Compressible Flow Free Textbook

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2.5 Sound Speed in Two Phase Medium

For flow of mostly gas with drops of the other phase (liquid or solid)

Let

$\displaystyle {\rho \over \rho_a} = 1 + m$

(8)

where $m = {\dot{m}_b \over \dot{m}_a}$ is mass flow rate per gas flow rate. and the subscript a is for the gas phase and b for the liquid or solid phase.

The equation of state is

$\displaystyle {P \over \rho} = { R \over 1 + m} T$

(9)

$\displaystyle c = \sqrt{\gamma R_{mix} T}$

(10)

where

$\displaystyle \gamma = {C_p + mC \over C_v + mC}$

(11)

and $R_{mix} = { R \over 1 + m}$

Genick Bar-Meir ||| www.potto.org
copyright , 2006
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