Effects of compound-lean stator clocking in a low-speed axial compressor

The effect of compound-lean stator to influence the compressor performance by changing the circumferential position of the upstream wake entering the downstream blade passage, is discussed. The stator clocking has different levels of effect on compressor efficiency as the compressor operating condition varies. The mixing process of upstream stator row with the main flow increases the loss and deteriorates the flow behavior in the main flow region. The maximum 1.22% increase in efficiency at design condition is obtained through the combined effect of the compound lean and stator clocking, which indicates a potential way to enhance compressor performance. The maximum efficiency of the compressor with compound-lean stators occurs when the upstream wake impinges on the leading edge of the downstream stator.