压气机叶栅端壁流控制的试验研究

本文通过“原始”叶栅 (即常规的直叶片叶栅 )、“前掠”叶栅、“端弯”叶栅和“掠弯”叶栅等四套大弯角叶栅的对比试验 ,研究端“前掠”、端“增弯”和端“掠弯”对流场的影响。其中 ,端“掠弯”是本文新创的一种端壁流控制技术。试验结果表明 ,作为前掠和增弯的结合体—“掠弯”叶栅 ,具有端“前掠”和端“增弯”对流场影响的双重特征。

AN EXPERIMENTAL INVESTIGATION OF ENDWALL FLOW CONTROL IN A COMPRESSOR PLANE CASCADE WIND TUNNEL

A comaprative experimental investigation on three kinds of end treatment cascade in relat ion to an original cascade is presented. Three end treatment techniques are end bend,end forward sweep,and end sweep bend.The last one is a new kind of endwall flow control techniuqe.Experimental results s how that:(1)The end forward sweep cascade can be used to delay flow separation and improve the distrib ution of flow parameters at the cascade exit;(2)For a shrouded stator,the end bend cascade with increasing turning angle at the end of the blade would increase the loss around the endwall region and induce flow separation in the mid span region;(3)For the case when it is required to increase the turning angle in the endwall region,the end sweep bend cascade has better performance than the end bend blade.