排灌机械工程学报
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排灌机械工程学报  2012, Vol. 30 Issue (4): 384-389    DOI: 10.3969/j.issn.1674-8530.2012.04.003
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双叶片离心泵内动静干涉的三维PIV测量
刘厚林, 杨东升, 谈明高, 王凯, 庄宿国
(江苏大学流体机械工程技术研究中心, 江苏 镇江 212013)
3D PIV measurements of rotorstator interactions in doubleblade centrifugal pump
 LIU  Hou-Lin, YANG  Dong-Sheng, TAN  Ming-Gao, WANG  Kai, ZHUANG  Su-Guo
(Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China)
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摘要 为研究叶轮与蜗壳的动静干涉作用,采用三维PIV对一双叶片离心泵最优工况下叶轮流道内3个截面内的流动进行了测量,每个截面内测量9个叶片位置.结果表明:随着叶片与隔舌距离的不同,叶轮流道内的相对速度场和轴向速度场发生了明显的变化;当叶片在隔舌与蜗壳1断面间时,流道内的流量最小,相对速度场分布最为均匀;在前盖板附近吸力面的流道出口出现了低速区,形成了射流-尾迹结构,并在流道进口发现较强的轴向速度;当叶片随着旋转方向远离隔舌时,流道内的流量逐渐增大,在叶片压力面进口出现了流动分离并产生了旋涡,而流道出口的相对速度变得平稳,同时流道进口的轴向速度减弱;当叶片随着旋转方向靠近隔舌时,叶轮流道内的流量逐渐减小,流道进口的旋涡减弱并消失,流道出口的压力面附近相对速度降低,吸力面附近的相对速度增大,同时流道进口的轴向速度继续减弱.
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刘厚林
杨东升
谈明高
王凯
庄宿国
关键词双叶片离心泵   动静干涉   PIV测量   旋涡   射流-尾迹     
Abstract: In order to study the impellervolute interaction in a doubleblade centrifugal pump, the flow in three sections of impeller passages was measured with nine different locations between a blade and the tongue of volute at the best efficiency point. The relative velocity field and axial velocity field are greatly dependent on the distance between a blade and the tongue. When a blade is between the tongue and the section 1 on volute, the flow rate in that passage is the lowest, and the relative velocity field is uniform. Meanwhile, there is a low velocity zone in the corner between the shroud and the blade suction side at the passage outlet, causing a jetwake flow pattern at the impeller outlet. A higher axial velocity range is observed at the passage inlet. As the blade leaves far away from the tongue due to its rotation, the flow rate in the passage is increased, and flow is separated from the blade pressure side, establishing a vortex there. The relative velocity profile at the passage outlet becomes uniform, and the axial velocity at the passage inlet decreases as well. As the blade gets close to the tongue, the flow rate in the passage is reduced, and the scale of the vortex is decreased and disappears eventually. The relative velocity at the blade pressure side outlet is lowered, but that at the blade suction side is increased, meanwhile the axial velocity at the passage inlet continues decreasing.
Key wordsdoubleblade centrifugal pump   impellervolute interaction   PIV measurement   vortex   
收稿日期: 2011-05-12; 出版日期: 2012-07-30
基金资助:

 国家杰出青年科学基金资助项目(50825902); 国家自然科学基金资助项目(51079062); 江苏省自然科学基金资助项目(BK2010346)

通讯作者: 杨东升 (1985—),男, 河南潢川人,硕士研究生(yangdongshengujs@126.com),主要从事离心泵稳定运行研究.   
作者简介: 刘厚林 (1971—),男, 江苏溧水人,研究员,博士生导师(liuhoulin@ujs.edu.cn),主要从事泵现代设计理论与方法研究.
引用本文:   
刘厚林,杨东升,谈明高等. 双叶片离心泵内动静干涉的三维PIV测量[J]. 排灌机械工程学报, 2012, 30(4): 384-389.
LIU Hou-Lin,YANG Dong-Sheng,TAN Ming-Gao et al. 3D PIV measurements of rotorstator interactions in doubleblade centrifugal pump[J]. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(4): 384-389.
 
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