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Orifice with critical pressure drop
- Thread starter lbvex
- Start date
sailoday28
Mechanical
For choked flow, that is flow which is a maximum, is independent of downstream pressure.
For two phase homogeneoujs flow, the max flow can be higher than that normally calcualted for equilibriulm isentropic conditions. It is a choked flow in a metastable state. Under that flow condition, the fluid does not flash as normally expected and typically higher flows occur.
A good example is subcooled flow thru a trap. Flows of two phase steam water have been measured to be higher than that for equilibrium flow.
Touch base with a trap vendor to get a feel for hot water flow thru an orifice. Also search for some old ASME papers on the subject.
For two phase homogeneoujs flow, the max flow can be higher than that normally calcualted for equilibriulm isentropic conditions. It is a choked flow in a metastable state. Under that flow condition, the fluid does not flash as normally expected and typically higher flows occur.
A good example is subcooled flow thru a trap. Flows of two phase steam water have been measured to be higher than that for equilibrium flow.
Touch base with a trap vendor to get a feel for hot water flow thru an orifice. Also search for some old ASME papers on the subject.
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