离心泵蜗壳内旋涡流动的数值研究  

NUMERICAL INVESTIGATION OF THE SWIRLING FLOW IN THE CENTRIFUGAL PUMP VOLUTE

作　　者：郭鹏程[1] 郑小波[1] 罗兴锜[1] 

机构地区：[1]西安理工大学水利水电学院,陕西西安710048

出　　处：《工程热物理学报》2006年第z1期149-152,共4页Journal of Engineering Thermophysics

基　　金：教育部高等学校博士点专项基金项目(No.20040700009);陕西省教育厅专项科研计划项目资助(No.05JK264)

摘　　要：采用"冻结转子法"处理叶轮与蜗壳间动静耦合流动的参数传递和相互干扰问题,研究了蜗壳进口周向非均匀来流对其内旋涡的演化发展的影响。分析表明,叶轮与蜗壳的干扰所造成的蜗壳进口周向流动的不均匀性是非常强烈的,整个蜗壳内的流动是以旋涡形式向出口推进的,且随工况的不同表现不同的演化过程,从而导致蜗壳内较大的流动损失。同时也说明只有考虑蜗壳来流的非均匀性影响,才能准确地模拟其内的旋涡运动。A numerical investigation for a centrifugal pump volute is performed to study the swirling flow influenced by uneven inflow at the volute inlet and the frozen rotor approach is set between the impeller and the volute to transform the coupling information of flow fields.The study shows that the unevenness of the flow with circumferential direction at the volute inlet is very significant due to the interaction between the impeller and the volute.The flow field is characteristic of the vortex flow in the volute,and the vortex flow takes on different evolving process with the change of the operating conditions.All these result in large flow loss in the volute.It also can be concluded that more appropriate numerically results can be obtained in consideration of the uneven inflow of volute.

关 键 词：离心泵蜗壳 冻结转子法 数值研究 旋涡流动 

分 类 号：TH311[机械工程—机械制造及自动化]