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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.

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
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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