Elbow Pipe Noise Reduction with Leading Edge Serrated Guide Vane
In order to study the effect of leading edge serration on the aerodynamic noise of elbow,large eddy simulation and acoustic analogy are performed as a hybrid computational method to investigate the influence of leading edge serration on flow field and sound field.Based on the experimental platform of pipeline,the numeri-cal calculation and experimental study of the elbow with guide vane are carried out,and the reliability of the nu-merical calculation method is verified.The result indicates that the leading edge serration can reduce the pressure loss thus improve the aerodynamic performance of the elbow,and stabilize the flow in the elbow;the laminar separation bubbles are reduced validly;the pressure pulsation intensity on the blade surface is effectively re-duced,thereby decreasing the unsteady load.The comprehensive actio reduces,the aerodynamic noise of the el-bow.
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