This paper describes in some detail the method for computing an axial-flow compressor flow field under distortion.Based on the multiple-sector parallel compressor model and stream line curvature method

the stage distributions of the parametres of distorted flow field

such as total pressure

total temperature

static pressure

static temperature

air velocity and swirl angle

are obtained by solving the radial-equilibrium equation

then the details of compressor flow field under the given inlet distortion can be reached.As an example the flow field computation for a single stage compressor has been completed under the inlet circumferential distortion.The results demonstrate the practical value of the method.