Pulsejet ejector thrust augmentor

Details Pulsejet ejector thrust augmentor Pulsejet ejector thrust augmentor

2005-04-26

2005-04-26

Koczo, Michael (Department: 3746)

Power plants

Reaction motor

Intermittent combustion

C060S039760

Reexamination Certificate

active

06883304

ABSTRACT:
A pulsejet system and method requires no pulsejet internal moving parts. Each pulsejet includes a combustion chamber having an upstream inlet port joined to an inlet diffuser, boundary layer air ports enveloping the combustion chamber, and a downstream exit port joined to a discharge nozzle. Each pulsejet discharges into an ejector to increase net thrust. Each ejector includes an augmentor cell having side walls and perforated end plates. The perforated end plate between each pair of pulsejets is shared to permit the discharge thrust to equalize across the pulsejet group. Air and fuel mix in the combustion chamber and are detonated by a reflected back-pressure wave. Detonation/deflagration reverse pressure waves compressing boundary layer air flow act as a pneumatic throat to temporarily choke off inlet fresh air at the upstream inlet port. The pneumatic throat replaces the conventional mechanical valve used for this purpose.

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