Numerical simulation of the effect of total pressure inlet distortion on a compressor rotor

Steady numerical simulation of the flow field of the Rotor37 with total pressure distortion inlet was conducted by resolving three dimensional Navier-Stokes functions in this paper.Three different low total pressure inlet conditions were considered: one distortion per revolution(1×120°), two distortions per revolution(2×60°) and four distortions per revolution(4×30°).The characteristics of the rotor with total pressure distortion were achieved.Influences of different frequencies of distortion were considered.The flow field of the rotor was analyzed in detail, and some preliminary conclusions were made: circumferential pressure distortion causes non-uniformity of other inlet parameters.The inlet total pressure induces total temperature distortion at the outlet.Massflow and efficiency decrease, and stall margin increases as the frequencies of distortion increase with the total spoiled sector of 120 degrees.Stability total pressure ratio depends only on the angle of the distorted sector and the loss of the stability total pressure ratio increases with the growing angle of the distorted sector.