基于CFD的竖井贯流泵装置进出水流道及前导叶优化  

Research on the Channeland Front Guide Vane of the Shaft Tubular Pump Unit Based on CFD

作　　者：钱忠裕 周晓润 焦海峰 夏珠峰 陈松山 QIAN Zhong-yu;ZHOU Xiao-run;JIAO Hai-feng;XIA Zhu-feng;CHEN Song-shan(School of Electrical and Energy Power Engineering,Yangzhou University,Yangzhou 225009,Jiangsu Province,China)

机构地区：[1]扬州大学电气与能源动力工程学院,江苏扬州225127

出　　处：《中国农村水利水电》2022年第5期101-106,112,共7页China Rural Water and Hydropower

基　　金：江苏省研究生创新工程(XKYCX19_092)。

摘　　要：以某竖井贯流泵站为研究对象,针对竖井尾部距叶轮中心距离、上下收缩型线,出水流道单边扩散角,前导叶位置及尺寸参数设计了4个进水流道方案、3个出水流道方案和5个前导叶方案,利用CFD数值模拟方法对方案进行计算分析,并采用模型试验验证了数值计算结果的准确性。结果表明:进水流道出口断面的流速均匀度随着竖井尾部距叶轮中心距离减小而逐渐减小;进水流道收缩段平滑的上下型线能够减小水力损失;出水流道单边扩散角缩小至4.52°时,流道内脱流现象明显减弱;加装前导叶会使泵装置效率下降%左右,随着导叶出口距叶轮中心距离减小,进水流道出口断面流速均匀度会小幅下降,导叶越长,其水力损失越大。Taking a shaft tubular pump station as the research object,four inlet channel schemes,three outlet channel schemes and five front guide vane schemes are designed according to the distance between the shaft tail and the impeller center,the upper and lower contraction profile,the unilateral diffusion angle of the outlet channel,the position and size parameters of the front guide vane.The schemes are calculated and analyzed by CFD numerical simulation method.The accuracy of the numerical results is verified by model tests.The results show that the distance between the shaft tail and the impeller center mainly affects the velocity uniformity of the outlet section of the inlet channel.The smooth upper and lower profile of the contraction section of the inlet channel can reduce hydraulic loss.When the unilateral diffusion angle of the outlet channel is reduced to 4.52°,the flow separation phenomenon in the channel is obviously weakened.The installation of the front guide vane will reduce the efficiency of the pump device by about 1%.With the decrease in the distance between the guide vane outlet and the impeller center,the flow velocity uniformity at the outlet section of the inlet channel will decrease slightly.The longer the guide vane,the greater the hydraulic loss.

关 键 词：竖井贯流泵装置 前导叶 进出水流道 水力性能 数值模拟 模型试验 

分 类 号：TV131[水利工程—水力学及河流动力学]