Polytropic process (S1=S2.constant k) 。pwk= constant a polytropic process of an ideal gas with constant k is an isentropic process. P n=-1 n =k n=±oo v=constant n=-1 n=0 n=0 p constant n=1 T=constant constant n=1 n=士o n=k S 上游充通大 April 28,2019 7 SHANGHAI JIAO TONG UNIVERSITYApril 28, 2019 7 Polytropic process  a polytropic process of an ideal gas with constant k is an isentropic process