An ejector is to produce a vacuum. How to find the mass flow rate of secondary fluid from the container in which the sub-atmospheric pressure is to be produced, when both primary and secondary fluid are compressible fluids?
See book, Transport Phenomena by Bird et al..
I have an old edition of
Perry's Chemical Engineers' Handbook, 1963, McGRAW-HILL
On page 6-31, it gives a chart for the optimum design of single-stage ejectors.
Hope it helps you from a practical point of view.
It is easy to prove it numerically by taking an example.
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