平面叶栅中两类叶型探针影响特性的对比研究

Comparative Investigation of the Influence Characteristics Between Two Types of Airfoil Probe in a Plane Cascade

采用平面叶栅吹风试验方法,针对压气机叶栅中两类叶型探针(A类、B类)的影响特性进行对比研究,在整理分析原型叶栅变工况流动特性的基础上,从叶片表面等熵马赫数、总体性能参数与栅后尾迹等三个层面详细考察了两类叶型探针的影响程度及变化规律。研究结果表明:对于叶栅通道内没有激波的亚音流场环境,A类探针的综合影响程度略小于B类探针,而对于叶栅通道内会形成强激波的跨音流场环境,A类探针的综合影响程度要大于B类探针;A类探针对叶栅出口尾迹分布的扰动作用大于B类探针,预示在压气机多叶排环境下B类探针的工程适用性更好。

The comparative investigation of the influence characteristics between two types of airfoil probe （ type A and tpye B） in a compressor cascade was carried out using plane cascade experimental method in this paper. Firstly, the performance parameters under different operating conditions of prototype cascade were collated and analyzed, then the influence degree and related properties of these two types of airfoil probe on the aerodynamic performance of the compressor cascade were detailly examined in terms of the blade sur- face isentropic Mach number, the overall performance parameters and the wake flow. The results show that the synthesized adverse in- fluence degree of type A probe is slightly less than that of type B probe in the subsonic flow field environment （ not appearing the pas- sage shock wave） of compressor cascade, however, the combined adverse influence degree of type A probe is greater than that of type B probe in the transonic flow field environment （appearing the strong shock wave） of compressor cascade. Furthermore, the disturb- ance of cascade exit wake flow caused by type A probe is greater than that of type B probe, which means the engineering applicability of type B probe in multistage compressor is better.