非轴对称端壁成型技术的实验研究  

Experimental Investigation of Non-Axisymmetric Endwall Profiling Technique in Cascades

作　　者：汪传美[1] 李国君[1] 郑金[1] 董康田[2] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]西安热工研究院有限公司风机所,西安710032

出　　处：《西安交通大学学报》2008年第9期1086-1090,1101,共6页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(50476052)

摘　　要：通过风洞实验对三角函数非轴对称端壁成型法和压差非轴对称端壁成型法的效果进行了实验研究与考核.结果表明:与轴对称环形端壁相比,这2种非轴对称端壁使得总压损失系数都有不同程度的减小,在叶栅出口下游段距尾缘2 mm截面上,2套造型端壁流道的总压损失系数分别降低了7.78%和10.20%;在叶栅出口下游段距尾缘4 mm截面处,2套端壁造型流道的总压损失系数分别降低了9.70%和14.22%.实验还验证了2种端壁成型方法的有效性,采用这2种成型方法设计的叶栅流道能够降低叶栅的二次流流动损失,提高级效率.Aerodynamic performance of two kinds of annular turbine cascade with non-axisymmetric endwall, which are designed with trigonometric function profiling method and pressure difference profiling method, are experimentally investigated with an annular cascade wind tunnel test rig. The results show that the total pressure loss in both cascades with non-axisymmetric endwall are lowered compared with that in axisymmetric annular cascade, which decreases by 7. 78% and 10.20% respectively for these two cascades on the 2 mm measuring plane downstream of the cascade trailing edge. And on the 4 mm measuring plane downstream of the cascade trailing edge, the total pressure loss decreases by 9. 70% and 14. 22% respectively. These two profiling methods for non-axisymmetric endwall are validated by the experiments to provide a useful technique for reducing the secondary flow loss and to improve the efficiency of turbine cascade.

关 键 词：实验研究 非轴对称端壁 总压损失 二次流流动损失 

分 类 号：TK263[动力工程及工程热物理—动力机械及工程]