1. What component was the most difficult for Frank Whittle to design in his first engine?...
1. What component was the most difficult for Frank Whittle to design in his first engine?
a. combustor b. turbine c. diffuser d. compressor
2. Which of the following would not be classified as a jet engine?
a. turboshaft and rocket b. turbojet and turbofan c. ramjet and pulsejet d. turboprop and turboshaft
3. Which of the following aircraft engines would be best for a mach 2 airplane?
a. low bypass turbofan b. high bypass turbofan c. turbojet d. ultra low bypass turbofan
Homework Answers
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1. What component was the most difficult for Frank Whittle to
design in his first engine?...
A turbojet engine consists of a diffuser, compressor, combustor, turbine and a converging nozzle. The engine...
A turbojet engine consists of a diffuser, compressor, combustor, turbine and a converging nozzle. The engine is operating on an aircraft flying at 260 m/s at an altitude where the air is at 61 kPa and -11 °C. The inlet diameter of this engine is 1.6 m; the thrust produced by the engine under ideal cruising conditions is 93,625 N; and the temperature at the turbine inlet is 750 °C. Assume constant specific heat values at room temperature, choked flow...
please solve h to m .A-7 The gas turbine engines that are used on a military...
please solve h to m
.A-7 The gas turbine engines that are used on a military jet air plane likely consists of a diffuser, compressor, combustor, turbine, afterburmer, and nozzle that are arranged in series as shown in Figure 4.A-7(a) and flying with a velocity of 350 mph. The analysis will be carried out on a component-by component basis. Model the air as an ideal gas and assume that it has constant c and cp R 287.1 Ikg-K and c-1005...
2. An aircraft with a single turbojet engine (with an inlet area of 1 m2) is...
2. An aircraft with a single turbojet engine (with an inlet area of 1 m2) is flying at cruising condition with a flight Mach number of 0.7. The ambient temperature and pressure are 250 K and 100 kPa, respectively. The engine compressor pressure ratio is 12, and the turbine inlet temperature is 1200 K. Assume all mechanical components are operating at isentropic condition and the specific heat can be considered a constant (throughout the entire engine) of 1 kJ/(kg K)....
Problem-2 (200) Air at 30 kPa, 200 K, and 250 m/s enters a turbojet engine in...
Problem-2 (200) Air at 30 kPa, 200 K, and 250 m/s enters a turbojet engine in flight. The air mass flow rate is 28 kg/s. The compressor pressure ratio is 13, the turbine inlet temperature is 1460 K, and air exits the nozzle at 30 kPa. The diffuser and nozzle processes are isentropic, the compressor and turbine have isentropic efficiencies of 81% and 88%, respectively, and there is no pressure drop for flow through the combustor. Kinetic energy is negligible...
. A turbofan aircraft engine is flying at 720 km/h at an altitude of 6100 m,...
. A turbofan aircraft engine is flying at 720 km/h at an altitude of 6100 m, where the ambient conditions are 50 kPa and -12°C (a negative value). The pressure ratio across the compressor is 13, and the turbine inlet temperature (TIT) is 1330 K. Assuming ideal operation for all components and constant specific heats for the air at room temperature (cold air model). (a) Sketch the T-s diagram of the cycle, and determine: (b) The Mach number of the...
Quantitative: In the 1950s liquid hydrogen was considered as a fuel for a new type of...
Quantitative: In the 1950s liquid hydrogen was considered as a fuel for a new type of aircraft being developed, the SR-71 Blackbird (shown in Figure 1). Figure 1: The SR-71 Blackbird Early research on the project focused on which fuel to use for the Blackbird. Pratt & Whitney had a J-57 engine that was designed for kerosene and being considered for implementation on the Blackbird. The J-57 only took 5 months to convert to running on liquid hydrogen, however tests...
1. A 12-cylinder, 4-stroke automobile engine is being designed. What type of cylinder arrangement would you...
1. A 12-cylinder, 4-stroke automobile engine is being designed. What type of cylinder arrangement would you recommend? (a) In-Line (b) V-Type (c) W-Type (d) Rotary. 2. The expression "cylinder cut-out" means : (a) Half of cylinder volumes is used. (b) Half of cylinder numbers is used. (c) Half of cylinder masses is used. (d) None of the above. 3. Adding lubrication oil to the inlet fuel- air mixture in 2-st engines will increase: (a) HC emissions. (b) CO emissions (c)...
1. VTOL Engine Forces A propulsion system for a newP VTOL (vertical takeoff and landing) aircraft...
1. VTOL Engine Forces A propulsion system for a newP VTOL (vertical takeoff and landing) aircraft is being tested. i The design is a basic turbojet AP with the geometry shown in the P figure to the right. The engine is mounted on a pod in a test cell that keeps the engine stationary by exerting the necessary reaction forces to balance the forces generated by the engine. Gas turbine Pe PeTe The test cell provides air to the engine...
The Boeing 747 has a cruising altitude of 45,000 feet and cruising speed of 275 m/s....
The Boeing 747 has a cruising altitude of 45,000 feet and
cruising speed of 275 m/s. At this elevation, the temperature and
pressure according to the US Standard Atmosphere (air properties as
a function of altitude) are 220K and 1.8x104 Pa, respectively. The
engines are steady state devices that can be modeled using the 1st
Law of Thermodynamics with air (ideal gas) as the working fluid
undergoing several processes.
a. The inlet area of the engines is 0.5 m2. What...
Question 1 What is the world's most important continuously working prime mover? A) diesel engine B)...
Question 1 What is the world's most important continuously working prime mover? A) diesel engine B) jet engine. C) steam turbine D) I have no idea. E) electric vehicle Question 2 Who was a great promoter of ethanol, and his famous Model T could run on gasoline, ethanol, or a mixture of the two fuels? A) Henry Ford B) Steve Jobs C) William Durant D) Todd Sneller E) Charles Duriya Question 3 Which country was the first serious entry into...
A turbojet engine consists of a diffuser, compressor, combustor, turbine and a converging nozzle. The engine is operating on an aircraft flying at 260 m/s at an altitude where the air is at 61 kPa and -11 °C. The inlet diameter of this engine is 1.6 m; the thrust produced by the engine under ideal cruising conditions is 93,625 N; and the temperature at the turbine inlet is 750 °C. Assume constant specific heat values at room temperature, choked flow...
please solve h to m
.A-7 The gas turbine engines that are used on a military jet air plane likely consists of a diffuser, compressor, combustor, turbine, afterburmer, and nozzle that are arranged in series as shown in Figure 4.A-7(a) and flying with a velocity of 350 mph. The analysis will be carried out on a component-by component basis. Model the air as an ideal gas and assume that it has constant c and cp R 287.1 Ikg-K and c-1005...
2. An aircraft with a single turbojet engine (with an inlet area of 1 m2) is flying at cruising condition with a flight Mach number of 0.7. The ambient temperature and pressure are 250 K and 100 kPa, respectively. The engine compressor pressure ratio is 12, and the turbine inlet temperature is 1200 K. Assume all mechanical components are operating at isentropic condition and the specific heat can be considered a constant (throughout the entire engine) of 1 kJ/(kg K)....
Problem-2 (200) Air at 30 kPa, 200 K, and 250 m/s enters a turbojet engine in flight. The air mass flow rate is 28 kg/s. The compressor pressure ratio is 13, the turbine inlet temperature is 1460 K, and air exits the nozzle at 30 kPa. The diffuser and nozzle processes are isentropic, the compressor and turbine have isentropic efficiencies of 81% and 88%, respectively, and there is no pressure drop for flow through the combustor. Kinetic energy is negligible...
Quantitative: In the 1950s liquid hydrogen was considered as a fuel for a new type of aircraft being developed, the SR-71 Blackbird (shown in Figure 1). Figure 1: The SR-71 Blackbird Early research on the project focused on which fuel to use for the Blackbird. Pratt & Whitney had a J-57 engine that was designed for kerosene and being considered for implementation on the Blackbird. The J-57 only took 5 months to convert to running on liquid hydrogen, however tests...
1. A 12-cylinder, 4-stroke automobile engine is being designed. What type of cylinder arrangement would you recommend? (a) In-Line (b) V-Type (c) W-Type (d) Rotary. 2. The expression "cylinder cut-out" means : (a) Half of cylinder volumes is used. (b) Half of cylinder numbers is used. (c) Half of cylinder masses is used. (d) None of the above. 3. Adding lubrication oil to the inlet fuel- air mixture in 2-st engines will increase: (a) HC emissions. (b) CO emissions (c)...
1. VTOL Engine Forces A propulsion system for a newP VTOL (vertical takeoff and landing) aircraft is being tested. i The design is a basic turbojet AP with the geometry shown in the P figure to the right. The engine is mounted on a pod in a test cell that keeps the engine stationary by exerting the necessary reaction forces to balance the forces generated by the engine. Gas turbine Pe PeTe The test cell provides air to the engine...
The Boeing 747 has a cruising altitude of 45,000 feet and
cruising speed of 275 m/s. At this elevation, the temperature and
pressure according to the US Standard Atmosphere (air properties as
a function of altitude) are 220K and 1.8x104 Pa, respectively. The
engines are steady state devices that can be modeled using the 1st
Law of Thermodynamics with air (ideal gas) as the working fluid
undergoing several processes.
a. The inlet area of the engines is 0.5 m2. What...
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