Air enters the diffuser of a ramjet engine (schematic shown below) at 6 lbf/in.2, 420°R, with a velocity of 1600 ft/s, and decelerates essentially to zero velocity. After combustion, the gases reach a temperature of 2200°R before being discharged through the nozzle at 6 lbf/in.2 On the basis of an air-standard analysis, determine: (a) the pressure at the diffuser exit, in lbf/in.2 (b) the velocity at the nozzle exit, in ft/s. Neglect kinetic energy except at the diffuser inlet and the nozzle exit. Assume combustion occurs at constant pressure and flow through the diffuser and nozzle is isentropic.
Air enters the diffuser of a ramjet engine (schematic shown below) at 6 lbf/in.2, 420°R, with a velocity of 1600 ft/s, and decelerates essentially to zero velocity. After combustion, the gases reach a temperature of 2200°R before being discharged through the nozzle at 6 lbf/in.2 On the basis of an air-standard analysis, determine: (a) the pressure at the diffuser exit, in lbf/in.2 (b) the velocity at the nozzle exit, in ft/s. Neglect kinetic energy except at the diffuser inlet and the nozzle exit. Assume combustion occurs at constant pressure and flow through the diffuser and nozzle is isentropic.
Welding: Principles and Applications (MindTap Course List)
8th Edition
ISBN:9781305494695
Author:Larry Jeffus
Publisher:Larry Jeffus
Chapter31: Oxyfuel Welding And Cutting Equipment, Setup, And Operation
Section: Chapter Questions
Problem 12R: What is the advantage of using an injector-type mixing chamber?
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Air enters the diffuser of a ramjet engine (schematic shown below) at 6 lbf/in.2, 420°R, with a velocity of 1600 ft/s, and decelerates essentially to zero velocity. After combustion, the gases reach a temperature of 2200°R before being discharged through the nozzle at 6 lbf/in.2
On the basis of an air-standard analysis, determine:
(a) the pressure at the diffuser exit, in lbf/in.2
(b) the velocity at the nozzle exit, in ft/s.
Neglect kinetic energy except at the diffuser inlet and the nozzle exit. Assume combustion occurs at constant pressure and flow through the diffuser and nozzle is isentropic.
(a) the pressure at the diffuser exit, in lbf/in.2
(b) the velocity at the nozzle exit, in ft/s.
Neglect kinetic energy except at the diffuser inlet and the nozzle exit. Assume combustion occurs at constant pressure and flow through the diffuser and nozzle is isentropic.
Transcribed Image Text:Diffuser-
Nozzle
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