叶顶间隙大小和壁面相对运动对低速轴流压气机孤立转子性能的影响  

THE EFFECT OF TIP CLEARANCE GAP SIZE AND WALL ROTATION ON THE PERFORMANCE OF A LOW-SPEED AXIAL COMPRESSOR ROTOR

作　　者：邓向阳[1] 张宏武[1] 陈乃兴[1] 黄伟光[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100080

出　　处：《工程热物理学报》2004年第5期773-775,共3页Journal of Engineering Thermophysics

基　　金：中国科学院知识创新项目资助(No.KGCX2-301)

摘　　要：本文针对一低速轴流压气机孤立转子,利用数值方法分析了不同叶顶间隙大小、机匣和叶顶之间相对运动对其总体性能的影响。 结果表明存在着最佳顶部间隙,原因是顶部区域吸力面边界层引起的损失由于叶顶间隙流的作用而减少,虽然存在泄漏损失,但总损失却小于无顶部间隙时的损失。壁面相对静止和相对运动时的顶部区域二次流和损失分布有着明显的区别,因此某些没有考虑壁面相对运动的平面叶栅实验或计算结果在用于压气机转子设计时,需要经过一定的修正。The performance of a low-speed axial compressor rotor for different tip clearance gap sizes, with stationary or rotating casing wall is investigated by a numerical simulation. The numerical result indicates that there is an optimal tip clearance size. Compared to no tip clearance the loss caused by the suction boundary layer in the tip region is decreased due to the tip clearance flow, even though a leakage loss is introduced. The secondary flow and the loss in the tip region are very different for the case of rotating and still shroud. So some experimental and numerical results acquired from a linear cascade without end-wall motion need to be modified when used in the rotor.

关 键 词：轴流压气机 顶部间隙 泄漏流 

分 类 号：TK474[动力工程及工程热物理—动力机械及工程]