Problem 13.18[Difficulty: 2]Given:Flow in a converging-diverging nozzle to a pipeFind:Plot of mass flow rateSolution:The given or available data isR=286.9J/kg·Kk=1.4T0=293Kp0=101kPaDt=1cmDe=2.5cmAt=0.785cm2Ae=4.909cm2Equations and Computations:The critical pressure is given byp* =53.4kPaThis is the minimum throat pressureFor the CD nozzle, we can compute the pressure at the exit required for this to happenA* =0.785cm2(= At)Ae/A* =6.25Me=0.0931or3.41(Eq. 13.7d)
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