The team designed and 3D printed a fuel injector that can operate in both flow-focusing and flow-blurring regimes. Testing showed that in flow-blurring mode, higher air-liquid ratios resulted in smaller spray angles and presumed better vaporization. In flow-focusing mode, the liquid micro-jet was still visible even at higher air-liquid ratios. More precise experiments could provide insight into droplet size variations with air-liquid ratio. The design has potential application in turbine engines with some modifications.
Ci engine combustion by Akhileshwar NiralaAkhilesh Roy
In a compression ignition (CI) engine, fuel is directly injected into the cylinder and spontaneously ignites when mixed with hot, compressed air. Combustion occurs in four stages: ignition delay, premixed combustion, mixing-controlled combustion, and late combustion. There are two main types of CI engines - direct injection engines which inject fuel directly into the chamber, and indirect injection engines which inject fuel into a prechamber before entering the main chamber. Factors like injection timing and quantity, intake conditions, and fuel properties can affect the ignition delay period.
A fuel injector injects atomized fuel into the cylinder in the proper quantity. It is the main component of a fuel injection system and is a spray delivery device. There are mechanical and electronic fuel injectors. Mechanical injectors use a single piston to pump, mix, and inject fuel while electronic injectors are controlled by an ECU through electromagnetic coils. Fuel injectors have components like a nozzle, needle valve, spring, and body to atomize and distribute fuel uniformly in the cylinder.
The document summarizes combustion in compression ignition (CI) engines. It describes how combustion occurs simultaneously in many spots in a non-homogeneous fuel-air mixture, controlled by fuel injection timing. The four stages of CI engine combustion are ignition delay, premixed combustion, mixing-controlled combustion, and late combustion. Factors like injection timing and fuel quality can affect the ignition delay period. Knock may occur if ignition delay is too long. The document provides diagrams to illustrate CI engine combustion processes and types.
The document discusses different types of injection systems used in diesel engines. It describes air injection systems which inject fuel along with compressed air but are not commonly used now. It also describes three types of solid or airless injection systems: common rail, individual pump and injector, and distributor injection. The common rail system uses a single high-pressure fuel pump to supply fuel to a header pipe that distributes to each injector. The individual pump system has a separate pump for each injector. The distributor system uses a central pump and distributor block to supply fuel to injectors.
A stratified charge engine provides a rich air-fuel mixture close to the spark plug to promote ignition, while using a lean mixture for the remainder of the cylinder. This allows for higher compression ratios and leaner mixtures than conventional engines, improving fuel efficiency. The overall air-fuel ratio can reach 40:1 to 50:1. While injectors increase costs, fuel efficiency gains are offsetting this. At high loads efficiency matches conventional engines due to a stoichiometric mixture. High variability can disrupt stratified mixture formation and reduce combustion if the rich area is not near the spark.
The document discusses the key stages of combustion in a compression ignition (CI) engine:
1. Ignition delay period where fuel does not ignite immediately upon injection.
2. Uncontrolled combustion period of rapid, steep pressure rise as accumulated fuel burns.
3. Controlled combustion period where further pressure rise is controlled by injection rate.
4. Afterburning period where unburnt fuel particles continue burning with oxygen.
It also examines factors affecting the ignition delay period like compression ratio, injection timing, and fuel quality. Knocking in a CI engine can occur if the ignition delay is too long, causing excess fuel accumulation and an abrupt pressure spike.
The document discusses the Wankel rotary engine, describing its construction with a triangular rotor inside a stationary housing. It explains the four-stroke combustion cycle is accomplished differently than in a piston engine, with the rotor undergoing continuous unidirectional motion rather than stopping between strokes. Key advantages and challenges of the Wankel engine are outlined, including its higher power-to-weight ratio but also issues with sealing and emissions compared to piston engines.
The document discusses automotive braking systems. It describes how braking systems work by converting the kinetic energy of a moving vehicle into heat energy through friction between braking components. The main types of braking systems are disc brakes and drum brakes. Key components of braking systems include calipers, rotors, pads, master cylinders, lines, and wheel cylinders. The hydraulic system pressurizes brake fluid to activate the brakes when the pedal is depressed.
Ci engine combustion by Akhileshwar NiralaAkhilesh Roy
In a compression ignition (CI) engine, fuel is directly injected into the cylinder and spontaneously ignites when mixed with hot, compressed air. Combustion occurs in four stages: ignition delay, premixed combustion, mixing-controlled combustion, and late combustion. There are two main types of CI engines - direct injection engines which inject fuel directly into the chamber, and indirect injection engines which inject fuel into a prechamber before entering the main chamber. Factors like injection timing and quantity, intake conditions, and fuel properties can affect the ignition delay period.
A fuel injector injects atomized fuel into the cylinder in the proper quantity. It is the main component of a fuel injection system and is a spray delivery device. There are mechanical and electronic fuel injectors. Mechanical injectors use a single piston to pump, mix, and inject fuel while electronic injectors are controlled by an ECU through electromagnetic coils. Fuel injectors have components like a nozzle, needle valve, spring, and body to atomize and distribute fuel uniformly in the cylinder.
The document summarizes combustion in compression ignition (CI) engines. It describes how combustion occurs simultaneously in many spots in a non-homogeneous fuel-air mixture, controlled by fuel injection timing. The four stages of CI engine combustion are ignition delay, premixed combustion, mixing-controlled combustion, and late combustion. Factors like injection timing and fuel quality can affect the ignition delay period. Knock may occur if ignition delay is too long. The document provides diagrams to illustrate CI engine combustion processes and types.
The document discusses different types of injection systems used in diesel engines. It describes air injection systems which inject fuel along with compressed air but are not commonly used now. It also describes three types of solid or airless injection systems: common rail, individual pump and injector, and distributor injection. The common rail system uses a single high-pressure fuel pump to supply fuel to a header pipe that distributes to each injector. The individual pump system has a separate pump for each injector. The distributor system uses a central pump and distributor block to supply fuel to injectors.
A stratified charge engine provides a rich air-fuel mixture close to the spark plug to promote ignition, while using a lean mixture for the remainder of the cylinder. This allows for higher compression ratios and leaner mixtures than conventional engines, improving fuel efficiency. The overall air-fuel ratio can reach 40:1 to 50:1. While injectors increase costs, fuel efficiency gains are offsetting this. At high loads efficiency matches conventional engines due to a stoichiometric mixture. High variability can disrupt stratified mixture formation and reduce combustion if the rich area is not near the spark.
The document discusses the key stages of combustion in a compression ignition (CI) engine:
1. Ignition delay period where fuel does not ignite immediately upon injection.
2. Uncontrolled combustion period of rapid, steep pressure rise as accumulated fuel burns.
3. Controlled combustion period where further pressure rise is controlled by injection rate.
4. Afterburning period where unburnt fuel particles continue burning with oxygen.
It also examines factors affecting the ignition delay period like compression ratio, injection timing, and fuel quality. Knocking in a CI engine can occur if the ignition delay is too long, causing excess fuel accumulation and an abrupt pressure spike.
The document discusses the Wankel rotary engine, describing its construction with a triangular rotor inside a stationary housing. It explains the four-stroke combustion cycle is accomplished differently than in a piston engine, with the rotor undergoing continuous unidirectional motion rather than stopping between strokes. Key advantages and challenges of the Wankel engine are outlined, including its higher power-to-weight ratio but also issues with sealing and emissions compared to piston engines.
The document discusses automotive braking systems. It describes how braking systems work by converting the kinetic energy of a moving vehicle into heat energy through friction between braking components. The main types of braking systems are disc brakes and drum brakes. Key components of braking systems include calipers, rotors, pads, master cylinders, lines, and wheel cylinders. The hydraulic system pressurizes brake fluid to activate the brakes when the pedal is depressed.
The document discusses the combustion stages in a compression ignition (CI) engine:
1. Ignition delay stage where fuel does not ignite immediately upon injection.
2. Uncontrolled combustion stage where rapid combustion occurs causing a steep pressure rise.
3. Controlled combustion stage where further pressure rise is controlled by injection rate.
4. Afterburning stage where unburnt fuel particles continue burning in the expansion stroke.
Diesel knock can occur if the ignition delay is long, allowing too much fuel to accumulate and cause an excessively rapid pressure rise when combustion begins. Methods to control knocking include using higher cetane fuel or modifying the combustion chamber design.
The document summarizes Mr. Mubassir Ghoniya's project on the ignition system of a spark ignition engine. It provides definitions of ignition systems, describes the key components and working of coil, magneto, and electronic ignition systems. It discusses the requirements, advantages, and disadvantages of each system. The firing order in a multi-cylinder engine is also explained briefly.
1) The document discusses different types of internal combustion engines including their classification based on cylinder arrangement, ignition method, combustion cycle, cooling method, and number of cylinders.
2) The key parts of an internal combustion engine are described including the cylinder, piston, piston rings, connecting rod, crank and crankshaft, valves, flywheel, and crankcase.
3) The four stroke cycles of both petrol and diesel engines are explained as intake, compression, power, and exhaust strokes along with the corresponding piston movement and crankshaft rotation in each stroke.
The document discusses the functions and components of diesel engine fuel, air intake, and exhaust systems. It describes how the fuel system meters and regulates fuel delivery to control power and emissions. The document outlines the evolution of fuel systems from mechanical to electronic control and various injection technologies. It also discusses the role of the air intake and exhaust systems in providing combustion air and removing exhaust gases. The potential causes of wear and failure in these systems are explained.
This document provides an overview of common rail direct injection (CRDI) technology for diesel engines. It discusses the history and development of CRDI, the operating principle, key components like the high-pressure pump and fuel rail, and how it works. CRDI allows for more precise fuel injection compared to older direct injection systems, improving power, efficiency and reducing emissions. It sees widespread use in modern passenger vehicles from many automakers. The document also covers the differences between direct and indirect injection, advantages and disadvantages of CRDI, and common applications.
The document discusses different types of combustion chambers used in spark ignition engines. It describes the T-head, L-head, I-head (overhead valve), and F-head combustion chamber designs. The T-head was the earliest type but was prone to knocking. The L-head and F-head were improvements that used a single camshaft but still had valves in the block. The overhead valve design with both valves in the cylinder head became most common after 1950 as it allows for higher compression ratios and improved performance. The document lists advantages of the overhead valve design such as reduced pumping losses and knock susceptibility.
A simple carburetor can only supply the correct air-fuel ratio at one throttle position. To address this, modern carburetors include additional systems like an idling system, auxiliary port system, power enrichment system, and accelerating pump system. These systems allow the carburetor to meet the engine's demands under different operating conditions like idling, cruising, acceleration, and high power.
AYB Mechatronics holds ISO 9001:2008 certification.With more than 10000 part numbers in stock, AYB Mechatronics offers its customers the best possible service in the replacement parts industry.
Design and Construction of a Connecting rodFaisal Niloy
The document describes the design and construction of a connecting rod. It begins with the objectives of studying the connecting rod, understanding its function, designing it using CAD, and constructing a physical model. It then provides an introduction to connecting rods, explaining that they connect the piston to the crankshaft and transmit reciprocating motion to rotational motion. The document discusses different manufacturing processes for connecting rods and compares technologies. It presents the design process for the connecting rod, showing calculations for dimensions. Finally, it includes the CAD model and photos of the constructed physical connecting rod.
IRJET- Design of Two-Stage Single Speed Gearbox for Transmission System of SA...IRJET Journal
The document describes the design of a two-stage single speed gearbox for an SAE BAJA vehicle. Key aspects include:
1) The gearbox provides high torque and moderate high speed to meet competition requirements of climbing a 35 degree gradient and reaching 60 kph.
2) It uses a continuously variable transmission for the first stage, providing a maximum ratio of 3.83:1. The two-stage gearbox then provides a further reduction ratio of 7.83:1.
3) Detailed calculations are shown for the gear and shaft designs of each stage to withstand the required torques and stresses. Materials, modules, diameters and other specifications are determined.
4) ANSYS
The automobile cooling system uses coolant, a water pump, radiator, and fan to maintain the engine's temperature. It circulates coolant through passages in the engine and radiator to absorb heat from the engine. The thermostat regulates coolant flow to help the engine reach optimal temperature quickly and maintain temperature under different operating conditions. The radiator, located in the vehicle's airflow, cools the coolant and the pressurized cooling system increases the coolant's boiling point to protect against overheating.
A diesel power plant is the combination of a diesel engine with an electric generator to generate electrical energy. A diesel compression-ignition engine is usually designed to run on diesel fuel, but some types are adapted for other liquid fuels or natural gas.
Case study on universal joint yoke & drive shaft fatigue failure in power tra...RutvijWakalkar
This document summarizes a case study on the fatigue failure of a universal joint yoke and drive shaft in a power transmission system. Spectroscopic, metallographic, hardness, and finite element analyses were conducted on both components. The universal joint yoke was made of AISI 5049H low alloy steel and failed due to fatigue at stress concentration points. The drive shaft was made of AISI 94B30H boron steel and its surface hardness was lower than the inner surface, indicating failure originated at the surface. The conclusion was that both failures were due to fatigue and modifications could be made to strengthen high stress areas.
The document describes an engine exhaust brake that is used as an auxiliary brake for slowing down vehicles travelling on long downhill gradients or in heavy traffic. The brake works by using compressed air and linkages to close a butterfly valve in the exhaust manifold, which cuts off the fuel supply when the foot control valve is pressed. This harness the engine's compression power to help slow the vehicle. The exhaust brake is effective at speeds below 40 kph and helps reduce fuel consumption.
Automotive Systems course (Module 09) - Ignition Systems for Internal Combus...Mário Alves
This presentation is dedicated to ignition systems for Internal Combustion Engines (ICE). The Ignition System is paramount for every car, motorcycle, truck or bus that runs an ICE based on gasoline, alcohol or Liquefied Petroleum Gas (LPG). It controls the timings when the spark plugs are fired, therefore igniting the air-fuel mixture in the combustion chamber. The Ignition System is one of the major players in what concerns the performance of the engine in terms of output power, pollutant emissions and fuel consumption.
This document presents information about diesel engines from an engineering workshop. It discusses the basic working principles of diesel engines, including compression ignition and the diesel cycle. It also covers key engine components like the engine block, crankshaft, pistons, connecting rods, cylinder head, camshaft, and turbocharger. The document categorizes engines based on criteria like number of strokes, ignition type, cylinder arrangement, and speed. It defines important engine terminology and identifies components on diagrams of engine sections and systems.
The document discusses cylinder head and valve train diagnosis and repair. It describes combustion chamber types, steps to recondition a cylinder head, inspecting valve guides, valve types and materials, testing valve springs, and valve rotators. It also covers grinding valve seats, measuring valve stem height, diagnosing cylinder heads, and replacing valve guides. Key terms related to cylinder head and valve components and repair are defined.
The document summarizes the key components and functions of a carburetor. It describes the fuel strainer, float chamber, metering and idling system, choke, throttle, and additional modern systems. It then discusses the working of specific carburetor types, including the Solex carburetor which uses a starting jet, compensating jet, main jet, idling jet, and accelerating jet to regulate fuel flow during different engine operations.
UPSRTC Industry traning ppt (1) shubham.pptx 27 sepshubham saini
The document provides details about a regional workshop of UPSRTC (Uttar Pradesh State Road Transport Corporation) located in Saharanpur. The workshop performs maintenance and repair work on roadway passenger vehicles, including parts replacement, lubrication, inspection, and testing. The workshop has several sections dedicated to different vehicle components, such as the engine, differential gear, and clutch sections. The engine section performs maintenance on engine parts like the cylinder head, oil pump, piston, crankshaft, and valves. The differential gear section works on the differential, and the clutch section services clutches.
The document provides information on diesel engine operation and diagnosis. It explains that diesel engines work via compression ignition where fuel is injected into hot compressed air, igniting the fuel. It describes the differences between direct injection and indirect injection diesel engines. It also outlines the key components of diesel engines like the fuel system, injection pump, injectors, turbochargers, and emission control systems. Advantages include torque and fuel economy, while disadvantages include noise, smell and cold starting issues.
Spectrum Technology Solutions was ranked among the top 501 managed service providers globally by Penton Technology's 9th annual MSP 501 ranking and study. The ranking identifies the most progressive IT managed service providers worldwide. Spectrum Technology Solutions' president and CEO Wayne Klug said they are honored to be listed among the top companies and are committed to delivering superior outcomes for customers through innovative technology and practices. The MSP 501 list is based on metrics like recurring revenue, growth, and other factors to recognize top cloud service providers.
The document discusses the combustion stages in a compression ignition (CI) engine:
1. Ignition delay stage where fuel does not ignite immediately upon injection.
2. Uncontrolled combustion stage where rapid combustion occurs causing a steep pressure rise.
3. Controlled combustion stage where further pressure rise is controlled by injection rate.
4. Afterburning stage where unburnt fuel particles continue burning in the expansion stroke.
Diesel knock can occur if the ignition delay is long, allowing too much fuel to accumulate and cause an excessively rapid pressure rise when combustion begins. Methods to control knocking include using higher cetane fuel or modifying the combustion chamber design.
The document summarizes Mr. Mubassir Ghoniya's project on the ignition system of a spark ignition engine. It provides definitions of ignition systems, describes the key components and working of coil, magneto, and electronic ignition systems. It discusses the requirements, advantages, and disadvantages of each system. The firing order in a multi-cylinder engine is also explained briefly.
1) The document discusses different types of internal combustion engines including their classification based on cylinder arrangement, ignition method, combustion cycle, cooling method, and number of cylinders.
2) The key parts of an internal combustion engine are described including the cylinder, piston, piston rings, connecting rod, crank and crankshaft, valves, flywheel, and crankcase.
3) The four stroke cycles of both petrol and diesel engines are explained as intake, compression, power, and exhaust strokes along with the corresponding piston movement and crankshaft rotation in each stroke.
The document discusses the functions and components of diesel engine fuel, air intake, and exhaust systems. It describes how the fuel system meters and regulates fuel delivery to control power and emissions. The document outlines the evolution of fuel systems from mechanical to electronic control and various injection technologies. It also discusses the role of the air intake and exhaust systems in providing combustion air and removing exhaust gases. The potential causes of wear and failure in these systems are explained.
This document provides an overview of common rail direct injection (CRDI) technology for diesel engines. It discusses the history and development of CRDI, the operating principle, key components like the high-pressure pump and fuel rail, and how it works. CRDI allows for more precise fuel injection compared to older direct injection systems, improving power, efficiency and reducing emissions. It sees widespread use in modern passenger vehicles from many automakers. The document also covers the differences between direct and indirect injection, advantages and disadvantages of CRDI, and common applications.
The document discusses different types of combustion chambers used in spark ignition engines. It describes the T-head, L-head, I-head (overhead valve), and F-head combustion chamber designs. The T-head was the earliest type but was prone to knocking. The L-head and F-head were improvements that used a single camshaft but still had valves in the block. The overhead valve design with both valves in the cylinder head became most common after 1950 as it allows for higher compression ratios and improved performance. The document lists advantages of the overhead valve design such as reduced pumping losses and knock susceptibility.
A simple carburetor can only supply the correct air-fuel ratio at one throttle position. To address this, modern carburetors include additional systems like an idling system, auxiliary port system, power enrichment system, and accelerating pump system. These systems allow the carburetor to meet the engine's demands under different operating conditions like idling, cruising, acceleration, and high power.
AYB Mechatronics holds ISO 9001:2008 certification.With more than 10000 part numbers in stock, AYB Mechatronics offers its customers the best possible service in the replacement parts industry.
Design and Construction of a Connecting rodFaisal Niloy
The document describes the design and construction of a connecting rod. It begins with the objectives of studying the connecting rod, understanding its function, designing it using CAD, and constructing a physical model. It then provides an introduction to connecting rods, explaining that they connect the piston to the crankshaft and transmit reciprocating motion to rotational motion. The document discusses different manufacturing processes for connecting rods and compares technologies. It presents the design process for the connecting rod, showing calculations for dimensions. Finally, it includes the CAD model and photos of the constructed physical connecting rod.
IRJET- Design of Two-Stage Single Speed Gearbox for Transmission System of SA...IRJET Journal
The document describes the design of a two-stage single speed gearbox for an SAE BAJA vehicle. Key aspects include:
1) The gearbox provides high torque and moderate high speed to meet competition requirements of climbing a 35 degree gradient and reaching 60 kph.
2) It uses a continuously variable transmission for the first stage, providing a maximum ratio of 3.83:1. The two-stage gearbox then provides a further reduction ratio of 7.83:1.
3) Detailed calculations are shown for the gear and shaft designs of each stage to withstand the required torques and stresses. Materials, modules, diameters and other specifications are determined.
4) ANSYS
The automobile cooling system uses coolant, a water pump, radiator, and fan to maintain the engine's temperature. It circulates coolant through passages in the engine and radiator to absorb heat from the engine. The thermostat regulates coolant flow to help the engine reach optimal temperature quickly and maintain temperature under different operating conditions. The radiator, located in the vehicle's airflow, cools the coolant and the pressurized cooling system increases the coolant's boiling point to protect against overheating.
A diesel power plant is the combination of a diesel engine with an electric generator to generate electrical energy. A diesel compression-ignition engine is usually designed to run on diesel fuel, but some types are adapted for other liquid fuels or natural gas.
Case study on universal joint yoke & drive shaft fatigue failure in power tra...RutvijWakalkar
This document summarizes a case study on the fatigue failure of a universal joint yoke and drive shaft in a power transmission system. Spectroscopic, metallographic, hardness, and finite element analyses were conducted on both components. The universal joint yoke was made of AISI 5049H low alloy steel and failed due to fatigue at stress concentration points. The drive shaft was made of AISI 94B30H boron steel and its surface hardness was lower than the inner surface, indicating failure originated at the surface. The conclusion was that both failures were due to fatigue and modifications could be made to strengthen high stress areas.
The document describes an engine exhaust brake that is used as an auxiliary brake for slowing down vehicles travelling on long downhill gradients or in heavy traffic. The brake works by using compressed air and linkages to close a butterfly valve in the exhaust manifold, which cuts off the fuel supply when the foot control valve is pressed. This harness the engine's compression power to help slow the vehicle. The exhaust brake is effective at speeds below 40 kph and helps reduce fuel consumption.
Automotive Systems course (Module 09) - Ignition Systems for Internal Combus...Mário Alves
This presentation is dedicated to ignition systems for Internal Combustion Engines (ICE). The Ignition System is paramount for every car, motorcycle, truck or bus that runs an ICE based on gasoline, alcohol or Liquefied Petroleum Gas (LPG). It controls the timings when the spark plugs are fired, therefore igniting the air-fuel mixture in the combustion chamber. The Ignition System is one of the major players in what concerns the performance of the engine in terms of output power, pollutant emissions and fuel consumption.
This document presents information about diesel engines from an engineering workshop. It discusses the basic working principles of diesel engines, including compression ignition and the diesel cycle. It also covers key engine components like the engine block, crankshaft, pistons, connecting rods, cylinder head, camshaft, and turbocharger. The document categorizes engines based on criteria like number of strokes, ignition type, cylinder arrangement, and speed. It defines important engine terminology and identifies components on diagrams of engine sections and systems.
The document discusses cylinder head and valve train diagnosis and repair. It describes combustion chamber types, steps to recondition a cylinder head, inspecting valve guides, valve types and materials, testing valve springs, and valve rotators. It also covers grinding valve seats, measuring valve stem height, diagnosing cylinder heads, and replacing valve guides. Key terms related to cylinder head and valve components and repair are defined.
The document summarizes the key components and functions of a carburetor. It describes the fuel strainer, float chamber, metering and idling system, choke, throttle, and additional modern systems. It then discusses the working of specific carburetor types, including the Solex carburetor which uses a starting jet, compensating jet, main jet, idling jet, and accelerating jet to regulate fuel flow during different engine operations.
UPSRTC Industry traning ppt (1) shubham.pptx 27 sepshubham saini
The document provides details about a regional workshop of UPSRTC (Uttar Pradesh State Road Transport Corporation) located in Saharanpur. The workshop performs maintenance and repair work on roadway passenger vehicles, including parts replacement, lubrication, inspection, and testing. The workshop has several sections dedicated to different vehicle components, such as the engine, differential gear, and clutch sections. The engine section performs maintenance on engine parts like the cylinder head, oil pump, piston, crankshaft, and valves. The differential gear section works on the differential, and the clutch section services clutches.
The document provides information on diesel engine operation and diagnosis. It explains that diesel engines work via compression ignition where fuel is injected into hot compressed air, igniting the fuel. It describes the differences between direct injection and indirect injection diesel engines. It also outlines the key components of diesel engines like the fuel system, injection pump, injectors, turbochargers, and emission control systems. Advantages include torque and fuel economy, while disadvantages include noise, smell and cold starting issues.
Spectrum Technology Solutions was ranked among the top 501 managed service providers globally by Penton Technology's 9th annual MSP 501 ranking and study. The ranking identifies the most progressive IT managed service providers worldwide. Spectrum Technology Solutions' president and CEO Wayne Klug said they are honored to be listed among the top companies and are committed to delivering superior outcomes for customers through innovative technology and practices. The MSP 501 list is based on metrics like recurring revenue, growth, and other factors to recognize top cloud service providers.
The document summarizes the dehydration plant at the Kandhkot Gas Field in Pakistan. The plant removes water and condensate from natural gas produced at the field. It includes slug catchers, scrubbers, filters, absorber towers that use glycol to remove condensate, and a glycol regeneration process. The clean gas is then metered and delivered to customers like WAPDA and SNGPL. Safety processes are in place at the gas wells that feed the plant and a compression station increases pressure before the gas is sent to transmission lines.
Zeebrugge stak Antwerpen in 2014 voorbij als marihuana-havenThierry Debels
Dat er in de havens van ons land drugs gevonden worden, is geen verrassing. Maar uit de recente gegevens van de regering blijkt dat Zeebrugge in 2014 Antwerpen van de troon gestoten heeft wat betreft de inbeslagname van marihuana.
bron: De Kamer
In 2014 werd in Antwerpen 4549 kilogram marihuana aangetroffen. In Zeebrugge ging het om 5000 kilo dat jaar.
This document discusses social citation tools, which allow users to organize references and resources online, share them with others, and see what materials other researchers are reading. Some key social citation tools mentioned include CiteULike, Mendeley, Zotero, and LibraryThing. These tools make it easier to collaborate, find relevant resources, and discover other researchers working in similar areas. The document advises choosing a tool that others in your discipline are using and that works best for your needs and preferences.
This PowerPoint presentation provides an introduction to internet safety and rules for elementary school students. It defines what the internet is, explains how computers connect globally, and discusses common internet activities like searching for information, communicating with friends, watching videos, and online learning. The presentation emphasizes internet safety rules such as being respectful, protecting private information, avoiding strangers, and knowing who to ask for help if anything unsafe occurs online. Key terms like username, password, and personal information are also defined.
Feeding 10 Billion People with Cloud-Scale Compute and AnalyticsJoey Jablonski
Land O'Lakes uses cloud-scale computing and analytics through a data sharing platform called Data Silo to help farmers increase crop yields and feed the world's growing population. By 2050, food production will need to increase 70% to meet demand from a projected global population of 9.2 billion people. Data Silo allows farmers to securely store, share, and analyze precision agriculture data from various sources to improve operations and sustainability. Land O'Lakes developed Data Silo using Google Cloud Platform for its flexibility, scalability, and ability to support geospatial analytics needs.
The document discusses the importance of final year undergraduate projects and provides ideas and suggestions. It recommends using projects as an opportunity to gain hands-on experience with software engineering processes and emerging technologies like machine learning, Big Data, and mobile development. The document provides examples of project ideas involving knowledge management systems, algorithms as a service, clustering algorithms, and building databases. It also discusses strategies for successful project planning and completion, and notes that projects can provide chances to win prizes.
1) Los tumores óseos más frecuentes son el osteoma osteoide, osteoblastoma, tumor de células gigantes, osteosarcoma y sarcoma de Ewing. 2) El osteosarcoma y sarcoma de Ewing predominan en la infancia y adolescencia y son los tumores óseos malignos más comunes. 3) Los factores de riesgo, presentación clínica, diagnóstico, tratamiento y pronóstico varían según el tipo de tumor óseo.
Este documento describe los procesos de procesamiento y presentación de antígenos. Explica que existen dos rutas de procesamiento: la endocítica para antígenos exógenos y la citosólica para antígenos endógenos. Los péptidos resultantes se unen a moléculas MHC de clase I o II y son presentados a las células T. También describe el ensamblaje y estabilización de los complejos MHC-péptido antes de ser expuestos en la superficie celular para su reconocimiento por las cé
La difteria es una enfermedad infecciosa aguda causada por la bacteria Corynebacterium diphtheriae que se caracteriza por la formación de falsas membranas en las vías respiratorias superiores y la piel, lo que puede causar dificultad para respirar. La bacteria produce una toxina que se disemina por el cuerpo y puede dañar diversos órganos. Los grupos más vulnerables son los adultos mayores y los niños menores de 5 años.
Dr. Reddy's Laboratories is an Indian multinational pharmaceutical company founded in 1984 and headquartered in Hyderabad, India. It was founded by Anji Reddy and currently has over 16,000 employees. The company started by producing active pharmaceutical ingredients and launched its first branded drug, Norilet, in 1986. It has since expanded internationally and focuses on both generics and research and development of new drugs. Dr. Reddy's engages in partnerships for research and development and works to provide affordable medicines globally through strategic suppliers. It also focuses on corporate social responsibility programs in education and livelihood advancement.
Ki-Tech Solutions IEEE PROJECTS DEVELOPMENTS WE OFFER IEEE PROJECTS MCA FINAL YEAR STUDENT PROJECTS, ENGINEERING PROJECTS AND TRAINING, PHP PROJECTS, JAVA AND J2EE PROJECTS, ASP.NET PROJECTS, NS2 PROJECTS, MATLAB PROJECTS AND IPT TRAINING IN RAJAPALAYAM, VIRUDHUNAGAR DISTRICTS, AND TAMILNADU. Mail to: kitechsolutions.in@gmail.com
Senior Design Project - B.S. Mechanical Engineering (ITV Research and analysis)Kartik Suvarna
This document outlines the design of an intake throttle valve for a Navistar engine. It discusses the current issues with rapid closure of the throttle valve due to increasing pressure differential. Three concepts are proposed to address this - an orifice plate valve with a hole, an oval shaped valve, and a reduced diameter valve. Calculations of fluid flow and pressure differential would be used to select the best concept to prevent forced closure while meeting performance targets. Testing of a prototype part would then validate the chosen design.
IRJET - Review on Design of Intake Manifold for Air Restricted EngineIRJET Journal
This document reviews the design of intake manifolds for restricted engines used in formula racing events. It discusses several papers that analyzed different intake manifold designs through simulations and testing. The key goals of an intake manifold design are to maximize air flow through the restrictor, evenly distribute air to each cylinder, and improve engine performance metrics like volumetric efficiency and torque. The document examines factors like plenum volume, runner length and geometry, and restrictor shape. Simulation tools like Ricardo WAVE, VECTIS and CFD analysis in ANSYS were used to optimize these design parameters and evaluate manifold designs. The reviewed works aimed to enhance engine power output while meeting the restrictor requirement of racing competitions.
Study of fuel droplets from injector using ansysIRJEETJournal
This document summarizes a study that used computational fluid dynamics (CFD) software to simulate the properties of fuel droplets inside a multi-hole fuel injector nozzle. A 3D model of a multi-hole fuel injector was created in SOLIDWORKS and imported into ANSYS for CFD analysis. The study varied injection pressure and analyzed its effects on atomization. The CFD results provided insight into improving engine emissions and fuel economy by optimizing fuel droplet atomization patterns in the cylinder.
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1. 0
Heath Headley Vu Danh Nicholas Chua
Tommy Harris Ryan Fontenot
DEPARTMENT OF MECHANICAL ENGINEERING
UNIVERSITY OF LOUISIANA AT LAFAYETTE
PROJECT ADVISOR: DR. LULIN JIANG
Flow-Focusing to
Flow-Blurring Fuel
Injector
MCHE 484 SENIOR DESIGN PROJECT
APRIL 28, 2016
2. Executive Summary
This project involved designing and building a fuel injector that is of the continuous flow
type, and employs the flow-blurring concept. Flow-blurring was invented by Dr. Alfonso Gañán-
Calvo. Flow-blurring involves the use of high speed air flow mixing with fuel flow to atomize
and vaporize any given fuel. This is especially useful if one were to be using an unusually high
viscosity fuel like some thick biofuels, as it would effectively vaporize them for more efficient
combustion.
The team designed and built an injector that can be adjusted to operate in both the flow-
blurring and flow-focusing regimes by adjusting the offset distance. The injector parts were 3-D
printed with ABS plastic. The model that was built performed as expected, working well in both
flow-focusing and flow-blurring regimes. Pictures were taken of the spray patterns that resulted
from various air-liquid ratios and later examined.
The approximate spray angle and air-liquid composition of the injector sprays were both
able to be analyzed visually from the photographs that were taken with a Nikon camera mounted
on a tripod. More exact analysis of spray characteristics, for example droplet size, was not possible
to determine from photographs alone. More sophisticated measuring equipment would be
necessary.
4. 1
Introduction
Flow-blurring fuel injectors would be desirable for use in turbine engine applications that
are running on high viscosity biofuels. They can also be quickly adjusted to operate in the flow-
focusing regime, if desired. High viscosity fuels are not as quick to vaporize as more conventional
fuels like gasoline. A common automotive injector can simply spray gasoline into a combustion
chamber to vaporize and mix with the incoming air quite readily. A thicker fuel is not as easily
vaporized by conventional injectors. This is one way a flow-blurring injector can be useful. When
certain geometrical and flow conditions are met within the injector nozzle and around the exit
orifice, a flow-blurring injector that is operating in the flow-blurring regime can effectively
vaporize even the thickest of fuels, which allows easy mixing with intake air so that efficient
combustion can be achieved.
5. 2
Project Objectives
Design unique flow-focusing to flow-blurring fuel injector using Solidworks
3-D print design
Install leak-proof and reliable fuel and air connections
Set up test lab with all necessary equipment
Outline experiment plan for relating spray characteristics to ALR (air-liquid ratio) and
H/D ratio (offset distance to fuel feed tube diameter ratio)
Conduct experiments and collect desired data
Organize data into neat and presentable form
Discuss what has been learned from the experiments
6. 3
Section I
Project Constraints
In this context, project constraints are defined as limitations that prevent the design from
becoming the best it can be. These will include time, cost, and material constraints, among others.
The constraints for this project are as follows:
Material Constraints:
The material is limited to 3-D printable plastic like PLA or ABS.
Size Constraints:
The size of the full assembly must be as small as practicable, while still allowing
installation of a 1/16” NPT compression fitting for liquid and a 3/8” NPT air hose adapter.
Financial Constraints:
An arbitrary budget limit of $500 was set by Dr. Jiang. The Cole-Parmer liquid pump was
$2400 and specifically purchased by Dr. Jiang, so the budget was not affected by this purchase.
Time Constraints:
Approximately 13 weeks was available from the start of project to final presentation on
April 28, 2016.
7. 4
Section II
Background Research
The three main factors for producing a better spray pattern are maximized surface
production, minimized droplet coalescence, and minimized gas expense. All of these are increased
by a new atomization technique called flow-blurring atomization. Flow-blurring atomization was
a concept which was first conceptualized by Dr. Alfonso Gañán-Calvo, a fluid mechanics professor
at the University of Seville in Spain. It was Gañán-Calvo’s idea to create an atomizer that is simple
yet effective. His concept takes advantage of turbulent gas currents in order to create a more
efficient atomization of liquid. In his studies, he observed that at a certain height to diameter ratio,
a backflow of gas is introduced into the fluid stream which acts to break up the fluid. When the
ratio, Ψ= H/D, is greater than 0.25, a pattern termed flow-focusing spray is observed. This pattern
is characterized by a micro-jet, which either can break up in a symmetric or asymmetric pattern
depending on the Weber number. When this ratio Ψ is less than or equal to 0.25, a turbulent
backflow can be observed. Dr. Gañán-Calvo refers to this as flow-blurring. This phenomenon
increases the surface of spray up to fifty times more than standard plain-jet air blast type atomizers
which observe flow-focusing spray. A model of this design can be seen below in Figure 1.
8. 5
Figure 1: Schematic of the Simple Nozzle Geometry Used
One of the advantages of this design is that the effects of viscosity become negligible. This
means that this atomizer can be applied to a variety of fluids and that the material used for
constructing the model is also able to be varied.
9. 6
Section III
Design Process
III.1 Design Criteria
Design criteria are guidelines or rules that must be met when designing the models. The
design criteria for this fuel injector were communicated verbally by the team’s advisor, Dr. Jiang.
Requirements for a flow-blurring injector were also outlined by Dr. Gañán-Calvo in his paper. 1
These criteria are as follows:
Offset distance (H) must be adjustable, so that H/D can be varied
Fuel feed tube diameter (D) must be either adjustable or interchangeable
Injector nozzle must attach to some sort of holder, so that fuel and air lines can be
connected
All parts must be 3-D printable
Exit orifice diameter must equal fuel feed tube diameter
1
Gañán-Calvo,Alfonso. Enhanced Liquid Atomization: From flow-focusing to flow-blurring.
Applied Physics Papers 86 2005
10. 7
III.2 Design Evaluation Process
Several models were designed over the course of three months. Once the team outlined
the design criteria and constraints, ideas were brainstormed and then modeled with Solidworks.
Going with the advice of the team’s advisor and client, Dr. Jiang, small changes were made with
each iteration. The ultimate goal was to produce an injector that was suitable for use in a small
turbine engine. Once this final design was satisfactory, it was 3-D printed by Idea Zoo, a company
that specializes in producing parts from CAD designs. Figure 2 shows a morphological chart that
helped with design selection.
Figure 2. Morphological chart
11. 8
III.3 Designs Created
Here, several versions of the injector design are shown as it evolved. Figure 2 shows the
first idea of the injector model.
Figure 3. First idea
12. 9
This first idea was modified to decrease the size and increase the wall thickness of the outer
shell that holds air pressure.
After more team brainstorming sessions and spending more hours into putting these ideas
into Solidworks, an injector holder was designed as well as a new exit orifice cap. These early
ideas are shown in Figures 4, 5, and 6 below.
Figure 4. First exit orifice cap design
15. 12
After consulting with Dr. Jiang, she suggested we make the parts even smaller and modify
the fuel feed tube. This resulted in the design shown in Figures 7 and 8.
Figure 7. Injector holder
17. 14
Further modifications were made to this design so that fuel and air attachments could be
installed on the injector holder. This resulted in the design that was 3-D printed, tested, and is still
in use today. This design is shown in Figures 9 and 10.
Figure 9. 3-D printed design
19. 16
Section IV
Final Design Details
IV.1 Design Testing and Results
IV.1.A Equipment used:
Cole-Parmer water Pump
Air compressor
Air flow meter with stand
Test stand
Nikon D3100 camera
IV.1.B Testing Procedure
Water is used for liquid and air is used for gas in this experiment. To find the relationship
between Air-Liquid ratio (ALR) and spray angle for each H/D ratio, air flow rate is fixed at 1
SCFM while liquid flow rate is increased from 20 mL/min to 240 mL/min with 20mL/min
increments. This is repeated for two H/D ratios of 0.19 and 0.375. Images of each spray for every
set of conditions were captured with the Nikon digital camera.
22. 19
Graph 3: Flow-focusing regime
The spray angle was measured from the images captured during experimentation. This
was accomplished by using the computer program ImageJ, which has the ability to determine
angles referenced in images. The angles were then plugged into an Excel spreadsheet according
to the GLR which they were tested at. From this Graphs 1-3 above were produced.
Upon observation of the graphs, it appears that as ALR (GLR) increases, the spray angle
decreases. A smaller spray angle correlates to smaller liquid droplets, because larger droplets have
a larger momentum and are thus more likely to escape from the center of the exit orifice. This is
what we would intuitively expect. The air mass flow rate was determined from a flow meter and
recorded. The liquid flow rate was read and recorded from the pump directly.
23. 20
IV.2 Cost Analysis
Table 1: Price List
Total Price: $2900
Each member of the group of five students spent at least 5 hours a week to
work on this project, totaling 65 hours each.
24. 21
IV.3 Conclusions
The team took about six weeks to design a fuel injector with Solidworks that would be
reliable and satisfactory for testing purposes. This final design was 3-D printed by a private
company, Idea Zoo. The cost to make all the fuel injector parts of ABS plastic was $20.
The test lab was set up with an air compressor, which Heath Headley brought from
home. Dr. Jiang bought a Cole-Parmer liquid pump that accurately delivers a desired flow rate.
A test stand was bought that holds the injector during experiments. Dr. Jiang also supplied an air
flow meter that was later attached to a wooden stand.
An experiment plan was outlined. It was desired to relate ALR and H/D to the resulting
spray pattern. Pictures were taken with Heath’s camera, and these pictures were matched with
their respective ALR and H/D values.
When the injector was tested in the flow-blurring regime (H/D=0.19) with an ALR around
1.0-1.5, the water spray appears to fully vaporize with a small spray angle. When the ALR is
around 0.3-0.7, it is clear to see a small micro-jet with a wider spray angle, presumably because
the exit velocity of the air-water mixture is lower. This would indicate a higher droplet size, and
incomplete vaporization. We can conclude from this that a higher ALR is more desirable. An
ALR>1 would be ideal.
25. 22
The injector was also tested in the flow-focusing regime, with H/D=0.38. With a low ALR
of around 0.3-0.7, the liquid micro-jet is clearly visible. With a higher ALR, the micro-jet is still
visible but smaller, and the spray angle is smaller because the exit velocity is higher.
We can conclude that this injector operates as expected when in the flow-blurring mode by
completely vaporizing the water that running through it. If there were more time, it would be
interesting to conduct more precise experiments with more sophisticated equipment. For instance,
we would like to test many values of ALR, while taking pictures with a camera that is fixed in
place. It would also be desirable to measure the droplet size directly, and then produce a graph of
droplet size vs. ALR. It is also possible that this design could be used in a turbine engine if it were
made of steel. This might be feasible if a few small changes were made to the design, so that it
could be made with a lathe and milling machine.
35. 32
Appendix C
Parts List
Swagelok compression fitting Part #: SS-400-1-1
3/8” NPT air hose adapter got from home
¼” OD fuel hose Guidry Hardware
Two air hoses one from home, one bought from Wal-Mart
3-D printed parts Idea Zoo