You know what it looks like… but what is it called?
TAKE THE QUIZ“resojet”
We have one entry that includes the term resojet.
resojet engine
noun: a jet engine consisting essentially of a continuously open air inlet, a diffuser, a combustion chamber, and an exhaust nozzle, having fuel admitted continuously, and having resonance established within the engine so that there is a pulsating thrust produced by the intermittent flow of hot gases
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Merriam-Webster unabridged