涡流发生器和附面层抽吸相结合对于低速压气机叶栅性能的影响

Combined Effects of Vortex Generator and Boundary Layer Suction on Performance of Low-Speed Compressor Cascade

关键词:  低马赫数  轴流压气机叶栅  微型涡流发生器  附面层抽吸

Key words:  Low Mach number  Axial flow compressor cascade  Micro-vortex generator  Boundary layer suction

摘要:

为了分析微型涡流发生器(MVG)和附面层吸气(BLS)相结合的方法对高负荷轴流压气机流动特性的影响，将一种弯曲的微型涡流发生器与缝式吸气槽进行不同组合，共组成五组控制模型进行对比。其中，微型涡流发生器安装在叶片上游端壁上，缝式吸气槽位于叶片吸力面靠近尾缘处。计算结果说明:在设计攻角下，COM控制方法在使总压损失明显减小的同时增加静压系数，性能优于单独使用MVG，却不及只使用BLS的控制方法。在失速攻角下，MVG产生的尾涡将位于叶片吸力面-端壁角区之间的低能流体和主流充分混合，使得总压损失大幅度减小了11.54%。在吸气量为1.5%时，COM控制方法可以使总压损失减小达14.59%。

Abstract:

In the current study， the effects of combination between micro-vortex generator (MVG) and boundary layer suction (BLS) on a high-lode compressor cascade are explored. Five cases are grouped by a kind of micro-vortex generator and suction slot. The MVG are mounted on the end-wall in front of the passage， and the BLS are all applied on the suction side of the blade near the trailing edge. The calculated results show that: at design incidence， the method of combined MVG and BLS (COM) can make the total pressure loss decrease notably as well as the static pressure coefficient increase， which is more superior than MVG but not as good as BLS. At stall incidence， the main flow and low-energy flow between the suction side and end-wall are mixed by induce vortices coming from MVG， and the total pressure loss decrease by 11.54%. At a case with 1.5% suction mass flow ratio， the total pressure loss decreases by 14.59% when the COM control method is applied.