1707 An Experimental Study of Surge and Rotating Stall Inceptions in a Small Centrifugal Compressor

Abstract

Surge and rotating stall often damage a compression system. Ishii et al showed the possibility of these unsteady phenomena occurring simultaneously in an axial compressor. The authors examined relationship between surge and rotating stall occurring in small centrifugal compressor. In this paper, we examined relation between surge and rotating stall in a small centrifugal compressor. Our experimental results showed that both surge and rotating stall occurred simultaneously in the test centrifugal compressor. Further, it was recognized that fluctuations occurred just before these unsteady flow phenomena.