<DOC>
<DOCNO>
166
</DOCNO>
<TITLE>
flow of chemically reacting gas mixtures .
</TITLE>
<AUTHOR>
clarke,j.f.
</AUTHOR>
<BIBLIO>
coa r117, 1961.
</BIBLIO>
<TEXT>
  suitable forms of the equations
for the flow of an inviscid, nonheat-conducting
gas in which chemical
reactions are occurring are derived .
the effects of mass diffusion and nonequilibrium
amongst the internal
modes of the molecules are neglected .
  special attention is given to
the speeds of sound in such a gas
mixture and a general expression for
the ratio of frozen to equilibrium
sound speeds is deduced .  an example
is given for the ideal dissociating
gas .  the significance of the velocity
defined by the ratio of the convective
derivatives of pressure and density is
explained .  it is the velocity
which exists at the throat of a convergentdivergent
duct under maximum
mass flow conditions, and it is shown that
this velocity depends on the
nozzle geometry as well as on the 'reservoir' conditions .
  as an illustration the phenomena of
sound absorption and dispersion are
discussed for the ideal dissociating gas .
the results can be concisely
expressed in terms of the frozen and
equilibrium sound speeds, the
frequency of the (harmonic) sound
vibration and a characteristic time for
the rate of progress of the reaction .
</TEXT>
</DOC>
