Page 75 - 48Fundamentals of Compressible Fluid Mechanics

3.7. SOUND SPEED IN TWO PHASE MEDIUM 37

In a way the definition of was so chosen that effective specific pressure heat
respectively. The
correction factors for the specific heat is not linear.

Since the equations are the same as before hence the familiar equation

for speed of sound can be applied as
"
"
and effective specific volumetric heat are "
and "
(3.48)
and "
Insert example with small
are smaller than similar variables in a pure

steel particles with air up to

gas. Hence, this analysis results in lower speed of sound compared to pure gas. 20%

It can be noticed that "
Generally, the velocity of mixtures with large gas component is smaller of of the
2

pure gas. For example, the velocity of sound in slightly wed steam can be about
one third of the pure steam speed of sound. At this stage the other models
for two phase are left for next
version (0.6).
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or a mixture of two phases, speed of sound can be expressed as

(3.49)

is defined as

where
(3.50)

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