【作者】 侯献军； 金雪； 刘志恩； 颜伏伍； 袁守利；

【Author】 Hou Xianjun Jin Xue Liu Zhien Yan Fuwu Yuan Shouli (School of Automotive Engineering,Wuhan University of Technology,Wuhan 430070,China)

【机构】 武汉理工大学汽车工程学院；

【摘要】 建立某离心水泵的三维模型,应用Fluent流体计算软件,采用多重参考坐标系MRF算法对其内部流场进行数值模拟。结果表明,在叶片根部背面会出现气蚀;水流从入口到出口先后与叶根、叶梢以及蜗壳侧壁撞击,产生较大湍动损失。因此,增大叶轮入口直径以降低入口速度,气蚀现象得到改善;增加蜗壳螺旋型壁面厚度,减小了水流对壁面的冲击,降低了能量损失。更多还原

【Abstract】 Inner flow field of a centrifugal water pump applied in automobile was numerically simulated by 3-D modeling and MRP(moving reference frame)method in CFD software Fluent.The results indicate that cavitation occurred at the back of blade root;the impact of water against blade root,blade end and side wall of spiral casing leads to turbulent kinetic energy loss.After optimization based on the resuilts,cavitation was improved by increasing inlet diameter which decreased inlet velocity.Energy loss was reduced by increasing the thickness of spiral casing which impaired the impact of water against the wall of spiral casing.更多还原