General Electric J79-GE-15 turbojet engine is one of two propelling a McDonnell F4C airplane is powered by two General Electric J79-GE-15 turbojet engines. F4C has the following characteristics: wing area S=49 m², engine inlet area A=0.6 m², cruise Mach number M,=0.82, and flight altitude of 9144 m. The drag coefficient of the aircraft under these conditions is 0.045. Determine: (a) The net thrust of the engine (b) The mass flow rate through the engine (c) The gross thrust of the engine Then, if the exhaust pressure P=P,
General Electric J79-GE-15 turbojet engine is one of two propelling a McDonnell F4C airplane is powered by two General Electric J79-GE-15 turbojet engines. F4C has the following characteristics: wing area S=49 m², engine inlet area A=0.6 m², cruise Mach number M,=0.82, and flight altitude of 9144 m. The drag coefficient of the aircraft under these conditions is 0.045. Determine: (a) The net thrust of the engine (b) The mass flow rate through the engine (c) The gross thrust of the engine Then, if the exhaust pressure P=P,
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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A General Electric J79-GE-15 turbojet engine is one of two propelling a
McDonnell F4C airplane is powered by two General Electric J79-GE-15
turbojet engines. F4C has the following characteristics: wing area S=49 m²,
engine inlet area Aj=0.6 m², cruise Mach number M.=0.82, and flight altitude
of 9144 m. The drag coefficient of the aircraft under these conditions is 0.045.
Determine:
(a) The net thrust of the engine (b) The mass flow rate through the engine
(c) The gross thrust of the engine
Then, if the exhaust pressure P=P,
(d) Estimate the exhaust velocity V, assuming that the turbine exit stagnation
temperature (which is the nozzle entry stagnation temperature) as Toe=1005.4
K with negligible fuel flow ratio.
(e) Estimate the exit static temperature T. (f) The exit Mach number M.
take for 9144 m altitude p.= 4.61x10' kg/m’ , T=229 K°, y=1.4, and R=287
kg/j.K, C,=1100 j/kg.K
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