多级离心泵导叶的时序效应  

Clocking effect of guide vane in multi-stage centrifugal pump

作　　者：张可可 谈明高[1,2] 吴贤芳 马皓晨[4] 刘厚林[1,2] ZHANG Keke;TAN Minggao;WU Xianfang;MA Haochen;LIU Houlin(National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013,China;Zhenjiang Fluid Engineering Equipment Technology Research Institute, Jiangsu University, Zhenjiang, Jiangsu 212009,China;School of Energy and Power Enginee-ring, Jiangsu University, Zhenjiang, Jiangsu 212013,China;School of Mechanical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013,China)

机构地区：[1]江苏大学国家水泵及系统工程技术研究中心,江苏镇江212013 [2]江苏大学镇江流体工程装备技术研究院,江苏镇江212009 [3]江苏大学能源与动力工程学院,江苏镇江212013 [4]江苏大学机械工程学院,江苏镇江212013

出　　处：《排灌机械工程学报》2021年第7期663-670,共8页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家重点研发计划项目(2019YFC0312401);国家自然科学基金资助项目(51679110,51979124,51779108)。

摘　　要：为研究不同导叶时序位置下离心泵性能变化,以一台节段式2级离心泵为研究对象,采用RNG k-ε湍流模型对不同导叶时序位置下泵内流场进行数值计算.以次级导叶相对于首级导叶的周向顺时针旋转10°为一个时序位置,共设计6种时序方案.研究结果表明:在1.0Qd工况下,相比较无导叶时序方案,当旋转角度φ为导叶叶片间夹角的1/2时,泵扬程和效率的增加幅度达到极大值,分别为0.18%和0.16%;导叶时序对泵性能的影响随着流量的增大不断增大;各监测点处压力脉动主频幅值均随着次级导叶时序角度的增大呈先减小后增大趋势,当首级导叶和次级导叶交错角为30°时脉动主频幅值达到最小,相较于无导叶时序方案最大降低幅度达34.3%;改变导叶时序可有效降低多级泵级间的旋涡大小和强度,从而降低泵内的压力脉动强度.To study the influence of clocking effect on the performance of multi-stage centrifugal pump,the RNG k-εturbulence model was used to simulate the flow field in the two-stage centrifugal pump under different guide vane clocking positions.Six schemes were designed for one time position when the secondary guide vane relative to the primary guide vane was rotated with clockwise 10 degrees.The results indicate that under the design flow rate,compared with that of no clocking scheme,when the clocking angle of the second guide vane is half of the angle between the guide vanes,the increase of the pump head and efficiency reaches the maximum value,up to 0.18%and 0.16%,respectively.With the increase of flow rate,the influence of clocking effect of guide vanes on pump perfor-mance gradually increases.With the increase of the clocking angle of the secondary guide vane,the dominant frequency amplitude of pressure fluctuation at each monitoring point first decreases and then increases.When the staggered angle of the first and second guide vanes is 30°,the amplitude of the dominant frequency amplitude of pressure fluctuation reaches the minimum,which is 34.3%lower than that of the no clocking scheme.The change of the clocking position can effectively reduce the inter-stage vortex area and intensity,thereby reducing the intensity of the pressure fluctuation in the pump.

关 键 词：多级离心泵 导叶 时序效应 数值分析 

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