An aircraft is flying at a cruising speed of 0.07 mph at an altitude of 5.0 km where the atmospheric pressure is 54.05 kPa and the ambient air temperature is 0.59 °F. The ambient air is first decelerated in a diffuser before it enters the compressor. Assuming both the diffuser and the compressor to be isentropic, determine (a) the stagnation pressure at the compressor inlet and (b) the required compressor work per unit mass if the stagnation pressure ratio of the compressor is 12. Cp of air is 1.005 kJ/kg K, k=1.4. Diffuser 1 1 01 02 Compressor Aircraft engine

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An aircraft is flying at a cruising speed of 0.07 mph at an altitude of 5.0 km where the atmospheric pressure
is 54.05 kPa and the ambient air temperature is 0.59 °F. The ambient air is first decelerated in a diffuser
before it enters the compressor. Assuming both the diffuser and the compressor to be isentropic,
determine (a) the stagnation pressure at the compressor inlet and (b) the required compressor work per
unit mass if the stagnation pressure ratio of the compressor is 12. Cp of air is 1.005 kJ/ kg K, k=1.4.
Diffuser
1 01
02
Compressor
Aircraft
engine
Transcribed Image Text:An aircraft is flying at a cruising speed of 0.07 mph at an altitude of 5.0 km where the atmospheric pressure is 54.05 kPa and the ambient air temperature is 0.59 °F. The ambient air is first decelerated in a diffuser before it enters the compressor. Assuming both the diffuser and the compressor to be isentropic, determine (a) the stagnation pressure at the compressor inlet and (b) the required compressor work per unit mass if the stagnation pressure ratio of the compressor is 12. Cp of air is 1.005 kJ/ kg K, k=1.4. Diffuser 1 01 02 Compressor Aircraft engine
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