大型泵站进水流道技术改造优选设计  

Optimal design of inlet conduit for technical innovation of large pumping stations

作　　者：朱红耕[1] 袁寿其[2] 

机构地区：[1]扬州大学水利科学与工程学院,江苏扬州225009 [2]江苏大学流体中心,江苏镇江212013

出　　处：《水力发电学报》2006年第2期51-55,共5页Journal of Hydroelectric Engineering

基　　金：十五攻关项目(ZZ02-03-01-04/05-01);水利部科技创新项目(SCX2003-12);江苏高校省级重点实验室开放课题(KJS03087);江苏省教育厅指导性计划项目(LK0410185)

摘　　要：进水流道的出口流态决定了水泵的进水条件,直接影响到水泵的能量性能、汽蚀性能和安全运行性能,在进水流道水力设计和模型试验中应给予特别重视。本文采用数值计算的方法,模拟了南水北调东线工程某大型泵站不同进水流道设计方案时的内部三维流动,计算结果与模型试验和泵站运行中观察到的实际情况相当吻合。把水泵进水条件和流道水头损失作为流道水力设计的目标函数,通过计算机数值模拟和优选,获得了优秀的进水流道设计方案。流道出口水流轴向流速的分布均匀度提高了3.26%,出口水流的偏流角减小了1°,水头损失减少了24.1%,水泵的进水条件得到了大幅度的改善。The flow conditions of a pump are determined by the outlet flow patterns of inlet conduit which will affect directly the energy and cavitation characteristics as well as the safety operation of the pump. Special attentions should be paid to the hydraulic design and model test of inlet canduit. Numerical computations are adopted in this paper to simulate the flow patterns of different inlet conduit design schemes of a pumping station in the Eastern Route Project of South-to -North Water Transfer Project, the computation results are considerably consistent with that observed in the model test and in the running of the pumping station. Taking the inflow conditions of pump and the head loss as the objective functions of hydraulic design of inlet conduits, an optimal design scheme is obtained by the numerical simulation and optimization, the distribution uniformity of outlet axial velocity is raised by 3.26%, the velocityweighted current bias angle of outlet flow and the head loss of inlet conduit are decreased by 1° and 24.1% respectively. It is evident that inflow conditions of the pump are significantly improved.

关 键 词：水力机械 进水流道 优化设计 数值模拟 泵站 

分 类 号：TV136.2[水利工程—水力学及河流动力学]