Influence of Tip Clearance on Performance of a Contra-Rotating Fan

查看全文 作　　者：Jian [1,2]Xu;Chunqing [2]Tan;Haisheng [2]Chen;Yangli [1,2]Zhu;Dongyang [2]Zhang

机构地区：[1]Graduate University of Chinese Academy of Sciences, Beijing 100049, China;[2]Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 1 O0190, China

出　　处：《Journal of Thermal Science》索引2009年第18卷第3期,共8页

摘　　要：Influences of tip clearance on the tip flow and associated loss mechanism in a contra-rotating axial flow fan hasbeen studied in the paper, based on three dimensional numerical results. The results with different tip clearanceare compared in terms of stage efficiency, relative total pressure loss coefficient, flow angle. It is found that theefficiency of the contra-rotating fan changes almost linearly with increment of the tip clearance, however, efficiencyof the rear rotor is observed to decrease more dramatically than that of the forward rotor given same tipclearance variation. The analysis on the flow structure indicates that the tip region flow field is qualitatively similarin both rotors. However, with the same clearance value, the leakage flow in the rear rotor is effected by a tipleakage vortex of greater intensity caused by relative loading levels and the inter rotor interaction. 关键词：间隙旋转总压损失系数风扇性能流动结构轴流风机数值结果

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Influence of Tip Clearance on Performance of a Contra-Rotating Fan

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