Abstract
The paper reports the results of an experimental investigation on the effect of casing treatment on aerodynamic performance of a low-speed contrarotating axial compressor stage having a hub-tip ratio of 0.667. Three types of casing treatments, namely axial slots, axial skewed slots and circumferential grooves, have been examined. Flow structure downstream of the rotors is examined for treated casing and compared with solid casing. The results show a significant improvement in stall margin and efficiency during off-design operation of a contra stage.
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Schedule a callMore From: Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy
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