Air enters the diffuser of a turbojet engine with a mass flow rate of 65 lb/s at 9 lbf/in2, 420°R, and a velocity of 750 ft/s. The pressure ratio for the compressor is 12, and its isentropic efficiency is 88%. Air enters the turbine at 2600°R with the same pressure as at the exit of the compressor. Air exits the nozzle at 9 lbf/in2. The diffuser operates isentropically and the nozzle and turbine have isentropic efficiencies of 92% and 90%, respectively. Use an air-standard analysis. (a) the rate of heat addition, in Btu/h. (b) the pressure at the turbine exit, in Ibf/in.2 and psi (c) the compressor power input, in Btu/h. d) the velocity at the nozzle exit, in ft/s.

Air enters the diffuser of a turbojet engine with a mass flow rate of 65 lb/s at 9 lbf/in2, 420°R, and a velocity of 750 ft/s. The pressure ratio for the compressor is 12, and its isentropic efficiency is 88%. Air enters the turbine at 2600°R with the same pressure as at the exit of the compressor. Air exits the nozzle at 9 lbf/in2. The diffuser operates isentropically and the nozzle and turbine have isentropic efficiencies of 92% and 90%, respectively. Use an air-standard analysis. (a) the rate of heat addition, in Btu/h. (b) the pressure at the turbine exit, in Ibf/in.2 and psi (c) the compressor power input, in Btu/h. d) the velocity at the nozzle exit, in ft/s.

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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7Air enters the diffuser of a turbojet engine with a mass flow rate of 65 lb/s at 9 lbf/in2, 420°R, and a velocity of 750 ft/s. The pressure ratio for the compressor is 12, and its isentropic efficiency is 88%. Air enters the turbine at 2600°R with the same pressure as at the exit of the compressor. Air exits the nozzle at 9 lbf/in2. The diffuser operates isentropically and the nozzle and turbine have isentropic efficiencies of 92% and 90%, respectively. Use an air-standard analysis. (a) the rate of heat addition, in Btu/h.(b) the pressure at the turbine exit, in lbf/in.2 and psi(c) the compressor power input, in Btu/h.(d) the velocity at the nozzle exit, in ft/s.
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