半高导叶对离心泵压力脉动影响的数值模拟与试验研究  

Numerical and experimental study of influence of semi-high guide vane on pressure fluctuation in centrifugal pump

作　　者：江伟 朱相源[2] 田辉 李国君[2] 王玉川[1] JIANG Wei;ZHU Xiangyuan;TIAN Hui;LI Guojun;WANG Yuchuan(College ofWater Resources and Architectural Engineering,Northwest A&F University,Yanglin 712100,China;Key Laboratory of Thermal Fluid Science and Engineering of MOE,Xi′an Jiaotong University,Xi′an 710049,China;Department of Mechanical Engineering,Chengde Petroleum College,Chengde 067000,China)

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100 [2]西安交通大学热流科学与工程教育部重点实验室,陕西西安710049 [3]承德石油高等专科学校机械工程系,河北承德067000

出　　处：《中南大学学报（自然科学版）》2021年第4期1276-1286,共11页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51809218);中国博士后科学基金资助项目(2018M643744);陕西省水利科技计划项目(2018slkj-8,2017slkj-5);河北省高等学校科学技术研究项目(ZD2019122)。

摘　　要：采用SST k-ω湍流模型对不同半高导叶叶片高度时离心泵内部流场进行非稳态数值分析。通过数值模拟与试验方法探讨半高导叶对离心泵压力脉动性能的影响规律。研究结果表明:随着导叶叶高几何参数减小,导叶与蜗壳内压力脉动特性受叶轮-导叶动静干涉作用影响逐渐降低,叶轮-蜗壳动静干涉作用影响逐渐增强;采用半高导叶能有效改善内部流动的稳定性,蜗壳与导叶内流场分布更均匀,离心泵扬程曲线更平缓,最高效率逐渐增加,高效区变宽,且高效区向大流量偏移。The SST k-ω turbulence model was used to the unsteady numerical analysis of the internal flow field in the centrifugal pump with different blade heights of semi-high guide vanes, the influence of semi-high guide vane on the pressure pulsation performance of centrifugal pump was studied through numerical simulation and experiment. The results show that with the decrease of the height of the guide vane, the impacts on the pressure pulsation characteristics of the vane and the volute are gradually reduced by rotor-stator interaction of the impellerguide vane, and the influence of rotor-stator interaction of the impeller-volute is gradually enhanced. Using half height guide vane can effectively improve the stability of internal flow. And the flow field in volute and guide vane is more distributed, and the head curve of centrifugal pump is more gentle. Meantime, the highest efficiency is gradually increased, and the high efficiency area is widened.

关 键 词：半高导叶 压力脉动 内部流场 离心泵 动静干涉 

分 类 号：TH311[机械工程—机械制造及自动化]