压力温度组合畸变对发动机稳定性影响的数值研究

压力和温度组合畸变对某涡轮风扇发动机稳定性影响的数值研究表明，组合畸变中压力畸变和温度畸变的相对大小，决定了组合畸变对风扇或压气机稳定性影响的严重程度，压力畸变强度较大的组合畸变，对风扇的稳定性影响较大。组合影响系数表示发动机抗组合畸变的能力以及压力畸变和温度畸变之间的相互影响。当组合影响系数大于0时，相互影响加强，反之相互影响减弱。组合畸变对发动机稳定性的影响，不是压力畸变和温度畸变单独影响的简单相加，而是一种非常复杂的非线性关系。

A Numerical Study in Effect of Combined Pressure and Temperature Distortion on Engine Stability

A numerical study has been completed in effect of combined pressure and temperature distortion on stability of a turbofan engine. The results show that the ratio of pressure and temperature distortions determines the effect of combined distortion on stability of fan and compressor. The greater the pressure distortion is, the greater the effect on stability of fan becomes. Combined effective coefficient shows engine's capability to resist the combined distortion and the interaction between pressure and temperature distortions. Interaction tends to get greater, when combined effective coefficient is larger than zero. Or,it becomes weaker. The effect of combined distortion on engine stability is not a simple addition of pressure and temperature distortion effects, but a complex nonlinear relationship.