Air enters a nozzle in a jet engine at a pressure of 500 kPa, temperature of...
Air enters a nozzle in a jet engine at a pressure of 500 kPa, temperature of 650K, and velocity of 75 m/s. The air exits the nozzle at a pressure of 100 kPa, and the isentropic nozzle efficiency is 82%.
a). Determine the velocity of the air at the nozzle exit.
b). Determine the rate of entropy generation in the nozzle per kg of air flowing in kW/kgK
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Air enters a nozzle in a jet engine at a pressure of 500 kPa,
temperature of...
Air enters an adiabatic nozzle at 500 kPa and a temperature of 200 °C with a...
Air enters an adiabatic nozzle at 500 kPa and a temperature of 200 °C with a velocity of 100 m/s. It exits the nozzle at a pressure of 100 kPa. Assuming that the expansion through the nozzle occurs reversibly, determine (a) the exit temperature and (b) the exit velocity of the air. The specific heats of air can be assumed to be constant with Cv = 0.742 kJ/kg oC and Cp = 1.029 kJ/kg oC.
Argon enters an insulated nozzle at 280 kPa, 1300 K, 10 m/s and exits at 645...
Argon enters an insulated nozzle at 280 kPa, 1300 K, 10 m/s and exits at 645 m/s. Assume argon is an ideal gas and has a constant specific heat. Determine a) The exit temperature of the argon under the actual process (K). b) The ideal exit temperature of the argon (K) under the isentropic process if the isentropic efficiency of the nozzle is 90 percent. c) The exit pressure of the argon (kPa). d) The amount of specific entropy generation...
2. Air enters an adiabatic nozzle with a pressure, temperature, and velocity of 900 kPa 500°C, an...
2. Air enters an adiabatic nozzle with a pressure, temperature, and velocity of 900 kPa 500°C, and 2.8 m/s, respectively. The air leaves the nozzle at 850 kPa and 480°C. What is the velocity at the exit of the nozzle? Ans 208.949 m/s
2. Air enters an adiabatic nozzle with a pressure, temperature, and velocity of 900 kPa 500°C, and 2.8 m/s, respectively. The air leaves the nozzle at 850 kPa and 480°C. What is the velocity at the exit...
The diffuser in a jet engine is designed to decrease the kinetic energy of the air entering the j...
The diffuser in a jet engine is designed to decrease the kinetic energy of the air entering the jet engine compressor without any work or heat interactions. Following information is recorded; Entering diffuser Velocity = 500 ms Pressure 100 kPa Temperature 20°0 The exit of a diffuser Velocity- 329.55 m/s Pressure 200 kPa Temperature- 90°0 The molecular mass of air = 28.96 kg/kmol Note for air, Cp/R-A+BT+CT2+DT2 ET3 with T in Kelvin Name Air B*103 0.575 D*10-5 0.016 C*106 E*109...
Q.4 Air at 26 kPa,230 K, and 220 m/s enters a turbojet engine in flight as...
Q.4 Air at 26 kPa,230 K, and 220 m/s enters a turbojet engine in flight as shown below. The mass flow rate of air is 25 kg/s, the compression pressure ratio is 11, inlet temperature to the turbine is 1400 K, and air exits the nozzle at 26 kPa. The diffuser and nozzle processes are isentropic, but the compressor and turbine have isentropic efficiencies of 85 and 90 percent, respectively and there is no pressure drop for flow through the...
Problem 4 Steam enters a nozzle at 500°C and 500 kPa with a velocity of 15...
Problem 4 Steam enters a nozzle at 500°C and 500 kPa with a velocity of 15 m/s; it exits the nozzle at 200°C and 100 kPa while losing heat at a rate of 30 kW. Given that the mass flow rate of the steam is 1.688 kg/s, determine the velocity of the steam at the nozzle exit.
Air with a stagnation pressure of 1000 kPa and stagnation temperature of 500 K flows isentropically into a 100 kPA ambient (back) pressure. Calculate the Area ratio at the exit of a nozzle for isentro...
Air with a stagnation pressure of 1000 kPa and stagnation temperature of 500 K flows isentropically into a 100 kPA ambient (back) pressure. Calculate the Area ratio at the exit of a nozzle for isentropic flow with these conditions. Further if flow is considered isentropic within the nozzle calculate the isentropic nozzle efficiency if the area ratio at the nozzle exit were 1.2 rather than your calculated value for isentropic exit conditions above.
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...
NO INTERPOLATION REQUIRED Air enters an adiabatic turbine at 1000 kPa and 1625 degrees C (state...
NO INTERPOLATION REQUIRED Air enters an adiabatic turbine at 1000 kPa and 1625 degrees C (state 1) with a mass flow rate of 5 kg/s and leaves at 100 kPa the isentropic efficiency of the turbine is 85%. Neglecting the kinetic energy change of the steam, and considering variable specific heats, determine: a. the isentropic power of the turbine Isentropic power in kW b. the temperature at the turbine exit temperature at exit in degrees C c. the actual power...
6. Refrigerant-134a enters an adiabatic compressor as saturated vapor at 100 kPa at a rate of...
6. Refrigerant-134a enters an adiabatic compressor as saturated vapor at 100 kPa at a rate of 0.7 m3/min and exits at 1 MPa pressure. If the isentropic efficiency of the compressor is 87%, determine (a) the temperature of the refrigerant at the exit of the compressor, (b) the power input (in kW), and (c) the rate of entropy generation during this process.
2. Air enters an adiabatic nozzle with a pressure, temperature, and velocity of 900 kPa 500°C, and 2.8 m/s, respectively. The air leaves the nozzle at 850 kPa and 480°C. What is the velocity at the exit of the nozzle? Ans 208.949 m/s
2. Air enters an adiabatic nozzle with a pressure, temperature, and velocity of 900 kPa 500°C, and 2.8 m/s, respectively. The air leaves the nozzle at 850 kPa and 480°C. What is the velocity at the exit...
The diffuser in a jet engine is designed to decrease the kinetic energy of the air entering the jet engine compressor without any work or heat interactions. Following information is recorded; Entering diffuser Velocity = 500 ms Pressure 100 kPa Temperature 20°0 The exit of a diffuser Velocity- 329.55 m/s Pressure 200 kPa Temperature- 90°0 The molecular mass of air = 28.96 kg/kmol Note for air, Cp/R-A+BT+CT2+DT2 ET3 with T in Kelvin Name Air B*103 0.575 D*10-5 0.016 C*106 E*109...
Q.4 Air at 26 kPa,230 K, and 220 m/s enters a turbojet engine in flight as shown below. The mass flow rate of air is 25 kg/s, the compression pressure ratio is 11, inlet temperature to the turbine is 1400 K, and air exits the nozzle at 26 kPa. The diffuser and nozzle processes are isentropic, but the compressor and turbine have isentropic efficiencies of 85 and 90 percent, respectively and there is no pressure drop for flow through the...
Problem 4 Steam enters a nozzle at 500°C and 500 kPa with a velocity of 15 m/s; it exits the nozzle at 200°C and 100 kPa while losing heat at a rate of 30 kW. Given that the mass flow rate of the steam is 1.688 kg/s, determine the velocity of the steam at the nozzle exit.
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...
6. Refrigerant-134a enters an adiabatic compressor as saturated vapor at 100 kPa at a rate of 0.7 m3/min and exits at 1 MPa pressure. If the isentropic efficiency of the compressor is 87%, determine (a) the temperature of the refrigerant at the exit of the compressor, (b) the power input (in kW), and (c) the rate of entropy generation during this process.
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