At last, numerical simulation of subsonic, transonic and supersonic flow fields of nozzle are calculated.This method overcomes deflects of three-dimensional method of characteristics.

• 最后，对整个喷管的亚、跨和超音速对称和非对称流场进行模拟，克服了三维定常特征线法不能求解亚、跨音速的缺陷。