Joukowsky equation

lambdaLoverD

Hello everyone.
How do you do ! - this is my first post here.

A fluid dynamics question : do you know if the famous Joukowsky equation ([tex]\Delta P = \rho a \Delta V[/tex] ) applies to gases too ?

I have found a huge number of publications which mention the Joukowsky equation in relation to water hammer, i.e. the pressure wave(s) generated by a sudden closure of a valve in a water pipe.

On the other hand a similar phenomenon occurs with gases (although the pressure wave has lower amplitude). e.g. steam hammer. But very few publications mention it 0_o.

Does it have another name ? a different mathematical description (since gases are compressible) ?


This paper seems to indicate that the equation works for liquid+gas mixtures
http://www.ipt.ntnu.no/~jsg/publikas...ssurePulse.pdf
But how about gas only ?

Any hint is welcome
Thanks