时序效应对导叶式离心泵叶轮做功的影响  

Influence of clocking effect on performance of impeller in centrifugal pump with vaned diffuser

作　　者：辜玉慧 阴鑫月 邓晓琴 赵泽川 江伟 GU Yuhui;YIN Xinyue;DENG Xiaoqin;ZHAO Zechuan;JIANG Wei(College of Water Resources and Architectural Engineering, Northwest A & F University, Yangling, Shaanxi 712100, 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

出　　处：《排灌机械工程学报》2022年第8期785-792,共8页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51809218);陕西省水利科技计划项目(2017slkj-5);大学生创新创业训练计划项目(S201910712207)。

摘　　要：为了研究导叶时序安装位置对离心泵水力性能及运行稳定性的影响,采用SST k-ω湍流模型对在不同导叶安装时序位置时离心泵内部非稳态流场进行数值计算,分析导叶时序位置对叶轮做功的影响规律.结果表明:同一导叶时序位置时,因动静干涉影响,叶轮叶片做功呈现周期性波动;不同导叶时序位置时,各叶轮叶片做功呈现的波峰与波谷时刻不同,且出现明显的相位差,表明时序位置对叶轮叶片做功的影响因素主要为叶轮-导叶动静干涉、叶轮-蜗壳动静干涉及蜗壳不对称几何形状等;不同导叶时序位置时,叶轮流道做功均呈现周期性波动,并出现相位差,同时因叶轮-导叶动静干涉作用影响,叶轮出口处压力场分布不同,表明叶轮-导叶动静干涉是导叶时序效应对其叶轮流道做功影响的主要因素.研究结果可为导叶式离心泵设计提供一定理论依据.In order to study the influence of clocking location of the guide vane on the hydraulic performance and operational stability of the centrifugal pump,the SST k-ωturbulence model was used to analyze the unsteady flow inside the centrifugal pump when the guide vane was located at different clocking locations.The influence of the clocking location of the guide vane on the impeller′s work was studied.The results show that the work of the impeller blade fluctuates periodically due to the rotor-stator interaction at the same clocking position of the guide vane.At different clocking location of the guide vanes,the peak and trough times of the work performed by the impeller blades are different,and there is an obvious phase difference.It shows that the influence factors of the clocking effect on the work of the impeller blade are mainly the impeller-guide vane rotor-stator interaction,and the impeller-volute rotor-stator interaction,and the asymmetric geometry of volute.At different clocking locations of the guide vanes,the work done by the impeller flow passage shows periodic fluctuations and a phase difference.At the same time,due to the influence of the impeller-guide vane rotor-stator interaction,the pressure field distribution in the impeller outlet area is different.It also shows that the influence of impeller-guide vane rotor-stator interaction is the main factor of the influence of the cloc-king effect of the guide vane on the work by the impeller passage.

关 键 词：离心泵 时序效应 叶轮做功 动静干涉 数值模拟 

分 类 号：S277.9[农业科学—农业水土工程] TH311[农业科学—农业工程]