总压进气畸变对压气机转子气动影响的数值模拟

对压气机转子Rotor37在总压畸变进口条件下的流场进行了三维数值模拟.分别计算了整周1@120b, 2@60b, 4@30b三种低压入口条件下的特性参数, 详细分析了总压畸变对转子流场参数的影响, 并比较了三种低压入口时的转子特性.计算结果表明:周向总压畸变会引起入口参数分布的不均匀, 在转子出口处产生总温畸变.相同整周畸变角度, 随着畸变区域个数的增加转子流量降低, 效率下降, 稳定裕度增加.稳定边界压比仅与每个畸变区的大小有关, 随着畸变区扇形角的增加, 稳定边界压比损失增加. 

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 is emphasized by resolving three dimensional Navier-Stokes functions in this paper. Three different low total pressure inlet conditions were considered: one distortion per revolution ( ), two distortions per revolution ( ) and four distortions per revolution ( ). The characteristics of the rotor with total pressure distortion were achieved. Influences of different frequencies of distortion were considered. Detail analyses of the flow field of the rotor came to some preliminary conclusions: Circumferential pressure distortion causes ununiformity of other inlet parameters. The inlet total pressure induces total temperature distortion at the outlet. Massflow and efficiency decrease, stall margin increases as the frequencies of distortion increasing with the total spoiled sector of 120 degrees. Stability total pressure ratio depends on the angle of the distorted sector only and the loss of the stability total pressure ratio increases as the angle of the distorted sector increases.