流体机械

2011, v.39;No.473(11) 17-21

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高速离心叶轮叶片开缝的数值研究
Numerical Study of Centrifugal Compressor with Slots in Blade Surface

韩伟;高丽敏;白莹;李晓军;高杰;
HAN Wei,GAO Li-min,BAI Ying,LI Xiao-jun,GAO Jie(Northwestern Polytechnical University,Xi′an 710072,China)

摘要(Abstract):

提出在离心叶轮吸力面尾部开缝抽吸的方法,在叶片吸力面尾部对低速流体区域进行抽吸,以减弱由叶轮内二次流所导致的射流—尾迹结构。以Krain高速离心叶轮为例,建立抽吸模型,并进行了数值计算。数值仿真结果表明,在压气机流量范围内,叶轮尾部开缝抽吸可以减少叶片表面的分离区域,改善叶轮内部流场的流动状况,有效地提高离心叶轮性能。
A new method of drilling through-slots in blade suction surfaces near the shroud of a centrifugal impeller is proposed,where low velocity area or separation area is sucked,as a result,the jet-wake flow caused by secondary flows in the impeller is weakened.The numerical model of Krain centrifugal impeller is built and computed.The result show that the seperation area near blade suction surfaces is reduced,the flow field inside centrifugal impeller is improved and better performance of the centrifugal impeller can be achieved by sucking from slots in suction surfaces.

关键词(KeyWords): 离心叶轮;叶片开缝;射流-尾迹结构;边界层控制
centrifugal impeller;slots in blade;jet-wake flows;boundary layer control

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作者(Author): 韩伟;高丽敏;白莹;李晓军;高杰;
HAN Wei,GAO Li-min,BAI Ying,LI Xiao-jun,GAO Jie(Northwestern Polytechnical University,Xi′an 710072,China)

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