离心压气机进口导叶尾迹的形态、输运及与叶轮流场的相互影响

采用数值模拟方法研究了跨声速离心压气机进口导叶与叶轮的静/动叶排相互影响作用,研究包括三种几何间距模型及对同一间距模型使用了两种不同的转静子交界面位置设定.计算结果表明:交界面位置的设定对混合平面法定常计算性能会产生较大影响,对非定常性能影响很小;叶排间距大小对级性能影响几乎可以忽略,但间距减小会造成流场内压力波动增大;叶轮激波使叶轮对导叶流场的影响几倍甚至十几倍大于导叶对叶轮流场的影响,且激波的影响作用使导叶压力面、吸力面侧压力波动由不同的原因造成. 

IGV wake state, transportation and interaction influence with impeller blade row in centrifugal compressor

Numerical investigation was carried out to study the inlet guide vane (IGV) and impeller interaction in a transonic centrifugal compressor.Three blade-row gaps and two rotor/stator(R/S) location settings for each gap model were included in the simulations.The results show that,the R/S location greatly affects the steady calculation performance,but has little effect on the unsteady performance.The IGV-impeller gap barely influences the compressor stage performance,but small gap leads to large pressure pulsation inside the flow field.The existence of impeller shock increases the influence of impeller to IGV several times,even dozens of times for IGV to impeller.And,the formation of pressure pulsation on the IGV pressure and suction side is different due to impeller shock.