Air enters the diuser of a ramjet engine at 22 kPa, 228 K and avelocit...

Air enters the diï¬€user of a ramjet engine at 22 kPa, 228 K and a velocity...

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Mechanical Engineering

Air enters the diï¬€user 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 speciï¬c 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 diï¬€user 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?

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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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