立式轴流泵装置内流瞬变特性数值分析  

Numerical analysis of internal flow transient characteristics of the vertical axial-flow pump device

作　　者：徐贵颖 王暴 王振华 栾逸 单秋雯 杨帆[1] XU Guiying;WANG Bao;WANG Zhenhua;LUAN Yi;SHAN Qiuwen;YANG Fan(College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou 225009,China;Suqian Hubin New District Bureau of Rural Affairs,Suqian 223800,China;Jiangsu Surveying and Design Institute of Water Resources Co.,Ltd.,Yangzhou 225127,China)

机构地区：[1]扬州大学水利科学与工程学院,江苏扬州225009 [2]宿迁市湖滨新区农村工作局,江苏宿迁223800 [3]江苏省水利勘测设计研究院有限公司,江苏扬州225127

出　　处：《水资源与水工程学报》2024年第4期111-118,共8页Journal of Water Resources and Water Engineering

基　　金：江苏省高校自然科学研究重大项目(20KJA570001);扬州市科技计划项目(YZ2022192);江苏省水利科技项目(2022074);扬州大学“青蓝工程”项目(扬大人资[2023]40号);江苏省研究生科研与实践创新计划项目(SJCX24_2242)。

摘　　要：为明确立式轴流泵装置内流瞬态变化特性,采用计算流体动力学(CFD)方法求解泵装置全流道内流场,并结合物理模型试验验证数值模拟的可靠性,得到不同流量工况下泵装置叶片区的瞬态流动特性。结果表明:叶轮进口偏流角较大的区域主要集中于叶轮前缘附近且随叶轮旋转呈动态变化,叶轮出口偏流角由轮毂向轮缘逐渐增大,导叶体出口偏流角较大的区域为导叶片尾缘周向位置。1.2 Q_(bep)工况时,叶轮进口轴向速度分布均匀度为89.5%,速度加权平均角为82.9°;当流量从0.8 Q_(bep)增加至1.2 Q_(bep)时,导叶体出口平均速度环量降低了12.1%;在流量工况为0.8 Q bep~1.2 Q_(bep)范围内,平均速度环量的最小值为4.7 m^(2)/s,此时流量为1.2 Q_(bep)。导叶体出口的涡结构特征显著,从导叶体进口到出口涡结构数量增多,涡体积减小,涡结构的合速度降低显著。In order to clarify the transient variation characteristics of the internal flow in the vertical axial-flow pump device,the computational fluid dynamics(CFD)is adopted to obtain the transient hydraulic characteristics of the blade area of the pump device under various operating conditions,and then the reliability of the numerical simulation is verified by a physical model test.The simulation results show that the area with large impeller inlet bias angle is mainly concentrated on the leading edge of the impeller.With the dynamic change of impeller rotation,the impeller outlet bias angle gradually increases from the hub to the rim,and the area with large guide vane outlet bias angle corresponds to the circumferential position of guide vane trailing edge.Under 1.2 Q_(bep)condition,the uniformity of axial velocity distribution at impeller inlet is 89.5%,and the weighted average angle of velocity is 82.9°.When the flow rate increases from 0.8 Q_(bep)to 1.2 Q bep,the average velocity circulation at the guide vane outlet is reduced by 12.1%.In the range of 0.8 Q_(bep)-1.2 Q_(bep),the minimum value of the average velocity circulation is 4.7 m^(2)/s,at which time the flow rate is 1.2 Q_(bep).The vortex structure characteristics at the outlet of the guide vane body is significant.The number of vortex structures from the inlet to the outlet of the guide vane body increases,but the vortex volume decreases,and the resultant velocity of the vortex structure decreases significantly.

关 键 词：轴流泵 泵装置 叶片 内流场 瞬态特性 数值分析 

分 类 号：TH3[机械工程—机械制造及自动化] TV675[水利工程—水利水电工程]