The document discusses different types of jet engines and speeds related to sound. It defines Mach number as the ratio of an object's speed to the speed of sound and categorizes speeds as subsonic (below the speed of sound), supersonic (above the speed of sound), and hypersonic (much greater than the speed of sound). It provides details on different jet engine types used at each speed category, including turbojets, ramjets, scramjets, as well as phenomena related to high speeds like sonic booms. Examples are given of vehicles and objects that operate at subsonic, supersonic and hypersonic speeds.
This is a presentation that contains detailed information about hypersonic vehicle or hyperplanes travelling at speeds upto 6 times the speed of sound. It also contains information about some hyperplanes like nasa x43, avatar hyperplane. This presentation also deals with the selection of suitable design for hyperplanes.
This is a presentation that contains detailed information about hypersonic vehicle or hyperplanes travelling at speeds upto 6 times the speed of sound. It also contains information about some hyperplanes like nasa x43, avatar hyperplane. This presentation also deals with the selection of suitable design for hyperplanes.
DESIGN AND ANALYSIS OF CONVERGENT DIVERGENT NOZZLE USING CFDNetha Jashuva
CFD is a branch of fluid mechanics that uses
numerical methods and algorithms to solve and analyze
problems that involve fluid flows. Computers are used to
perform the calculations required to simulate the interaction
of liquids and gases with surfaces defined by boundary
conditions. In this thesis, CFD analysis of flow within
Convergent-Divergent supersonic nozzle of different cross
sections rectangular, square and circular has been performed.
The analysis has been performed according to the shape of the
supersonic nozzle and keeping the same input conditions. Our
objective is to investigate the best suited nozzle which gives
high exit velocity among the different cross sections
considered. The application of these nozzles is mainly in
torpedos. The work is carried out in two stages: 1.Modeling
and analysis of flow for supersonic nozzles of different cross
sections.2.Prediction of best suited nozzle among the nozzles
considered. In this, initially modeling of the nozzles has been
done in CATIA and later on mesh generation and analysis
have been carried out in ANSYS FLUENT 14.5 and various
contours like velocity, pressure, temperature have been taken
and their variation according to different nozzles has been
studied.
OUTLINE OF PRESENTATION
Introduction
History
Principle of working
Element of typical hovercraft
Operation of the hovercraft
Advantage
Disadvantage
Applications of hovercraft
Future of hovercraft
conclusion
In modern vehicles mostly the nozzle used is de Laval nozzle. The major drawback using the the CD nozzle is it is failed to provide same efficiency under varying condition of the flight.
Solution for this is using altitude compensating nozzle, i.e., using Aerospike nozzle. The Aerospike nozzle provide same efficiency throughout the flight under varying ambient conditions, so this makes possible to use SSTO (single stage to orbit vehicle) having a single Aerospike nozzle with potential of being completely reusable.
DESIGN AND ANALYSIS OF CONVERGENT DIVERGENT NOZZLE USING CFDNetha Jashuva
CFD is a branch of fluid mechanics that uses
numerical methods and algorithms to solve and analyze
problems that involve fluid flows. Computers are used to
perform the calculations required to simulate the interaction
of liquids and gases with surfaces defined by boundary
conditions. In this thesis, CFD analysis of flow within
Convergent-Divergent supersonic nozzle of different cross
sections rectangular, square and circular has been performed.
The analysis has been performed according to the shape of the
supersonic nozzle and keeping the same input conditions. Our
objective is to investigate the best suited nozzle which gives
high exit velocity among the different cross sections
considered. The application of these nozzles is mainly in
torpedos. The work is carried out in two stages: 1.Modeling
and analysis of flow for supersonic nozzles of different cross
sections.2.Prediction of best suited nozzle among the nozzles
considered. In this, initially modeling of the nozzles has been
done in CATIA and later on mesh generation and analysis
have been carried out in ANSYS FLUENT 14.5 and various
contours like velocity, pressure, temperature have been taken
and their variation according to different nozzles has been
studied.
OUTLINE OF PRESENTATION
Introduction
History
Principle of working
Element of typical hovercraft
Operation of the hovercraft
Advantage
Disadvantage
Applications of hovercraft
Future of hovercraft
conclusion
In modern vehicles mostly the nozzle used is de Laval nozzle. The major drawback using the the CD nozzle is it is failed to provide same efficiency under varying condition of the flight.
Solution for this is using altitude compensating nozzle, i.e., using Aerospike nozzle. The Aerospike nozzle provide same efficiency throughout the flight under varying ambient conditions, so this makes possible to use SSTO (single stage to orbit vehicle) having a single Aerospike nozzle with potential of being completely reusable.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
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2. Title and Content Layout with List:
a) WHAT IS MACH AND IS MEAN?
b) SUBSONIC BRIEF EXPLAIN WITH JET ENGINE
c) SUPERSONIC BRIEF EXPLAIN WITH JET ENGINE
d) HYPERSONIC BRIEF EXPLAIN WITH JET ENGINE
e) SONIC BOOM BRIEF EXPLAIN WITH JET ENGINE
f) SONIC OBJECTS AND VEHICLES
g) NATURAL THINGS THOSE WHO HAVE THESE QUALITIES
3. MACH:
DEFINITION:
• RATIO OF SPEED OF OBJECT TO THE SPEED
OF SOUND IN THE SURROUNDING MEDIUM.
• Mach number, a measure of speed based on the
speed of sound.
• For normal and dry conditions and temperature
of 68 degrees F, this is 768 mph, 343 m/s, 1,125
ft/s, 667 knots, or 1,235 km/h. ... Ultimately,
Mach numbers are defined by their relationship
to the speed of sound.
4. SUBSONIC:
DEFINITION:
• For aircraft speeds which are very much less
than the speed of sound, the aircraft is said to
be subsonic. Typical speeds for subsonic
aircraft are less than 250 mph, and the Mach
number M is much less than one, M << 1 .
• When an object moves at a speed slower
than the speed of sound in the medium, it
creates circular shaped sound waves inside
one another.
5. TURBOJET ENGINE:
Two engineers, Frank Whittle in the United Kingdom and Hans von
Ohain in Germany, developed the concept independently into practical
engines during the late 1930s.
The turbojet is an air breathing jet engine, typically used in aircraft. It
consists of a gas turbine with a propelling nozzle. The gas turbine has
an air inlet, a compressor, a combustion chamber, and a turbine
(that drives the compressor). The compressed air from the compressor
is heated by burning fuel in the combustion chamber and then allowed
to expand through the turbine. The turbine exhaust is then expanded in
the propelling nozzle where it is accelerated to high speed to provide
thrust.
Turbojets. Jet engines are used to propel commercial airliners and
military aircraft. The simplest version of aircraft jet engines is a turbojet.
7. SUPERSONIC:
Etymology:
• The word supersonic comes from two Latin derived words; 1) super: above
and 2) sonus : sound, which together mean above sound or in other words
faster than sound.
Early Meaning:
• At the beginning of the 20th century, the term "supersonic" was used as an
adjective to describe sound whose frequency is above the range of normal
human hearing. The modern term for this meaning is "ultrasonic".
DEFINITION:
• Supersonic speed is the speed of an object that exceeds the speed of sound
(Mach 1). For objects traveling in dry air of a temperature of 20 °C (68 °F) at
sea level, this speed is approximately 343.2 m/s (1,126 ft /s; 768 mph; 667.1
kn ; 1,236 km/h).
8. RAMJET ENGINE:
• A ramjet is a variant of an air breathing jet engine that does not
include a rotary compressor; rather, it uses the engine's forward
motion to compress the incoming air. A ramjet cannot function at
zero airspeed and therefore cannot be used to power an aircraft
in all phases of flight.
• An object moving at high speed through air generates a high
pressure region upstream. A ramjet uses this high pressure in
front of the engine to force air through the tube, where it is
heated by combusting some of it with fuel. It is then passed
through a nozzle to accelerate it to supersonic speeds.
9.
10. • In aerodynamics, a hypersonic speed is one that
greatly exceeds the speed of sound, often stated as
starting at speeds of Mach 5 and above.
• Hypersonic is, obviously, supersonic on steroids.
But while "supersonic" has the clear cut definition of
being faster than the speed of sound (Mach 1),
hypersonic is a little fuzzier. ... Hypersonic speeds
have been achieved before
11. HYPERSONIC:
• LATEST:
• The United States is currently developing hypersonic missiles that
travel in excess of 6,000 miles per hour. The hypersonic SR-72 is
reported to be making great gains in secret. It's all very impressive,
but it can be hard to wrap your head around in the abstract, so let's do
a little bit of napkin math to really bring it home.
• HISTORY:
• Hypersonic speeds have been achieved before, most notably by the
U.S. Air Force and NASA when test pilot William J. Knight set the
record for fastest crewed flight in 1967 when he piloted the North
American X-15 to Mach 6.72 (4,520 mph) at an altitude of 102,100
feet. In 2004, the uncrewed NASA X-43A set a speed record at Mach
9.6, or 7,310 mph at an altitude of about 110,000 feet.
12. SCRAMJET ENGINE:
• A scramjet engine is an improvement over the ramjet engine as
it efficiently operates at hypersonic speeds and allows
supersonic combustion. Thus it is known as Supersonic
Combustion Ramjet, or Scramjet. ... The Scramjet engine
designed by ISRO uses Hydrogen as fuel and the Oxygen from
the atmospheric air as the oxidizer.
• As in ramjets, a scramjet relies on high vehicle speed to
compress the incoming air forcefully before combustion (hence
ramjet), but whereas a ramjet decelerates the air to subsonic
velocities before combustion, the airflow in a scramjet is
supersonic throughout the entire engine
13. SCRAMJET ENGINE:
• A scramjet (supersonic-combustion ramjet) is a ramjet engine in
which the airflow through the engine remains supersonic, or
greater than the speed of sound. Scramjet powered vehicles are
envisioned to operate at speeds up to at least Mach 15. ... In a
scramjet, even the airflow through the engine remains
supersonic.
• How fast can scramjets go?
• Theoretical projections place the top speed of a scramjet
between Mach 12 (14,000 km/h; 8,400 mph) and Mach 24
(25,000 km/h; 16,000 mph). For comparison, the orbital speed at
200 kilometers (120 mi) low earth orbit is 7.79 kilometers per
second (28,000 km/h; 17,400 mph).
16. • A sonic boom is the sound associated with the shock waves created whenever
an object travels through the air faster than the speed of sound. Sonic booms
generate enormous amounts of sound energy, sounding similar to an explosion
or a thunderclap to the human ear.
• Sonic boom is an impulsive noise similar to thunder. When the aircraft exceeds
the speed of sound, these pressure waves combine and form shock waves
which travel forward from the generation or "release" point.
• Most bullets make small sonic booms when flying through the air, which to our
ears sound like a loud, distinct “crack!”
• The general consensus is that a loud enough sound could cause an air
embolism in your lungs, which then travels to your heart and kills you.
Alternatively, your lungs might simply burst from the increased air pressure. ...
High-intensity ultrasonic sound (generally anything above 20KHz) can cause
physical damage.