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.