An aircraft with a turbojet engine flies at 260.8 m/s. The engine burns fuel with a heating value of 49.6 MJ/kg, and its propulsive efficiency is 0.43%. If the fuel-air mass fraction of the engine is 0.5% (i.e., for every kg of working fluid passing through the engine, 0.005 kg of fuel is burned), determine the velocity of the working fluid in the exhaust to the nearest m/s. As an initial step, you may find it helpful to express the propulsive work and heat in terms of the mass flow rate of working fluid.
An aircraft with a turbojet engine flies at 260.8 m/s. The engine burns fuel with a heating value of 49.6 MJ/kg, and its propulsive efficiency is 0.43%. If the fuel-air mass fraction of the engine is 0.5% (i.e., for every kg of working fluid passing through the engine, 0.005 kg of fuel is burned), determine the velocity of the working fluid in the exhaust to the nearest m/s. As an initial step, you may find it helpful to express the propulsive work and heat in terms of the mass flow rate of working fluid.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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An aircraft with a turbojet engine flies at 260.8 m/s. The engine burns fuel with a heating value of 49.6 MJ/kg, and its propulsive efficiency is 0.43%. If the fuel-air mass fraction of the engine is 0.5% (i.e., for every kg of working fluid passing through the engine, 0.005 kg of fuel is burned), determine the velocity of the working fluid in the exhaust to the nearest m/s. As an initial step, you may find it helpful to express the propulsive work and heat in terms of the mass flow rate of working fluid.
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