Some Surge Investigations on a Low Speed Compressor

Abstract

This paper summarises some exploratory tests on a low speed low pressure ratio multi-stage axial compressor, in which mismatching was simulated by appropriate staggering of the stages, the last stage alone being unchanged. Overall and stage characteristics and surge flow coefficients were determined for two degrees of mismatching and for the fully matched condition. In addition, velocity and yaw traverses were made at the first and last stages, and flow fluctuation measurements were also made at selected positions.