(4).Rigid adiabatic nozzle P P. m2-r i 1 P2<PI Ci t<h m2 Cf2>Cf c-velocity i-mass flow rate Red line system(gas)-Closed system Nozzle as system- Open,adiabatic system 上游充通大 March 3,2018 10 SHANGHAI JLAO TONG UNIVERSITYMarch 3, 2018 10 Closed system (4)．Rigid adiabatic nozzle Red line system (gas) — Nozzle as system— Open, adiabatic system c – velocity m –mass flow rate