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Air enters the diffuser of a ramjet engine at 22 kPa, 228 K and a velocity...

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Mechanical Engineering

Air enters the diffuser of a ramjet engine at 22 kPa, 228 K and avelocity of 920 m/s, decelerating to a negligible velocity at thepoint at which heat is added. Using cold airstandard analysis withconstant specific heats at 300K, determine the following if the exitpressure is 22 kPa and heat is added at 750 kJ per kg of air:
(a) The pressure at the diffuser exit, in kPa.

(b) The velocity at the nozzle exit, in m/s.

(c) If the fuel used requires a temperature of 900K toauto-ignite, is the craft moving fast enough to use this fuel? Ifnot, what minimum speed must it be moving such that the airtemperature after compression will ignite the fuel?

Answer & Explanation Solved by verified expert
3.7 Ratings (316 Votes)
Solution Given Va 920 ms Ti 228 K Pi 22 KPaQ 22KJKga Calculation let Now we can calculate Match Number for entering position of airas follows Va    See Answer
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