新型竖井贯流泵装置研发与数值分析  

Development and numerical analysis of new-type shaft tubular pumping system

作　　者：朱红耕[1] 戴龙洋 张仁田[1,3] 朱国贤 吕赛军 费海蓉 

机构地区：[1]扬州大学水利科学与工程学院,江苏扬州225009 [2]盐城市水利勘测设计研究院,江苏盐城224002 [3]江苏省水利勘测设计研究院有限公司,江苏扬州225009 [4]盐城市水利工程管理处,江苏盐城224002

出　　处：《排灌机械工程学报》2011年第5期418-422,共5页Journal of Drainage and Irrigation Machinery Engineering

基　　金：'十一五'国家科技支撑计划项目(2006BAB04A03);江苏省水利科技项目(2010023);江苏省水利动力工程重点实验室开放课题(K100016)

摘　　要：在分析不同贯流泵装置的结构特征和常用断流方式技术特点的基础上,针对城市防洪泵站扬程低、年运行时间较短、安全可靠性要求高的特点,设计了一种竖井进水、虹吸出水和真空破坏阀断流的新型竖井贯流泵装置.以盐城市某泵站工程为例,运用计算流体动力学方法,利用RNG k-ε湍流模型闭合雷诺时均N-S动量方程组,以适应具有较大曲率的虹吸式出水流道内部流动,采用多重参考坐标系方法(MRF)处理叶片动静耦合,采用SIMPLEC算法实现压力与速度的耦合求解,对该新型竖井贯流泵装置的模型进行了数值分析和性能预测.计算结果表明:经初步优化设计的新型贯流泵装置模型,内部流态平顺,在设计扬程为1.15 m、流量为0.326 m3/s的工况下,装置效率达56.0%;在最高扬程为1.95 m、流量为0.296 m3/s的工况下,装置效率达到68.8%.Based on comparing structural features of different tubular pumping systems and technical characteristics of cut-off devices in common use,aiming at the characteristics of low head,shorter annual operation time and higher safety and reliability requirements of city flood-control pumping stations,a new-type shaft tubular pumping system was invented,which is composed of a shaft suction box,a tubular pump and a siphon-type discharge passage with a vacuum breaker valve as cutoff device.Taking a real pumping station in Yancheng city as an example,the computational fluid dynamics method was adopted to analyze the internal flow of the new-type model tubular pumping system and predict its energy performances.The time-averaged Navier-Storks equations were closed by RNG k-ε turbulent model to adapt internal flow of siphon-type discharge passage with larger curvatures.The method of multi-reference frame（MRF） was used to deal with the coupling of rotating impeller and static guide vane,and SIMPLEC algorithm was adopted to achieve the coupling solution of velocity and pressure.Computational results show that the internal flow of the new-type shaft tubular pumping system through preliminary optimization is smooth,and the model pumping system efficiency reaches 56.0% when the design head and the relevant discharge are 1.15 m and 0.326 m3/s respectively,and up to 68.8% when the maximum head and the relevant discharge are 1.95 m and 0.296 m3/s respectively.

关 键 词：竖井式贯流泵装置 断流方式 内部流态 数值分析 性能预测 城市防洪 

分 类 号：S277.9[农业科学—农业水土工程] TV131.4[农业科学—农业工程]