压气机静子双圆弧倒置串列叶栅流动性能的试验研究

本文对三种不同弦长比和弯度比的压气机静子双圆弧倒置串到叶栅,改变其轴向距离和周向偏距等参数,组合成21种不同几何参数的串列叶栅。在Ma_1=0.3左右,Re=2.7×10~5下进行了吹风试验,得出其主要流动性能,如气流转角Δβ和气流流动损失系数(?)随气流攻角i的变化关系;并找出其在最佳状态下主要几何参数的工作范围。

FLOW PERFORMANCE OF REVERSED TANDEM CASCADES WITH DOUBLE-CIRCULAR ARC PROFILE FOR COMPRESSOR STATOR

Blowing experiments have been completed on 21 kinds of reversed tandem cascades with different geometrical parameters. The cascades were designed by the aid of a computer program with reference to the configurations of the tandem cascades of Turmo-IIIc, J69 and J85 compressor stators. The main flow performances were obtained in the form of a group of curves. Three conclusions are drawn as follows. l.The turning angle of the reversed tandem cascade is larger than that of a single blade cascade, while the pressure loss coefficient is smaller. 2.The reversed cascades still possess a better performance even if the incident angle is about -13°. Therefore, they can be suitable for application under conditions of minus incident angles. 3. The relative displacement and the relative axial distance of reversed tandem cascades should be matched well.