aif@gmail.com
Experiment Name: Forced Heat Convection
2. Experiment Aim:
1. Calculating the forced heat convection coefficient (ℎ퐹퐶) for a heated cylinder
2. Find the relations between Re N, and NuNo. for fluid flow around a cylinder
3. Introduction:
Convection; is the mode of energy transfer between a solid surface and
the adjacent liquid or gas that is in motion, and it involves the
combined effects of conduction and fluid motion, convection is divided
into two types:
Aircraft propulsion axial flow compressors off design performanceAnurak Atthasit
The document discusses axial flow compressors and their off-design performance. It covers topics such as compressor maps, surge lines, efficiency islands, best efficiency points, operating lines, surge margins, effects of inlet pressure distortion, Reynolds number, Mach number, and tip clearance on compressor performance. The conclusion summarizes that changes in total temperature, total pressure, Mach number, and density can affect compressor operation and efficiency.
Axial compressor theory - stage-by-stage approach - 28th January 2010CangTo Cheah
The document discusses the stage-by-stage sizing approach for axial compressors. This approach allows designers to calculate blade angles and estimate pressure rise, temperature rise, and frictional losses at each stage. It introduces concepts like the de Haller number to minimize losses. A case study on the RB211-24G engine axial compressors is presented, showing blade angles and performance across 7 low pressure and 6 high pressure stages.
Predicting Performance Curves of Centrifugal Pumps in the Absence of OEM DataVijay Sarathy
Chemical and Mechanical Engineers in the oil & gas industry often carry out the task of conducting technical studies to evaluate piping and pipeline systems during events such as pump trips and block valve failures that can lead to pipes cracking at the welded joints, pump impellers rotating in the reverse direction and damaged pipe supports due to excessive vibrations to name a few. Although much literature is available to mitigate such disturbances, a key set of data to conduct transient studies are pump performance curves, a plot between pump head and flow.
The present paper is aimed at applying engineering research in industrial applications for practicing engineers. It provides a methodology called from available literature from past researchers, allowing engineers to predict performance curves for a Volute Casing End Suction Single Stage Radial Pump. In the current undertaking, the pump in question is not specific to any one industry but the principles are the same for a Volute Casing End suction radial pump.
This document summarizes an experimental study on the slip factor in radial tipped centrifugal fans. It discusses that while previous studies assumed the slip factor only depends on impeller geometry, historical evidence and some experiments show it also depends on specific speed and flow rate. The objective of this study is to experimentally measure the slip factor at different locations around the impeller circumference for varying numbers of blades, and compare with theoretical correlations. An experimental setup was designed using a specially developed three-hole probe to measure local velocities. The slip factor is defined as the ratio of actual to theoretical exit whirl velocities. Theoretical velocities are calculated analytically, while actual velocities are measured experimentally for comparison.
1. The document describes an experiment to calculate the loss coefficient (K) for different pipe components, including pipe bends, branches, and changes in cross-section.
2. Tests were conducted to measure the minor losses through pipe elbows at various angles, double elbows, and a single elbow.
3. The loss coefficients were calculated based on measurements of pressure difference, flow velocity, and component geometry. Loss coefficients ranged from 0.548 to 2.345 depending on the pipe component.
The document discusses axial flow compressors. It begins with an overview that axial flow compressors have multiple stages, each with a row of rotor blades followed by a row of stator blades. The fluid is accelerated by the rotor blades and decelerated in the stator, converting kinetic to static pressure energy. Due to small pressure increases per stage, axial compressors require many stages. The document then provides details on the elementary theory, velocity triangles, degree of reaction, and three dimensional flow effects in axial compressors. It concludes with discussing the design process which includes choosing operating parameters, determining number of stages, calculating air angles, and testing.
Predicting Performance Curves of Centrifugal Pumps in the Absence of OEM DataVijay Sarathy
Chemical and Mechanical Engineers in the oil & gas industry often carry out the task of conducting technical studies to evaluate piping and pipeline systems during events such as pump trips and block valve failures that can lead to pipes cracking at the welded joints, pump impellers rotating in the reverse direction and damaged pipe supports due to excessive vibrations to name a few. Although much literature is available to mitigate such disturbances, a key set of data to conduct transient studies are pump performance curves, a plot between pump head and flow.
The present paper is aimed at applying engineering research in industrial applications for practicing engineers. It provides a methodology called from available literature from past researchers, allowing engineers to predict performance curves for a Volute Casing End Suction Single Stage Radial Pump. In the current undertaking, the pump in question is not specific to any one industry but the principles are the same for a Volute Casing End suction radial pump.
Flash Steam and Steam Condensates in Return LinesVijay Sarathy
In power plants, boiler feed water is subjected to heat thereby producing steam which acts as a motive force for a steam turbine. The steam upon doing work loses energy to form condensate and is recycled/returned back to reduce the required make up boiler feed water (BFW).
Recycling steam condensate poses its own challenges. Flash Steam is defined as steam generated from steam condensate due to a drop in pressure. When high pressure and temperature condensate passes through process elements such as steam traps or pressure reducing valves to lose pressure, the condensate flashes to form steam. Greater the drop in pressure, greater is the flash steam generated. This results in a two phase flow in the condensate return lines.
Governor apparatus | theory of machine LaboratorySaif al-din ali
SAIF ALDIN ALI MADIN
سيف الدين علي ماضي
S96aif@gmail.com
Experiment Name:- Governor Apparatus
1. Abstract
The function of a governor is to regulate the mean speed of an engine,
when there are variations in loads e.g. when load on an engine increase
or decrease, obviously its speed will, respectively decrease or increase
to the extent of variation of load. This variation of speed has to be
controlled by the governor, within small limits of mean speed. This
necessitates that when the load increase and consequently the speed
decreases, the supply of fuel to the engine has to be increase
accordingly to compensate for the loss of the speed, so as to bring back
the speed to the mean speed. Conversely, when the load decreases
and speed increases, the supply of fuel has to be reduced
Axial compressor theory - stage-wise isentropic efficiency - 18th March 2010CangTo Cheah
This document discusses the theory of stage-wise isentropic efficiency in axial compressors. It covers determining the pitch and chord between blades, calculating the number of blades based on pitch, and formulas for static pressure rise and forces acting on cascades, including lift and drag forces. Graphs are presented for mean deflection and stagnation pressure loss as functions of incidence angle. The document aims to calculate coefficients for drag, lift, and loss based on these graphs and the presented formulas.
simple pendulum and compound pendulum | vaibration | u.o.b | Saif al-din ali
saif aldin ali madi
سيف الدين علي ماضي
s96aif@gmail.com
In this laboratory practice the simulation of a simple pendulum was
carried out with the objective of determining the acceleration of gravity
and its uncertainty, through the data obtained in the simulation. In this
one was made the assembly of a simple pendulum through a rope, a
weight, a grader and the base for pendulums, which allowed us to
obtain through the following instruments rule and timer, data as the time
in which 20 oscillations are completed and the length of the pendulum,
taking into account the uncertainties of each instrument, these data
were organized into tables and then used in the realization of graphs
expressing the time as a function of the length of the pendulum, in
addition to calculating the acceleration of gravity and its uncertainty.
CFD Analysis of Symmetrical Tangential Inlet Cyclone SeparatorIRJET Journal
This document discusses a computational fluid dynamics (CFD) analysis of a symmetrical tangential inlet cyclone separator compared to a classical cyclone separator. The CFD analysis is conducted using ANSYS to simulate gas-particle flow through the separators. The results show that modifying the cyclone geometry by adding a symmetrical tangential inlet improves the cyclone's performance by increasing the tangential velocity within the separator compared to the classical single inlet design. Specifically, static pressure was found to be more uniform throughout the body of the symmetrical inlet cyclone separator.
Evaluation of thermal performance of a typical vapor compression refrigeratio...Saif al-din ali
This document describes an experiment conducted to evaluate the thermal performance of a typical vapor compression refrigeration cycle. The objectives were to learn about the components and analyze the cycle. Readings were taken of various temperatures and pressures. Calculations were done to determine compressor work, refrigeration effect, and coefficient of performance. Questions were asked about how to increase COP, the influence of temperatures, detecting refrigerant leaks, processes in the condenser, and functions of cycle components.
Using the convergent steam nozzle type in the entranceSaif al-din ali
This document discusses using a convergent steam nozzle in the entrance region of a steam turbine. It provides background on steam turbines and how they work, describing how steam is expanded through nozzles to convert heat energy to kinetic energy. It then discusses different types of steam nozzles, focusing on convergent nozzles, and how nozzle shape affects steam velocity and pressure distribution. A numerical simulation will be performed to analyze pressure and velocity within a simple convergent nozzle design.
The document describes an experiment on flow system control using a PID controller. The objectives are to obtain the system characteristics like overshoot, rise time, settling time, period, and transport delay. It introduces PID controllers and how they work in a closed loop system using proportional, integral, and derivative modes. The apparatus section outlines the experimental setup, which uses a flow system with a square wave input and adjustable setpoint and proportional gain. Calculations are shown for analyzing the system response based on these parameters.
Pipe insulation efficiency study unit |HEAT TRANSFER LaboratorySaif al-din ali
The document describes an experiment to study the efficiency of pipe insulation. Steam is passed through four vertical pipes - three covered with different insulating materials and one uncovered. The amount of condensate collected from each pipe is measured to calculate the heat lost and determine the thermal conductivity of the insulating materials. Calculations are shown for the three insulated pipes using parameters like steam temperature and pressure, insulation thickness, and condensate mass. The thermal conductivity is found to vary with temperature for each material.
This document describes an experiment on flow system control. The objectives are to obtain the system characteristics like peak overshoot, rise time, and settling time. It introduces PID controllers and discusses their proportional, integral and derivative modes. The theory section explains the transfer function of a PID controller and the effects of the P, I, and D terms. It also describes second-order system responses. The apparatus section lists the steps to operate the flow system and record the response. Calculations are shown to determine the system response based on the controller terms.
SAIF ALDIN ALI MADIN
سيف الدين علي ماضي
S96aif@gmail.com
The fan is being run with an electric motor and then taking the
readings from the sensors associated with the processor and the
computer and drawing the ratios relative to the flow
Free heat convection |HEAT TRANSFER LaboratorySaif al-din ali
SAIF ALDIN ALI MADIN
سيف الدين علي ماضي
S96aif@gmail.com
Experiment Name: Free Heat Convection from a Horizontal Heated
Cylinder
2. Experiment Aim:
1. Calculating the free heat convection coefficient (ℎ푁퐶) for a
horizontal heated solid cylinder.
2. Find the relationship between RaNo. And NuNo. for fluid flow
around a cylinder
This document discusses fluid mechanics concepts and fluid flow measurement techniques. It begins with defining different types of fluid flows such as steady/unsteady, uniform/non-uniform, and laminar/turbulent flows. It then describes measuring techniques for pressure, including static, dynamic, and stagnation pressures. Common pressure measurement instruments like the U-tube manometer and pressure transducers are also introduced. The document concludes with discussing the boundary layer and formulas for calculating volume flow rate by measuring velocity and duct area.
forced heat convection | HEAT TRANSFER LaboratorySaif al-din ali
SAIF ALDIN ALI MADIN
سيف الدين علي ماضي
S96aif@gmail.com
Experiment Name: Forced Heat Convection
2. Experiment Aim:
1. Calculating the forced heat convection coefficient (ℎ퐹퐶) for a heated cylinder
2. Find the relations between Re N, and NuNo. for fluid flow around a cylinder
3. Introduction:
Convection; is the mode of energy transfer between a solid surface and
the adjacent liquid or gas that is in motion, and it involves the
combined effects of conduction and fluid motion, convection is divided
into two types:
Aircraft propulsion axial flow compressors off design performanceAnurak Atthasit
The document discusses axial flow compressors and their off-design performance. It covers topics such as compressor maps, surge lines, efficiency islands, best efficiency points, operating lines, surge margins, effects of inlet pressure distortion, Reynolds number, Mach number, and tip clearance on compressor performance. The conclusion summarizes that changes in total temperature, total pressure, Mach number, and density can affect compressor operation and efficiency.
Axial compressor theory - stage-by-stage approach - 28th January 2010CangTo Cheah
The document discusses the stage-by-stage sizing approach for axial compressors. This approach allows designers to calculate blade angles and estimate pressure rise, temperature rise, and frictional losses at each stage. It introduces concepts like the de Haller number to minimize losses. A case study on the RB211-24G engine axial compressors is presented, showing blade angles and performance across 7 low pressure and 6 high pressure stages.
Predicting Performance Curves of Centrifugal Pumps in the Absence of OEM DataVijay Sarathy
Chemical and Mechanical Engineers in the oil & gas industry often carry out the task of conducting technical studies to evaluate piping and pipeline systems during events such as pump trips and block valve failures that can lead to pipes cracking at the welded joints, pump impellers rotating in the reverse direction and damaged pipe supports due to excessive vibrations to name a few. Although much literature is available to mitigate such disturbances, a key set of data to conduct transient studies are pump performance curves, a plot between pump head and flow.
The present paper is aimed at applying engineering research in industrial applications for practicing engineers. It provides a methodology called from available literature from past researchers, allowing engineers to predict performance curves for a Volute Casing End Suction Single Stage Radial Pump. In the current undertaking, the pump in question is not specific to any one industry but the principles are the same for a Volute Casing End suction radial pump.
This document summarizes an experimental study on the slip factor in radial tipped centrifugal fans. It discusses that while previous studies assumed the slip factor only depends on impeller geometry, historical evidence and some experiments show it also depends on specific speed and flow rate. The objective of this study is to experimentally measure the slip factor at different locations around the impeller circumference for varying numbers of blades, and compare with theoretical correlations. An experimental setup was designed using a specially developed three-hole probe to measure local velocities. The slip factor is defined as the ratio of actual to theoretical exit whirl velocities. Theoretical velocities are calculated analytically, while actual velocities are measured experimentally for comparison.
1. The document describes an experiment to calculate the loss coefficient (K) for different pipe components, including pipe bends, branches, and changes in cross-section.
2. Tests were conducted to measure the minor losses through pipe elbows at various angles, double elbows, and a single elbow.
3. The loss coefficients were calculated based on measurements of pressure difference, flow velocity, and component geometry. Loss coefficients ranged from 0.548 to 2.345 depending on the pipe component.
The document discusses axial flow compressors. It begins with an overview that axial flow compressors have multiple stages, each with a row of rotor blades followed by a row of stator blades. The fluid is accelerated by the rotor blades and decelerated in the stator, converting kinetic to static pressure energy. Due to small pressure increases per stage, axial compressors require many stages. The document then provides details on the elementary theory, velocity triangles, degree of reaction, and three dimensional flow effects in axial compressors. It concludes with discussing the design process which includes choosing operating parameters, determining number of stages, calculating air angles, and testing.
Predicting Performance Curves of Centrifugal Pumps in the Absence of OEM DataVijay Sarathy
Chemical and Mechanical Engineers in the oil & gas industry often carry out the task of conducting technical studies to evaluate piping and pipeline systems during events such as pump trips and block valve failures that can lead to pipes cracking at the welded joints, pump impellers rotating in the reverse direction and damaged pipe supports due to excessive vibrations to name a few. Although much literature is available to mitigate such disturbances, a key set of data to conduct transient studies are pump performance curves, a plot between pump head and flow.
The present paper is aimed at applying engineering research in industrial applications for practicing engineers. It provides a methodology called from available literature from past researchers, allowing engineers to predict performance curves for a Volute Casing End Suction Single Stage Radial Pump. In the current undertaking, the pump in question is not specific to any one industry but the principles are the same for a Volute Casing End suction radial pump.
Flash Steam and Steam Condensates in Return LinesVijay Sarathy
In power plants, boiler feed water is subjected to heat thereby producing steam which acts as a motive force for a steam turbine. The steam upon doing work loses energy to form condensate and is recycled/returned back to reduce the required make up boiler feed water (BFW).
Recycling steam condensate poses its own challenges. Flash Steam is defined as steam generated from steam condensate due to a drop in pressure. When high pressure and temperature condensate passes through process elements such as steam traps or pressure reducing valves to lose pressure, the condensate flashes to form steam. Greater the drop in pressure, greater is the flash steam generated. This results in a two phase flow in the condensate return lines.
Governor apparatus | theory of machine LaboratorySaif al-din ali
SAIF ALDIN ALI MADIN
سيف الدين علي ماضي
S96aif@gmail.com
Experiment Name:- Governor Apparatus
1. Abstract
The function of a governor is to regulate the mean speed of an engine,
when there are variations in loads e.g. when load on an engine increase
or decrease, obviously its speed will, respectively decrease or increase
to the extent of variation of load. This variation of speed has to be
controlled by the governor, within small limits of mean speed. This
necessitates that when the load increase and consequently the speed
decreases, the supply of fuel to the engine has to be increase
accordingly to compensate for the loss of the speed, so as to bring back
the speed to the mean speed. Conversely, when the load decreases
and speed increases, the supply of fuel has to be reduced
Axial compressor theory - stage-wise isentropic efficiency - 18th March 2010CangTo Cheah
This document discusses the theory of stage-wise isentropic efficiency in axial compressors. It covers determining the pitch and chord between blades, calculating the number of blades based on pitch, and formulas for static pressure rise and forces acting on cascades, including lift and drag forces. Graphs are presented for mean deflection and stagnation pressure loss as functions of incidence angle. The document aims to calculate coefficients for drag, lift, and loss based on these graphs and the presented formulas.
simple pendulum and compound pendulum | vaibration | u.o.b | Saif al-din ali
saif aldin ali madi
سيف الدين علي ماضي
s96aif@gmail.com
In this laboratory practice the simulation of a simple pendulum was
carried out with the objective of determining the acceleration of gravity
and its uncertainty, through the data obtained in the simulation. In this
one was made the assembly of a simple pendulum through a rope, a
weight, a grader and the base for pendulums, which allowed us to
obtain through the following instruments rule and timer, data as the time
in which 20 oscillations are completed and the length of the pendulum,
taking into account the uncertainties of each instrument, these data
were organized into tables and then used in the realization of graphs
expressing the time as a function of the length of the pendulum, in
addition to calculating the acceleration of gravity and its uncertainty.
CFD Analysis of Symmetrical Tangential Inlet Cyclone SeparatorIRJET Journal
This document discusses a computational fluid dynamics (CFD) analysis of a symmetrical tangential inlet cyclone separator compared to a classical cyclone separator. The CFD analysis is conducted using ANSYS to simulate gas-particle flow through the separators. The results show that modifying the cyclone geometry by adding a symmetrical tangential inlet improves the cyclone's performance by increasing the tangential velocity within the separator compared to the classical single inlet design. Specifically, static pressure was found to be more uniform throughout the body of the symmetrical inlet cyclone separator.
IRJET-Second Throat Diffuser System at Different Back Pressure for High Altit...IRJET Journal
This document discusses the design and analysis of a second throat diffuser system for testing rocket engines at high altitude conditions. Key points:
1) A second throat diffuser was optimized with a 1m straight section, 1.2m throat diameter, and 12m throat length to provide stable flow and suitable pressure recovery for high altitude testing.
2) Numerical simulations were performed to analyze the diffuser's performance at different back pressures, identifying that below 200mbar the nozzle and diffuser flows would be stable and expansion results good.
3) Experimental testing of the second throat diffuser design in a high altitude test facility verified the recovered pressure, confirming the nozzle and diffuser designs were suitable for high altitude simulation
Second Throat Diffuser System at Different Back Pressure for High Altitude TestIRJET Journal
The document discusses the design and testing of a second throat diffuser system for use in a high altitude test facility. The diffuser is designed to recover pressure from rocket engine exhaust and maintain a stable low pressure environment to accurately simulate high altitude conditions on the ground. Various diffuser designs are analyzed through simulations to optimize dimensions for stable flow and suitable pressure recovery. Testing of the optimized design in a high altitude test model facility confirms it recovers pressure as predicted and provides an accurate expansion for testing high area ratio rocket nozzles. Key parameters investigated include diffuser dimensions, back pressure levels, and effects of varying rocket motor designs on the critical back pressure that can be sustained by the diffuser.
This document provides information about a course on turbo machines taught by Mr. Thanmay J. S. at VVIET Mysore. The course aims to analyze the energy transfer in radial and axial flow turbo machines using the degree of reaction and utilization factor. It covers general analysis of radial flow compressors and pumps, including velocity triangles and expressions for power, degree of reaction, and the effect of blade discharge angle on performance. It also discusses general analysis of axial flow pumps and compressors, and expressions for degree of reaction and utilization factor in axial flow turbines.
The document summarizes a simulation of a convergent-divergent rocket nozzle using computational fluid dynamics (CFD) analysis. It discusses the aims of analyzing flow parameters like pressure and temperature inside converging-divergent and conical nozzles. It then analyzes 5 cases of converging-divergent nozzles with divergent angles from 15 to 35 degrees. The results show that static pressure decreases and Mach number increases with larger divergent angles, with the optimum angle being 30 degrees where Mach number reaches 3.66.
Design & Computational Fluid Dynamics Analyses of an Axisymmetric Nozzle at T...IRJET Journal
This document summarizes a numerical investigation of flow through an axisymmetric boat tail nozzle at transonic conditions using computational fluid dynamics (CFD). The study analyzed the effects of friction on adiabatic flow and determined a friction factor of 0.001452. CFD simulations using GAMBIT and FLUENT were conducted with a k-epsilon turbulence model to analyze pressure distributions, velocity vectors, and coefficient of pressure plots. Validation against experimental data showed reasonable agreement. The study concluded that CFD can predict nozzle aerodynamics, though turbulence models under predict pressures. Friction was found to impact real flows compared to isentropic assumptions. Future work could analyze shockwaves at Mach 0.8.
This document describes a computational fluid dynamics simulation of atmospheric turbulence using ANSYS Fluent. It includes the geometry, meshing parameters, boundary conditions, and initial setup of the model. The geometry consists of vortex generators, a barrier wall, and three different roughness elements intended to model features that create turbulence in the atmosphere. Governing equations for the fluid flow include the Navier-Stokes equations and k-epsilon turbulence model. Results will analyze velocity profiles, turbulence intensity, and total pressure to validate the simulation against literature data on atmospheric turbulence.
Investigation on Divergent Exit Curvature Effect on Nozzle Pressure Ratio of ...IJERA Editor
The objective of this project work is to computationally analyze shock waves in the Convergent Divergent (CD) Nozzle. The commercial CFD code Fluent is employed to analyze the compressible flow through the nozzle. The analysis is about NPR (Nozzle Pressure Ratio) i.e., the ratio between exit pressure of the nozzle to ambient pressure. The various models of CD Nozzle are designed and the results are compared. The flow characteristic of shockwave for various design of CD Nozzle is also discussed. The purpose of this project is to investigate supersonic C-D nozzle flow for increasing NPR (Nozzle pressure ratio) through CFD. The imperfect matching between the pressures and ambient pressure and exit pressure leads to the formation of a complicated shock wave structure. Supersonic nozzle flow separation occurs in CD nozzles at NPR values far above their design value that results in shock formation inside the nozzle. The one-dimensional analysis approximations are not accurate, in reality the flow detaches from the wall and forms a separation region, subsequently the flow downstream becomes non-uniform and unstable. Shock wave affects flow performance of nozzle from NPR value 1.63 for existing geometrical conditions of nozzle. Problem of using this nozzle above 1.63NPR is shock wave at downstream of throat. After shock wave, static pressure increases further downstream of flow. It leads to flow separation and back pressure effects. Back pressure makes nozzle chocked. To investigate this problem, geometry of divergent portion is introduced and analysed through CFD. This is expected in resulting of reduction of flow separation and back pressure effect as well as increase in nozzle working NPR.
Investigation on Divergent Exit Curvature Effect on Nozzle Pressure Ratio of ...IJERA Editor
The objective of this project work is to computationally analyze shock waves in the Convergent Divergent (CD) Nozzle. The commercial CFD code Fluent is employed to analyze the compressible flow through the nozzle. The analysis is about NPR (Nozzle Pressure Ratio) i.e., the ratio between exit pressure of the nozzle to ambient pressure. The various models of CD Nozzle are designed and the results are compared. The flow characteristic of shockwave for various design of CD Nozzle is also discussed. The purpose of this project is to investigate supersonic C-D nozzle flow for increasing NPR (Nozzle pressure ratio) through CFD. The imperfect matching between the pressures and ambient pressure and exit pressure leads to the formation of a complicated shock wave structure. Supersonic nozzle flow separation occurs in CD nozzles at NPR values far above their design value that results in shock formation inside the nozzle. The one-dimensional analysis approximations are not accurate, in reality the flow detaches from the wall and forms a separation region, subsequently the flow downstream becomes non-uniform and unstable. Shock wave affects flow performance of nozzle from NPR value 1.63 for existing geometrical conditions of nozzle. Problem of using this nozzle above 1.63NPR is shock wave at downstream of throat. After shock wave, static pressure increases further downstream of flow. It leads to flow separation and back pressure effects. Back pressure makes nozzle chocked. To investigate this problem, geometry of divergent portion is introduced and analysed through CFD. This is expected in resulting of reduction of flow separation and back pressure effect as well as increase in nozzle working NPR.
Experimental Investigations and Computational Analysis on Subsonic Wind Tunnelijtsrd
This paper disclose the entire approach to design an open circuit subsonic wind tunnel which will be used to consider the wind impact on the airfoil. The current rules and discoveries of the past research works were sought after for plan figuring of different segments of the wind tunnel. Wind speed of 26 m s have been practiced at the test territory. The wind qualities over a symmetrical airfoil are viewed as probably in a low speed wind tunnel. Tests were finished by moving the approach, from 0 to 5 degree. The stream attributes over a symmetrical airfoil are examined tentatively. The pressure distribution on the airfoil area was estimated, lift and drag force were estimated and velocity profiles were acquired. Rishabh Kumar Sahu | Saurabh Sharma | Vivek Swaroop | Vishal Kumar ""Experimental Investigations and Computational Analysis on Subsonic Wind Tunnel"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-3 , April 2019, URL: https://www.ijtsrd.com/papers/ijtsrd23511.pdf
Paper URL: https://www.ijtsrd.com/engineering/mechanical-engineering/23511/experimental-investigations-and-computational-analysis-on-subsonic-wind-tunnel/rishabh-kumar-sahu
Episode 40 : DESIGN EXAMPLE – DILUTE PHASE PNEUMATIC CONVEYINGSAJJAD KHUDHUR ABBAS
Episode 40 : DESIGN EXAMPLE – DILUTE PHASE PNEUMATIC CONVEYING
DESIGN EXAMPLE – DILUTE PHASE PNEUMATIC CONVEYING
A plastics production plant wants to increase the capacity through an existing conveying system. The existing system has 6 inch ID pipes and is configured as shown in the diagram below.
The High Density Polyethylene (HDPE) particles have an average size of 4 mm. The conveying gas is at 68oF. The existing blower can produce 1375 SCFM.
The desired capacity increase is from 20,000 lbm/hr to 30,000 lbm/hr. Can the existing blower and pipe system meet this increase in capacity?
Assume the pressure drop across the cyclone is 5 inches of water. The pressure drop across the blower inlet pipe and silencers is 0.3 psi. The pipe bends have R/D = 6. Pipe roughness is k = 0.00015 ft. The particles have density pρ = 59 lbm/ft3. Terminal velocity of the particles is = 30.6 ft/s.
SAJJAD KHUDHUR ABBAS
Ceo , Founder & Head of SHacademy
Chemical Engineering , Al-Muthanna University, Iraq
Oil & Gas Safety and Health Professional – OSHACADEMY
Trainer of Trainers (TOT) - Canadian Center of Human
Development
Episode 40 : DESIGN EXAMPLE – DILUTE PHASE PNEUMATIC CONVEYING (Part 2)SAJJAD KHUDHUR ABBAS
Episode 40 : DESIGN EXAMPLE – DILUTE PHASE PNEUMATIC CONVEYING (Part 2)
DESIGN EXAMPLE – DILUTE PHASE PNEUMATIC CONVEYING
A plastics production plant wants to increase the capacity through an existing conveying system. The existing system has 6 inch ID pipes and is configured as shown in the diagram below.
The High Density Polyethylene (HDPE) particles have an average size of 4 mm. The conveying gas is at 68oF. The existing blower can produce 1375 SCFM.
The desired capacity increase is from 20,000 lbm/hr to 30,000 lbm/hr. Can the existing blower and pipe system meet this increase in capacity?
Assume the pressure drop across the cyclone is 5 inches of water. The pressure drop across the blower inlet pipe and silencers is 0.3 psi. The pipe bends have R/D = 6. Pipe roughness is k = 0.00015 ft. The particles have density pρ = 59 lbm/ft3. Terminal velocity of the particles is = 30.6 ft/s.
SAJJAD KHUDHUR ABBAS
Ceo , Founder & Head of SHacademy
Chemical Engineering , Al-Muthanna University, Iraq
Oil & Gas Safety and Health Professional – OSHACADEMY
Trainer of Trainers (TOT) - Canadian Center of Human
Development
Experimental Analysis of Flow through Concentric Vane Swirler in Combustion C...IJSTA
This document describes an experimental analysis of flow through a concentric vane swirler in a combustion chamber using atmospheric air. The study examines the design of a swirler that can produce a central recirculation zone for flame stabilization. Experiments were conducted taking atmospheric cold air instead of hot gases through the combustion chamber. The results provide insight into the complex interactions between swirling flow, pressure gradients, and turbulent mixing in combustion systems.
IRJET - Characteristics of 90°/90° S-Shaped Diffusing Duct using SST K-O Turb...IRJET Journal
1) The document summarizes a study that uses computational fluid dynamics (CFD) to analyze the characteristics of a 90/90 S-shaped diffusing duct.
2) The study explores the velocity variation, pressure recovery coefficient, and total pressure loss coefficient along the duct using the SST k-ω turbulent model.
3) The results show flow separation near the top and bottom walls, the formation of counter-rotating vortex pairs at the exit, and that the pressure recovery coefficient first increases then decreases before increasing again towards the exit.
This presentation discusses the calculation of pigging effectiveness for petroleum pipelines. It defines pigging as pushing a device with metal brushes through pipelines to clean deposits from inner walls. Three equations are provided to calculate pigging effectiveness by comparing pressure differences and flow rates before and after pigging. An example calculation shows an effectiveness of 1.56% using the first equation. The importance of pigging and the Moody chart for relating friction factors, Reynolds numbers, and surface roughness are also briefly discussed.
This document analyzes the design of a multi-stage axial-flow compressor. It breaks the analysis into several sections:
1) Evaluating the relative Mach number at the tip of the first stage to ensure transonic but not supersonic flow.
2) Calculating the annulus dimensions at the inlet and outlet using assumptions about mean radius, constant mass flow rate, and overall pressure ratio.
3) The analysis makes simplifying assumptions to allow preliminary design calculations while noting areas for more detailed future analysis.
This document summarizes a study comparing two supersonic nozzles with different outlet divergence angles (10 degrees and 20 degrees). Computational fluid dynamics (CFD) analysis was performed on the nozzles, which had the same inlet and throat dimensions but different expansion angles. The analysis found that the nozzle with a 20 degree divergence angle produced a higher exit velocity (Mach 5.62 vs 4.31) and had lower temperatures and pressures throughout the expansion zone, indicating it was the better-performing nozzle of the two designs.
Comparative study of supersonic nozzleseSAT Journals
Abstract
In this experiment, comparative flow analysis of two different nozzles has been performed. The analysis has been performed according to the shape of the nozzles by keeping the same input parameters. The experiment has been carried out in two preliminary steps. First one includes modeling and CFD analysis and the later part is about comparing their different properties. For this analysis, two dimensional axisymmetric nozzle geometries were drawn in Solid Works and CFD analysis is done using Fluent. The basic difference between these two nozzle geometries is their outlet divergence angle, whereas the inlet cross-sectional area, throat cross-sectional area and nozzle length are exactly same. These two nozzle geometries were drawn having outlet divergence angle 10° and 20° respectively. Velocity, pressure and temperature distribution on both nozzles have been studied to take the final decision. From analysis, it is clearly observed that the nozzle having outlet divergence angle 20° gives higher exit velocity with Mach number of 5.62 whereas the nozzle with outlet divergence angle 10° gives an exit velocity with Mach number of 4.31. Besides, lower temperature distribution and lower pressure distribution were observed in the nozzle with outlet divergence angle 20° throughout the expansion zone and nozzle with outlet divergence angle 10° exhibits higher temperature and pressure throughout the expansion zone. As the nozzle with divergence angle 20° gives higher exit velocity, it is the better one between these two nozzles.
Keywords: Convergent-divergent nozzle, CFD, ANSYS Fluent, Outlet divergence angle, SolidWorks.
Flow analysis of centrifugal pump using CFX solver and remedies for cavitatio...IJERA Editor
This document discusses a study that uses computational fluid dynamics (CFD) software to analyze flow characteristics in a centrifugal pump. Specifically:
1. CFD software called CFX is used to simulate fluid flow through a 3D model of a centrifugal pump with defined boundary conditions.
2. The software helps optimize the pump design in an iterative manner based on results like pressure and velocity plots.
3. A key issue analyzed is cavitation, where vapor bubbles form and collapse in the pump due to low pressure. The document examines factors that cause cavitation and its negative effects.
Nonlinear integral control for dc motor speed control with unknown and variab...Saif al-din ali
This document discusses nonlinear integral control for DC motor speed control with unknown and variable external torque. It begins with an introduction to DC motors and common speed control techniques. It then provides the basic model of a DC motor and derives the transfer function. It discusses nonlinear control systems and elements like saturation, deadband, and friction. It describes methods for solving nonlinear transient responses, nonlinear system stability, and provides a Simulink model example comparing PI and P controller performance for speed and error. References for DC motor speed control and optimization of PI controllers are also provided.
The document provides design specifications for a mechanical system that uses pulleys, gears, a shaft, and bearings. It includes details on the power input and output requirements for different components, material properties, and design considerations. The author is tasked with designing: 1) Pulleys B and K with a belt to transmit power from pulley K to B; 2) Spur gears C and G to transmit 65% of power; 3) Helical gears E and H to transmit the remaining power; 4) The shaft connecting the components; 5) Bearings A and D to support the shaft. Calculations and checks are required to validate the design meets stress, wear, and reliability requirements.
This document summarizes an experiment conducted on a steam condenser to evaluate its thermal operation under co-current and counter-current modes. It includes an abstract, introduction, apparatus description, calculations and results from testing the condenser under parallel and counter flow with constant pressure and steam flow rate. Charts show changes in temperature, heat transfer rate, efficiency and overall heat transfer coefficient for each test configuration.
The document discusses internal combustion (I.C.) engines. It begins by outlining the objective of identifying types of I.C. engines, their parts, and how each part works. It then provides classifications of I.C. engines and lists their major components. The working principles of four-stroke and two-stroke engines are explained, including diagrams of their cycles. Key aspects covered are intake, compression, combustion, power and exhaust strokes in four-stroke engines and the use of crankcases and ports to enable intake and exhaust in two strokes.
This document describes an experiment performed on a DC motor to determine its steady state gain. Measurements were taken of the motor's angular velocity and input voltage over time. The steady state gain (Ks) was calculated from these measurements for both the motor and generator configurations. Ks was found to be 7.36356 rpm/V on average for the motor and 5.596616 rpm/V for the generator. A proportional relationship between voltage and angular velocity was observed from the plotted data. The DC motor model and experimental results showed some non-linear behavior, likely due to load and operating conditions.
The document discusses internal combustion (I.C.) engines. It begins by identifying the objective of understanding I.C. engine types, parts, and how each part works. It then provides classifications of I.C. engines based on application, design, cycle, valves/ports, fuel type, ignition, combustion chamber, load control, and cooling. Details are given on common engine components and how four-stroke and two-stroke engines operate through intake, compression, power, and exhaust strokes. In conclusion, the document provides a discussion question about writing a short report on I.C. engines.
The document discusses different types of hybrid vehicles. It describes the key components of a gasoline-electric hybrid car, including a gasoline engine, fuel tank, electric motor, generator, batteries, and transmission. Hybrid vehicles are classified into three main types: micro hybrids, which have a motor to assist with starting and accessories; mild hybrids, which have a more powerful motor to support starting and provide supplementary torque; and full hybrids, where the electric motor can power the vehicle on its own as well as charge via regenerative braking.
Nonlinear integral control for dc motor speed controlSaif al-din ali
This document discusses nonlinear integral control for DC motor speed control with unknown and variable external torque. It begins with an introduction to DC motors and common speed control techniques. It then provides the basic model of a DC motor and derives the transfer function. It discusses nonlinear control systems and elements like saturation, deadband, and friction. It describes methods for solving nonlinear transient responses, nonlinear system stability, and provides a Simulink model example comparing PI and P controller performance for speed and error. References for DC motor speed control and optimization of PI controllers are also provided.
This document discusses Prandtl-Meyer expansion fans in compressible fluid flow. It begins with an example problem involving a flow with a Mach number of 3. It then derives the governing equations for Prandtl-Meyer expansion fans mathematically. Several examples are worked through demonstrating how to calculate flow properties after an expansion wave using the Prandtl-Meyer function. The document concludes by discussing the maximum turning angle achievable with an expansion fan and assigning homework problems.
1) The document discusses oblique shock waves in compressible fluid flow, providing equations for continuity, momentum, and energy that must be satisfied across an oblique shock.
2) It derives an equation to relate the shock angle θ to the freestream Mach number M1 and wedge angle β, allowing calculation of flow properties downstream.
3) The total downstream Mach number M2 is expressed in terms of Mn2 and Mt2 using geometric arguments.
This document presents explicit analytical solutions for pressure across oblique shock and expansion waves in supersonic flow. It begins by introducing the need for explicit pressure-deflection solutions in solving aerodynamic problems. It then presents:
1) Exact explicit solutions for pressure coefficient and ratio across weak and strong oblique shock waves as functions of deflection angle.
2) Third-order accurate explicit unitary solutions for pressure coefficient and ratio across oblique shocks and expansions as functions of deflection angle.
3) Numerical validation showing good agreement of the new explicit solutions with exact solutions for a range of Mach numbers and deflection angles.
Characteristics of shock reflection in the dual solution domainSaif al-din ali
This document summarizes a numerical study that investigated the effects of laser energy deposition on shock reflection transitions in supersonic flow. The study used computational fluid dynamics simulations to model laser energy being deposited in front of symmetrical wedges, creating a dual solution domain where different shock reflection patterns can occur. The results showed that laser energy deposition could induce transitions between regular and Mach shock reflections, and that the transition characteristics depended on the location and amount of energy deposited. Depositing more energy required more time for transition, and transition did not occur above a certain energy level or when depositing on the centerline.
Characteristics of shock reflection in the dual solution domainSaif al-din ali
This document summarizes a numerical study that investigates the use of laser energy deposition to induce transitions between regular and Mach shock reflections in supersonic flow over dual wedge configurations. The study validated its numerical approach by comparing results to an experiment involving laser deposition in front of a sphere. Simulations then examined how varying the position and amount of laser energy deposition could influence transition characteristics in the dual solution domain over wedge configurations. Key findings included how transition time and occurrence depended on deposition parameters and position relative to the shock waves and wedges.
This document summarizes research on oblique shock waves that appear in supersonic carbon dioxide two-phase flow, as occurs in ejector refrigeration cycles. It presents:
1) Theoretical analyses showing that two types of oblique shock waves can occur - weak shocks where flow remains supersonic, and strong shocks with large pressure recovery and subsonic flow.
2) An experiment using a carbon dioxide two-phase flow channel to observe these shock waves.
3) Equations governing compressible two-phase flow and the conditions under which strong and weak oblique shock waves form, to compare with experimental results.
The function of management should focus on getting people to work towards and...Saif al-din ali
The function of management should focus on getting people to work towards and achieve organizational goals and objectives. in short, management's primary purpose should be to increase
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive function. Exercise causes chemical changes in the brain that may help protect against mental illness and improve symptoms.
The document discusses the benefits of exercise for both physical and mental health. Regular exercise can improve cardiovascular health, reduce symptoms of depression and anxiety, enhance mood, and boost brain function. Staying physically active helps fight diseases and conditions, increases energy levels, and promotes better quality of life.
Me6503 design-of-machine-elements-unit-ii-notesSaif al-din ali
The document discusses the benefits of exercise for both physical and mental health. It notes that regular exercise can reduce the risk of diseases like heart disease and diabetes, improve mood, and reduce feelings of stress and anxiety. Exercise is also said to boost brain health and function as we age by increasing blood flow and oxygen to the brain.
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise causes chemical changes in the brain that may help protect against mental illness and improve symptoms.
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive function. Exercise causes chemical changes in the brain that may help protect against mental illness and improve symptoms.
Literature Review Basics and Understanding Reference Management.pptxDr Ramhari Poudyal
Three-day training on academic research focuses on analytical tools at United Technical College, supported by the University Grant Commission, Nepal. 24-26 May 2024
Redefining brain tumor segmentation: a cutting-edge convolutional neural netw...IJECEIAES
Medical image analysis has witnessed significant advancements with deep learning techniques. In the domain of brain tumor segmentation, the ability to
precisely delineate tumor boundaries from magnetic resonance imaging (MRI)
scans holds profound implications for diagnosis. This study presents an ensemble convolutional neural network (CNN) with transfer learning, integrating
the state-of-the-art Deeplabv3+ architecture with the ResNet18 backbone. The
model is rigorously trained and evaluated, exhibiting remarkable performance
metrics, including an impressive global accuracy of 99.286%, a high-class accuracy of 82.191%, a mean intersection over union (IoU) of 79.900%, a weighted
IoU of 98.620%, and a Boundary F1 (BF) score of 83.303%. Notably, a detailed comparative analysis with existing methods showcases the superiority of
our proposed model. These findings underscore the model’s competence in precise brain tumor localization, underscoring its potential to revolutionize medical
image analysis and enhance healthcare outcomes. This research paves the way
for future exploration and optimization of advanced CNN models in medical
imaging, emphasizing addressing false positives and resource efficiency.
Batteries -Introduction – Types of Batteries – discharging and charging of battery - characteristics of battery –battery rating- various tests on battery- – Primary battery: silver button cell- Secondary battery :Ni-Cd battery-modern battery: lithium ion battery-maintenance of batteries-choices of batteries for electric vehicle applications.
Fuel Cells: Introduction- importance and classification of fuel cells - description, principle, components, applications of fuel cells: H2-O2 fuel cell, alkaline fuel cell, molten carbonate fuel cell and direct methanol fuel cells.
Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapte...University of Maribor
Slides from talk presenting:
Aleš Zamuda: Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapter and Networking.
Presentation at IcETRAN 2024 session:
"Inter-Society Networking Panel GRSS/MTT-S/CIS
Panel Session: Promoting Connection and Cooperation"
IEEE Slovenia GRSS
IEEE Serbia and Montenegro MTT-S
IEEE Slovenia CIS
11TH INTERNATIONAL CONFERENCE ON ELECTRICAL, ELECTRONIC AND COMPUTING ENGINEERING
3-6 June 2024, Niš, Serbia
Optimizing Gradle Builds - Gradle DPE Tour Berlin 2024Sinan KOZAK
Sinan from the Delivery Hero mobile infrastructure engineering team shares a deep dive into performance acceleration with Gradle build cache optimizations. Sinan shares their journey into solving complex build-cache problems that affect Gradle builds. By understanding the challenges and solutions found in our journey, we aim to demonstrate the possibilities for faster builds. The case study reveals how overlapping outputs and cache misconfigurations led to significant increases in build times, especially as the project scaled up with numerous modules using Paparazzi tests. The journey from diagnosing to defeating cache issues offers invaluable lessons on maintaining cache integrity without sacrificing functionality.
A SYSTEMATIC RISK ASSESSMENT APPROACH FOR SECURING THE SMART IRRIGATION SYSTEMSIJNSA Journal
The smart irrigation system represents an innovative approach to optimize water usage in agricultural and landscaping practices. The integration of cutting-edge technologies, including sensors, actuators, and data analysis, empowers this system to provide accurate monitoring and control of irrigation processes by leveraging real-time environmental conditions. The main objective of a smart irrigation system is to optimize water efficiency, minimize expenses, and foster the adoption of sustainable water management methods. This paper conducts a systematic risk assessment by exploring the key components/assets and their functionalities in the smart irrigation system. The crucial role of sensors in gathering data on soil moisture, weather patterns, and plant well-being is emphasized in this system. These sensors enable intelligent decision-making in irrigation scheduling and water distribution, leading to enhanced water efficiency and sustainable water management practices. Actuators enable automated control of irrigation devices, ensuring precise and targeted water delivery to plants. Additionally, the paper addresses the potential threat and vulnerabilities associated with smart irrigation systems. It discusses limitations of the system, such as power constraints and computational capabilities, and calculates the potential security risks. The paper suggests possible risk treatment methods for effective secure system operation. In conclusion, the paper emphasizes the significant benefits of implementing smart irrigation systems, including improved water conservation, increased crop yield, and reduced environmental impact. Additionally, based on the security analysis conducted, the paper recommends the implementation of countermeasures and security approaches to address vulnerabilities and ensure the integrity and reliability of the system. By incorporating these measures, smart irrigation technology can revolutionize water management practices in agriculture, promoting sustainability, resource efficiency, and safeguarding against potential security threats.
ISPM 15 Heat Treated Wood Stamps and why your shipping must have one
Nozzles
1. Saif al-din ali Madi
Department of Mechanical Engineering/ College of Engineering/ University of Baghdad
26/11/2018 1 | P a g e
[power plant Laboratory II]
University of Baghdad
Name: - Saif Al-din Ali -B-
2. Saif al-din ali Madi
Department of Mechanical Engineering/ College of Engineering/ University of Baghdad
26/11/2018 2 | P a g e
TABLE OF CONTENTS
Objective............................................................................I
INTRODUCTION.............................................................II
THEORY.........................................................................III
Calculations and results..................................................V
DISCUSSION..................................................................VI
3. Saif al-din ali Madi
Department of Mechanical Engineering/ College of Engineering/ University of Baghdad
26/11/2018 3 | P a g e
Experiment Name:-
1. Objective
2. Introduction
Two types of nozzles: -
1. Converging-Diverging or " De Laval" Nozzles have been widely used over the last few
decades in many engineering contexts, from civil and mechanical to aerospace uses. They are
designed to accelerate fluids to supersonic speeds at the nozzle exit. Nearly all rockets make
use of this fact to create an effective propulsion system to reach high velocities. Whilst their
operation is of a simple appearance, the combination of flows reached, be that subsonic and
supersonic and the subsequent change of properties such as pressure, density and temperature
make the underlying investigation of their performance more complicated than first expected.
Their operation relies on the ratio between the inlet stagnation pressure P0 and outlet back pressure
Pb. As this ratio Pb/Po is brought down from unity, the mass flow rate increases till a maximum
value is achieved where the Mach number in the throat (see Figure 1) becomes sonic.
( Mach no = 1). This is referred to as "Choked flow". As the ratio is further decreased the flow
becomes supersonic in the diverging nozzle, till the design pressure ratio is achieved (0.53 for air)
with supersonic flow occurring at the nozzle exit. After this the flow becomes more complicated
and normal and oblique shock waves begin to occur inside and outside of the nozzle respectively.
The Purpose of this report is to gain an understanding of the nature of this flow by
investigating the pressure ratios effects on the mass flow rate of air through the system and the
differing pressure distributions that occur at varying lengths into the nozzle.
Figure 1. Schematic of a converging-diverging nozzle
2. converging nozzle
4. Saif al-din ali Madi
Department of Mechanical Engineering/ College of Engineering/ University of Baghdad
26/11/2018 4 | P a g e
Converging nozzles, as shown in Figure 2, are tubes with an area that decreases from the
nozzle entry to the exit (or throat) of the nozzle. As the nozzle area decreases, the flow
velocity increases, with the maximum flow velocity occurring at the nozzle throat. As the
inlet flow velocity is increased, flow velocity at the nozzle throat keeps increasing until it
reaches Mach 1. At this point, the flow at the throat gets choked, meaning that any further
increase of inlet flow velocity will not increase the flow velocity at the throat. It is for this
reason that converging nozzles are used to accelerate fluids in the subsonic flow regime
alone and can commonly be found on all commercial jets (except for the Concord) as they
travel at subsonic speeds.
Figure 2. Schematic of a converging nozzle
3. divergent nozzle
represents a divergent nozzle for a fluid whose peculiarity is that — decreases with
the drop of pressure, i.e., specific volume increases at a faster rate than velocity
with the drop of pressure. The area of cross-section should increase as the
pressure decreases.
Figure 3. diverging nozzle
the flow conditions that can be observed in a converging nozzle:
1. No flow condition, where the back-pressure is equal to the total pressure.
2. Subsonic flow, where the flow accelerates as area decreases, and the pressure
drops.
3. Subsonic flow, where there is significantly higher acceleration and the pressure
drops.
4. Choked flow, where any pressure drop does not accelerate the flow.
5. Choked flow, where the flow expands after the nozzle exit (considered non-
isentropic).
5. Saif al-din ali Madi
Department of Mechanical Engineering/ College of Engineering/ University of Baghdad
26/11/2018 5 | P a g e
Figure 4. Flow conditions and regimes in a converging nozzle (theoretical predictions)
converging-diverging nozzle shows the following seven profiles in the position
versus pressure ratio plot. Note that the first vertical dashed line on the left of the
p/pO versus distance along the nozzle plot is the location of the throat, the second
vertical dashed line is the location of the nozzle exit, and the horizontal dashed line
marks the choked condition.
1. Subsonic flow that never reaches choked condition.
2. Subsonic flow that reaches choked condition but does not attain supersonic velocities
(considered isentropic).
3. Subsonic flow that reaches choked condition, with the resulting supersonic flow forming a
normal shock, which then experiences subsonic deceleration. Here, the normal shock
causes a sudden drop in velocity and an increase in back-pressure, as indicated by the
sudden increase in p/pO.
4. Subsonic flow that reaches choked condition, with the resulting supersonic flow forming a
normal shock after the nozzle (considered isentropic in the nozzle).
5. Over-expanded flow – the pressure at the nozzle exit is lower than the ambient pressure,
causing the jet exiting the nozzle to be highly unstable with huge variations in pressure
and velocity as it travels downstream.
6. Flow after the choked condition is supersonic through the nozzle, and no shock is formed.
7. Under-expanded flow – the pressure at the nozzle exit is higher than the ambient pressure
and results in similar effects as over-expanded flow.
Figure 5. Flow conditions and regimes in a converging-diverging nozzle (theoretical
predictions)
3. Theory
6. Saif al-din ali Madi
Department of Mechanical Engineering/ College of Engineering/ University of Baghdad
26/11/2018 6 | P a g e
The characteristic of a nozzle can be graphically represented by diagram which
shows the mass flow rate through the nozzle related to the downstream pressure
outlet, with fluid conditions maintained constant upstream of the nozzle. In
subsonic nozzle conditions the flow rate can be expressed by:
𝑸𝒕𝒉 = 𝑨𝒖 ∗
𝒑 𝟎
√ 𝒑 𝟎 ∗ 𝒗
∗ √
𝟐𝒌
𝒌 − 𝟏
∗ [(
𝒑 𝐛
𝒑 𝟎
)
𝟐
𝒌
− (
𝒑 𝐛
𝒑 𝟎
)
𝒌+𝟏
𝒌
]
𝑨 𝒖 =
𝝅
𝟒
𝑫 𝒕𝒉
𝟐
Where:
Po = Total pressures upstream the nozzle,
Vo=Specific volume upstream the nozzle
Au= the narrow outlet section of the nozzle (throat).
P2 = Pressure downstream the nozzle,
K = Specific heat ratio (taken l for temperature 170 ° C)
For critical pressure downstream the nozzle the mass flow rate will be max (i.e.) the
nozzle is chocked can be calculated as:
𝑸 𝒎 𝒂𝒙
= 𝑨 𝒖
𝒑 𝟎
√ 𝒑 𝟎 𝝂 𝟎
∗ √
𝟐𝒌
𝒌 − 𝟏
𝑸 𝐞𝐱𝐩 = 𝒌√
𝜟𝒑
𝒗 𝒐
15. Saif al-din ali Madi
Department of Mechanical Engineering/ College of Engineering/ University of Baghdad
26/11/2018 15 | P a g e
Experimental
1
state Po bar Pb (bar) To ( c) ∆P (mmHg) Tb Vo (m3/kg)
1 3 2.5 145 0.12 137 0.464
2 3 2 145 0.16 130 0.464
3 3 1.5 145 0.19 125 0.464
4 3 1 145 0.2 120 0.464
2
1 4 3.5 150 0.16 144 0.3729
2 4 3 150 0.21 132.5 0.3729
3 4 2.5 150 0.24 132 0.3729
4 4 2 150 0.26 130 0.3729
Theoretical
1
1 5 4.6 165 75 0.3212
2 5 4.4 165 90 0.3212
3 5 4.1 165 125 0.3212
4 5 3.9 165 145 0.3212
2
1 6 5.5 168 75 0.275
2 6 5.2 168 90 0.2752
3 6 4.9 168 125 0.2752
4 6 4.6 168 145 0.2752
16. Saif al-din ali Madi
Department of Mechanical Engineering/ College of Engineering/ University of Baghdad
26/11/2018 16 | P a g e
Experimental
Q_exp R Q_th
1
0.078699279 1.142857143 0.031121877
0.0908741 1.333333333 0.039504565
0.099027755 1.6 0.042527341
0.101600333 2 0.041861669
2
0.101395891 1.111111111 0.035414399
0.116163587 1.25 0.04612388
0.124184098 1.428571429 0.051420707
0.129254907 1.666666667 0.053222816
Theoretical
1
0.085801054 1.071428571 0.03500503
0.093990346 1.111111111 0.041800254
0.110768685 1.176470588 0.049192115
0.119301525 1.224489796 0.052882165
2
0.092687731 1.076923077 0.042127888
0.101534322 1.129032258 0.051562331
0.119659346 1.186440678 0.05840326
0.12887706 1.25 0.063522547
Experimental
1
∆P*760 Pb (bar) +1 Po bar +1
91.2 3.5 4
121.6 3 4
144.4 2.5 4
152 2 4
2
121.6 4.5 5
159.6 4 5
182.4 3.5 5
197.6 3 5
Theoretical
1
75 5.6 6
90 5.4 6
125 5.1 6
145 4.9 6
2
75 6.5 7
90 6.2 7
125 5.9 7
145 5.6 7
17. Saif al-din ali Madi
Department of Mechanical Engineering/ College of Engineering/ University of Baghdad
26/11/2018 17 | P a g e
5. DISCUSSION
1.
0
0.02
0.04
0.06
0.08
0.1
0.12
0 0.5 1 1.5 2 2.5
Q
R
Experimental 1
Q_exp
Q_th
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0 0.5 1 1.5 2
Q
R
Experimental 2
Q_exp
Q_th
18. Saif al-din ali Madi
Department of Mechanical Engineering/ College of Engineering/ University of Baghdad
26/11/2018 18 | P a g e
In all the drawings, it turns out that the condition is direct and the pitch of the gradient varies
depending on the situation
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
1.05 1.1 1.15 1.2 1.25
Q
R
Theoretical 1
Q_exp
Q_th
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
1.05 1.1 1.15 1.2 1.25 1.3
Q
R
Theoretical 2
Q_exp
Q_th
19. Saif al-din ali Madi
Department of Mechanical Engineering/ College of Engineering/ University of Baghdad
26/11/2018 19 | P a g e
What is the effect of the downstream pressure nozzle on the flow rate values?
It has great influence on the amount of outflow and the type of flow as per the drawing