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[Zin]

Critical and non-Critical Flow of flow pattern by critical pressure ratio (r_c)

x = Cp/Cv

critical pressure ratio (r_c) = (2/(x+1))^(x/(x-1))

 

When r_c < (Downstream Pressure/Upstream Pressure), is Non-Critical flow.

When r_c >= (Downstream Pressure/Upstream Pressure), is Critical flow.

 

* My Question is, "Can the flow pattern depend on different calculation for Nozzle and Squared Edge?"

 

Best Regards and Thanks

 

 

PS: I am calculating the ORIFICE SIZING for NOZZLES AND SQUARED-EDGE.