Can Sonic Velocity Be Achieved in a Short, Constant Cross-Section Pipe?

[arhanbezbora]

Can sonic velocity be achieved in a short pipe with constant cross-section, assuming isentropic flow with no viscous effects being taken into account?

Thank you.

 

[FredGarvin]

I can't think of any reason why not as long as the delta P is large enough.

 

[arhanbezbora]

Large enough? How large would the pressure gradient need to be? Thanks

 

[FredGarvin]

For a quick calculation, use bernoulli knowing the flow diameter of the tube. Solve for P1-P2