离心压气机叶片前缘几何形状对性能的影响  

EFFECT OF THE BLADE LEADING EDGE ON THE PERFORMANCE OF A CENTRIFUGAL COMPRESSOR

作　　者：初雷哲[1,2] 杜建一[1] 黄典贵[1] 赵晓路[1] 徐建中[1] 

机构地区：[1]中国科学院工程热物理研究所 [2]中国科学院研究生院,北京100080

出　　处：《工程热物理学报》2008年第5期767-769,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.50476085);国家863计划资助项目(No.2004AA503020)

摘　　要：本文采用数值模拟的方法研究了不同的叶片前缘几何形状对离心压气机性能的影响,研究表明:圆形前缘与钝头前缘相比能提高压气机的流通能力,并使压比和效率有明显的提高,但同时也会使得工作范围变窄,而椭圆形前缘会使得性能得到进一步的提高.流场分析显示,圆形前缘和椭圆形前缘可以减小叶片前缘造成的分离损失,并减小出口尾迹的损失,从而使得效率提高.采用圆形前缘和椭圆形前缘可以使得从分流叶片前缘位置往后的主叶片的载荷分布比较平均.使得主叶片和分流叶片的载荷分布比较合理,同时椭圆形前缘还可以使得分流叶片的做功能力增加.Numerical simulation was done to analyze the effect of the leading edge shape on the performance of a centrifugal compressor. Different kinds of geometry shapes of the blade leading edge were investigated in this paper. The result shows that using circle leading edge and ellipse leading edge can improve the performance, the chocking mass flow increases and the pressure ratio and efficiency increase obviously. Using ellipse leading edge can get a further improvement on the performance than circle leading edge. Using circle leading edge and ellipse leading edge can reduce the separation near the inlet which is caused by the leading edge. What＇s more, using circle and ellipse leading edge can also reduce the wake loss near the outlet of the impeller. Using circle or ellipse leading edge on the splitter can improve the pressure loading distribution of main blade near the position of the splitter leading, which can increase the pressure ratio.

关 键 词：离心式压气机 数值模拟 前缘形状 

分 类 号：TQ021.4[化学工程]