Helium at 68 degf and 147 psia in a large tank flows, Ask an Expert

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Helium at 68 °F and 14.7 psia in a large tank flows steadily and isentropically through a converging nozzle to a receiver pipe. The cross-sectional area of the throat of the converging passage is 0.05 ft². Determine the mass flowrate through the duct if the receiver pressure is

(a) 10 psia,

(b) 5 psia. Sketch temperature-entropy diagrams for situations (a) and (b).

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