Experimental research on secondary flows in cascade of blades. Effects of blade aspect ratio on the performance of compressor cascade with regard to the Reynolds number effect.

Abstract

The performance of the compressor-type cascade blades of small aspect ratio (AR, AR=2.08, 1.39, 1.04 and 0.83) at the center of the blade span has been experimentally assessed. The relation between the performance and Reynolds number (Re) is obtained. This relation is used to eliminate the Re effect on performance. Consequently, pure effects of blade AR on performance, i. e., total pressure loss, turning angle and axial velocity ratio, are obtained.