Affiliation:
1. ONERA, Châtillon-sous-Bagneux, France
Abstract
Use of grooved outer casing to improve stall margin of high aspect ratio, high pressure ratio axial flow compressors has already been reported in the literature. Tests were made on a low aspect ratio supersonic compressor simulating a rotor of one of the last stages of an advanced multistage compressor to show the gain in performance due to deep grooves in the outer casing. The gain in stall margin is similar to the one that can be obtained by reducing the tip clearance of the rotor; however, with grooves there is a gain in pressure ratio whereas a decrease in pressure ratio was detected when testing the smaller tip clearance. The gain in performance due to outer casing grooves was observed for a wide range of tip Mach numbers, even in the high supersonic regime.
Publisher
American Society of Mechanical Engineers
Cited by
3 articles.
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