A method of calculating the axial-flow compressor flow field under distortion was presented.The stage distribution in different faces was computed by solving the unsteady 3-D Euler equations.The transfer characteristic for 74A compressor

for example

was computed under the inlet circumferential total pressure distortion

then the distribution of total pressure

static pressure

total temperature and flow coefficient in different faces were obtained.The distribution of the distortion intensity

distortion range and distortion position in axial direction was acquired.