Abstract:
Pulse jet engine is a type of jet engine which the combustion occurs in pulses. It can be made with or without moving parts and are capable of running statically. There are two type of pulsejet, Valved and Valveless and the both operate with similar principle which is uses the resonant combustion and harness the expanding combustion products to form a pulsating exhaust jet which produce thrust intermittently.
Valved engines use a mechanical valve to control the flow of expanding exhaust, forcing the hot gas to go out the back of the engine through the tailpipe only, and allow fresh air and more fuel to enter through the intake. The other type of pulsejet, valveless pulsejets, have no moving parts and use only their geometry to control the flow of exhaust out of the engine. Valveless engines expel exhaust out of both the intakes and the exhaust, most try to have the majority of exhaust to go out through the longer tail pipe, for more efficient propulsion..
