摘要
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.
出处
《流体机械》
CSCD
北大核心
2011年第11期17-21,共5页
Fluid Machinery
关键词
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
