An analysis of ramjet engines using supersonic combustion

Richard J. Weber, John S. Mackay
naca-tn-4386
Sep 1958


Based on the assumption that shock-free internal burning is possible in a supersonic airstream, calculations are made for the performance of ramjets using supersonic combustion velocities. Diffusion of the air from the flight speed to a lower supersonic velocity is generally found to be desirable before the air enters the combustor. With a constant-area combustor, both maximum thrust and overall engine efficiency are achieved when sufficient heat is added to choke the flow at the combustor exit.

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