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Question: an aircraft cruises at m 082 at an altitude of...

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An aircraft cruises at M 0.82 at an altitude of 33,000 ft. If the average jet velocity relative to the engine (76.0%) is 400 m/s, calculate the propulsive efficiency neglecting the mass flow rate of the fuel. Calculate the overall and thermodynamic efficiency of the engine if the SFC is 1.65 x 105 kg sN1 and (34.5%, 45.4%) the LCV of the fuel is 43 MJ/k K If the fuel/air ratio in the combustion chamber is 0.02, repeat the calculation of propulsive efficiency (77.4%) taking account of the mass flow rate of fuel. Assume the engine is a turbojet. k Determine the propulsive efficiency for an engine with a bypass ratio of 5:1. Assume the relative speeds of the bypass and core flows are 350 and 400 m/s, respectively, and neglect the mass flow rate of the (80.8%) fuel.D
Un-245 am/s
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