M Pon (a) Ideal (isentropic )supersonic diffuser A Weak normal shock M1>1 M<1 P M M<1 Dor :>51 (b) Actual supersonic diffuser FIGURE 10.15 The ideal (isentropic) diffuser and compared with the actual situation 理想扩压器与实际扩压器的比较FIGURE. 10.15 The ideal (isentropic) diffuser and compared with the actual situation 理想扩压器与实际扩压器的比较