进气畸变对发动机稳定性影响的分析模型

1引言目前,关于进气畸变对风扇/压气机性能和稳定性影响的模型有:平行压气机模型1],级叠加模型2],激盘模型3],彻体力模型4,5]和三维CFD计算等。但对于全台发动机来说,已有的计算模型都是采用平行压气机理论,而且认为压气机出口畸变完全衰减。基于这种理论,建立的发动机分析

Model of the effect of inlet flow distortions on engine stability

In order to investigate and analysis the effect of the distortion on the engine stability, a model of the effect of inlet distortions on the stability is presented. In this model, the blade force, work and the bleed air are treated as the source terms. The model takes into account the mixing of quality and the momentum between the sub-compressors in the angular regions, thus overcomes the shortcomings of the traditional parallel compressors model. There is a good agreement between the numerical results and the experimental data of sensitivity coefficients to the distortion of a turbofan engine and a three-stage fan.