Air enters the diffuser of a ramjet engine (schematic shown below) at 6 lbf/in.2, 420°R, with a velocity of 1800 ft/s, a

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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 1800 Ft S A 1 (167.78 KiB) Viewed 25 times

Air enters the diffuser of a ramjet engine (schematic shown below) at 6 lbf/in.2, 420°R, with a velocity of 1800 ft/s, and decelerates essentially to zero velocity. After combustion, the gases reach a temperature of 2400°R before being discharged through the nozzle at 6 lbf/in.2 Diffuser- Nozzle I Flame holder 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.