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From: bilbo.niket@LOCUS.UCLA.EDU ("Niket K. Patwardhan")
Newsgroups: net.space
Subject: scram-jets
Message-ID: <8602250509.AA05703@s1-b.arpa>
Date: Mon, 24-Feb-86 18:24:46 EST
Article-I.D.: s1-b.8602250509.AA05703
Posted: Mon Feb 24 18:24:46 1986
Date-Received: Fri, 28-Feb-86 01:21:42 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 11

From what I read, the air in a scram-jet is not slowed down to be below the
speed of sound. I expect the combustion velocity must be greater than the
speed of the air, otherwise the engine would keep flaming out, and would need
to be constantly ignited. Three questions:

1) Can the combustion velocity actually be greater than the speed of sound?
(I expect the answer is NO).

2) What is the limiting velocity for kerosene-air and for LH2-air in an engine?

3) What is the limiting combustion velocity for kerosene-air and LH2-air?