结构变形对斜流压气机性能的影响研究

Impact of structure deformation on oblique flow compressor

采用基于有限元的结构静强度分析和CFD全三维流场仿真手段,对某斜流压气机工作状态下结构变形和变形后的气动性能进行研究,结果表明:提出的数值仿真流程能够有效模拟压气机工作状态下结构变形对气动性能的影响,从而为发动机系统参数平衡提供数据支撑;压气机叶片前缘顶部刚度小,变形量大,但对叶轮气动性能影响较小;叶轮尾缘边径向变形对压气机增压能力影响显著;顶部泄漏间隙的变化对压气机效率产生影响。

The structural deformation of an oblique flow compressor in working condition and its aerodynamic performance after deformation was studied by using static structural strength analysis based on the finite element and 3D flow field simulation method in CFD. The result shows that the numerical simulation method proposed in this article can be used to simulate the effect of structural deformation on aerodynamic performance of the compressor in running state, which is benefit for parameter balance of the engine system; the great deformation caused by poor rigidity on the leading edge of impeller has a less affect on aerodynamic performance; radial deformation on the trailing edge of impeller has significant influence On the total pressure ratio of the compressor; the efficiency of the compressor can be influenced largely by tip clearance.