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An aircraft engine operates on a simple ideal Brayton cycle with a pressure ratio of 12....
An aircraft engine operates on a simple ideal Brayton cycle with a pressure ratio of 14.2....
An aircraft engine operates on a simple ideal Brayton cycle with a pressure ratio of 14.2. Heat is added to the cycle at a rate of450 kW; air passes through the engine at a rate of 1.20 kg/s; and the air at the beginning of the compression is at70 kPa and 0°C. Determine the power produced by this engine and its thermal efficiency. Use constant specific heats at room temperature. Wnet kW Round your final answer to one decimal place....
An aircraft engine operates on a simple ideal Brayton cycle with a pressure ratio rp of...
An aircraft engine operates on a simple ideal Brayton cycle with
a pressure ratio rp of 9. Heat is added to the cycle at a rate of
490 kW; air passes through the engine at a rate of 1.1 kg/s; and
the air at the beginning of the compression is at P1 = 71 kPa and
T1 = 0 oC. Use constant specific heats at room temperature. The
properties of air at room temperature are cp =1.005 kJ/kg.K and k...
4. An Ideal diesel engine has a compression ratio of 20 and uses air as the...
4. An Ideal diesel engine has a compression ratio of 20 and uses air as the working fluid. The state of air at the beginning of the compression process is 95kPa and 20°C. If the maximum temperature in the cycle is not to exceed 2200K, determine a) the thermal efficiency and b) the mean effective pressure. Assume constant specific heats for air at room temperature. 5. An aircraft engine operates on a simple ideal Brayton cycle with a pressure ratio...
Problem 7: (15 pts) An ideal air-standard Brayton cycle operates steadily with pressure limits of the...
Problem 7: (15 pts) An ideal air-standard Brayton cycle operates steadily with pressure limits of the cycle are 100 kPa and 800 kPa. The temperature at the exit of turbine is 500 K. During the heat rejection process, heat is released from the cycle at a rate of 320 kW and the mass flow rate is 2 kg/s. The air is treated as an ideal gas with constant specific heats, i.e. k = 1.4 and R = 0.287 kJ/(kg ·...
4. A4.6 L spark ignition engine operates on the ideal Otto cycle with a compression ratio of 10. At the beginning of the compression process the air is at 107 kPa and 21 C. The maximum cycle temp...
4. A4.6 L spark ignition engine operates on the ideal Otto cycle with a compression ratio of 10. At the beginning of the compression process the air is at 107 kPa and 21 C. The maximum cycle temperature is 1116°C. Accounting for variable specific heats, determine: (a) the heat addition per cycle in kJ. Ans: 3.368 kJ (b) the net work per cycle in kJ. Ans: 1.907 kJ (c) the mean effective pressure in kPa. Ans: 460.6 kPa (d) the...
3. Exhaust Velocity A jet engine that operates on Brayton cycle is at an altitude (30,000...
3. Exhaust Velocity A jet engine that operates on Brayton cycle is at an altitude (30,000 ft) where the engine entrance temperature is 228 K and the pressure is 30.8 kPa. We also know that the engine compressor pressure ratio is rp= 10 and the fuel to air mass flowrate ratio is 0.03. If the aircraft is moving at a velocity of 305 m/s and uses fuel with LHV 44,102 kJ/kg calculate the engine exhaust velocity. (Note that cp 1.0035...
A Brayton cycle operates in air with a pressure ratio of 10. All components are ideal....
A Brayton cycle operates in air with a pressure ratio of 10. All components are ideal. The temperature at the inlet to the compressor is 400 K and the temperature at the inlet to the turbine is 2000 K. The kinetic energy at the inlet and exit of all components can be neglected. Assume that the working fluid has a constant cp=1000 J/kgK, and a specific ration of gamma=4. What is the compression work per unit mass? What is the...
A simple ideal Brayton cycle has a pressure ratio of 6. The working fluid enters the...
A simple ideal Brayton cycle has a pressure ratio of 6. The working fluid enters the compressor at a pressure of 100 kPa and a temperature of 300 K. The temperature at the end of the combustion process is 1273 K. Applying the cold air-standard assumption: a) Draw the P-v and T-s process diagrams for the cycle. b) Calculate the specific compressor and turbine work. c) Determine the thermal efficiency of the cycle.
24-1: The net power produced by an air-standard Brayton cycle is 1500 kW. The pressure ratio for ...
24-1: The net power produced by an air-standard Brayton cycle is 1500 kW. The pressure ratio for the cycle is 12 and the minimum and maximum temperatures are 20˚C and 1450˚C respectively. The isentropic efficiencies of the compressor and turbine are 0.75 and 0.80 respectively. Assume an ambient pressure of 100 kPa. Determine: a. The thermal efficiency of the cycle b. The mass flow rate of the air, in kg/s. c. The heat added during the combustion process, in kW....
(12 points) An ideal Otto cycle operates with a compression ratio of 10. At the beginning...
(12 points) An ideal Otto cycle operates with a compression ratio of 10. At the beginning of the compression process, the air is at 101 kPa and 27°C. During the constant volume heat addition process, 790 kJ/kg of heat is transferred to the air. Accounting for variable specific heats with temperature, determine: the maximum temperature during the cycle 1266.862 °C the maximum pressure during the cycle 6239.424 kPa the specific net work output 475.495481 kJ/kg the mean effective pressure (MEP)...
An aircraft engine operates on a simple ideal Brayton cycle with a pressure ratio of 14.2. Heat is added to the cycle at a rate of450 kW; air passes through the engine at a rate of 1.20 kg/s; and the air at the beginning of the compression is at70 kPa and 0°C. Determine the power produced by this engine and its thermal efficiency. Use constant specific heats at room temperature. Wnet kW Round your final answer to one decimal place....
An aircraft engine operates on a simple ideal Brayton cycle with
a pressure ratio rp of 9. Heat is added to the cycle at a rate of
490 kW; air passes through the engine at a rate of 1.1 kg/s; and
the air at the beginning of the compression is at P1 = 71 kPa and
T1 = 0 oC. Use constant specific heats at room temperature. The
properties of air at room temperature are cp =1.005 kJ/kg.K and k...
4. An Ideal diesel engine has a compression ratio of 20 and uses air as the working fluid. The state of air at the beginning of the compression process is 95kPa and 20°C. If the maximum temperature in the cycle is not to exceed 2200K, determine a) the thermal efficiency and b) the mean effective pressure. Assume constant specific heats for air at room temperature. 5. An aircraft engine operates on a simple ideal Brayton cycle with a pressure ratio...
Problem 7: (15 pts) An ideal air-standard Brayton cycle operates steadily with pressure limits of the cycle are 100 kPa and 800 kPa. The temperature at the exit of turbine is 500 K. During the heat rejection process, heat is released from the cycle at a rate of 320 kW and the mass flow rate is 2 kg/s. The air is treated as an ideal gas with constant specific heats, i.e. k = 1.4 and R = 0.287 kJ/(kg ·...
4. A4.6 L spark ignition engine operates on the ideal Otto cycle with a compression ratio of 10. At the beginning of the compression process the air is at 107 kPa and 21 C. The maximum cycle temperature is 1116°C. Accounting for variable specific heats, determine: (a) the heat addition per cycle in kJ. Ans: 3.368 kJ (b) the net work per cycle in kJ. Ans: 1.907 kJ (c) the mean effective pressure in kPa. Ans: 460.6 kPa (d) the...
3. Exhaust Velocity A jet engine that operates on Brayton cycle is at an altitude (30,000 ft) where the engine entrance temperature is 228 K and the pressure is 30.8 kPa. We also know that the engine compressor pressure ratio is rp= 10 and the fuel to air mass flowrate ratio is 0.03. If the aircraft is moving at a velocity of 305 m/s and uses fuel with LHV 44,102 kJ/kg calculate the engine exhaust velocity. (Note that cp 1.0035...
(12 points) An ideal Otto cycle operates with a compression ratio of 10. At the beginning of the compression process, the air is at 101 kPa and 27°C. During the constant volume heat addition process, 790 kJ/kg of heat is transferred to the air. Accounting for variable specific heats with temperature, determine: the maximum temperature during the cycle 1266.862 °C the maximum pressure during the cycle 6239.424 kPa the specific net work output 475.495481 kJ/kg the mean effective pressure (MEP)...
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