虹吸式出水流道水力特性分析与试验验证  

Numerical Simulation and Experimental Analysis of Siphon Water Discharge Passage

作　　者：张文鹏 袁尧 孙丹丹 汤方平[1] 石丽建 王朝飞 焦海峰 ZHANG Wenpeng;YUAN Yao;SUN Dandan;TANG Fangping;SHI Lijian;WANG Chaofei;JIAO Haifeng(College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou 225009,China;Jiangsu Institute of Water Resources Research,Nanjing 210017,China;Institute of Water Conservancy Works Design of Xuzhou,Xuzhou 221000,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]江苏省水利科学研究院,江苏南京210017 [3]徐州市水利建筑设计研究院,江苏徐州221000

出　　处：《应用基础与工程科学学报》2022年第2期295-306,共12页Journal of Basic Science and Engineering

基　　金：国家自然科学基金项目(51376155);江苏省水利科技项目(2017031);江苏高校优势学科建设工程资助项目(PAPD)。

摘　　要：为了研究虹吸式出水流道水力特性,基于某立式轴流泵装置,采用数值模拟与模型试验相结合的方法,首先根据泵装置布置形式和初步设计尺寸,开发了虹吸式出水流道参数化设计软件,极大地缩短了设计周期.然后对4种虹吸式出水流道方案进行了全流道数值计算,并根据计算结果对虹吸式出水流道进行定量分析.最后将数值模拟结果与模型试验结果进行了对比.数值模拟结果表明,受叶轮旋转影响,虹吸出水流道上升段存在偏流现象;改变驼峰段断面尺寸对上、下游流态影响显著;下降段极易产生脱流和漩涡,改善下降段的不良流态可以显著降低出水流道的水力损失.对3种虹吸出水流道评价指标进行比较,指出了用轴向流速分布均匀度来评判虹吸出水流道的不足.模型试验结果表明,数值模拟与模型试验的外特性结果吻合较好,验证了数值模拟的可靠性;设计的带有虹吸式出水流道的立式泵装置最高效率为78.85%.研究结果可以为同类泵装置设计提供参考.Based on a vertical axial-flow pump device, the hydraulic characteristics of siphon discharge passage were studied by combining numerical simulation and experiment.Firstly, according to the layout and preliminary size of the pump device, a special parameterization design software for siphon discharge passage was developed, greatly shortened the design cycle.Secondly, four forms of siphon discharge passage were designed and 8 vertical planes were inserted into the siphon discharge passage to analyze the internal flow pattern.Finally, the numerical simulation results were compared with the experimental results.Numerical simulation results show that the rising section of the siphon discharge passage is seriously affected by the impeller.There is a large range of tangential flow in the hump plane, it is unreasonable to evaluate the siphon discharge passage by the axial flow velocity distribution uniformity.In the falling section is easy to generate backflow and vortex, which is an important factor causing the difference of hydraulic loss in different schemes.Experimental results show that the numerical simulation results are reliable, the efficiency of the pump device is 78.85%.This article can provide a reference for the design of parallel pump devices.

关 键 词：泵装置 轴流泵 虹吸出水流道 数值模拟 试验 水力损失 

分 类 号：TV131[水利工程—水力学及河流动力学]