【摘 要】
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Three suction configuration with streamwise suction slot at the lower endwall were investigated and compared with the prototype cascade.The results show that BLS(boundary layer suction)can effectively
【机 构】
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No.2 Linggong Road,Ganjingzi District,Dalian City,Liaoning Province,P.R.C.,116024,School of Aeronaut
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Three suction configuration with streamwise suction slot at the lower endwall were investigated and compared with the prototype cascade.The results show that BLS(boundary layer suction)can effectively suppress the separation and back flow of the lower corner,reduce the total pressure loss of the cascade and improve the load capacity near the lower endwall.However,separation of the upper corner was also slightly enhanced.The suction slot adjacent downstream the location of the corner separation point of the prototype scheme i.e.EW2 absorbs the separation point,and performs best among the three suction schemes.Either too little or too much suction flow rate makes no additional contribution to the improvement.EW2 with the suction flow of 0.5%inlet flow,the overall total pressure loss is reduced by 27.65%,the static pressure ratio is increased by 8.69%,and the stall margin is expanded.
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