三维效应对轴流压气机气动稳定性的影响

轴流压气机的气动稳定性模型,最初为一维模型,仅适用于描述喘振发作.对于旋转失速发作,在公开文献中有一些二维模型发表.本文提出了一类考虑压气机径向扰动对失速影响的新的气动稳定性模型.计算结果表明压气机的轴向扰动往往随着径向扰动的产生,径向扰动的强度影响压气机的气动稳定性,在叶尖还是叶根首先产生失速与压气机基元叶栅特性密切相关.本文对轴流压气机二维和三维气动稳定性模型的计算结果进行了对比分析.

Effects of 3D Flow on Aerodynamic Stability of Axial Flow Compressor

Concerning the models for discribing aerodynamic stability of axial flow compressor,the original model is onedimensional,and it is reasonable for the onset of surge only.For the onset of rotating stall,there are just some twodimensional models at published literatures.A threedimensional aerodynamic of compressor has been presented in this paper.An aerodynamic stability model concerning radial disturbance of compressor is presented.The calculated results show that the occurrence of radial disturbance is related to the axial velocity disturbance,which has important effect on aerodynamic stability of compressor.The position of onset of stall,in blade tip or hub,is dependent upon the characteristics of blade element.The comparisons of calculated results predicted by 2D and 3D aerodynamic stability model have also been made in this paper.