双流道水力透平的性能预测与结构优化  

Performance prediction and structure optimization of double-channel hydraulic turbines

作　　者：蒋敦军 李仁年[2] 文玉立 权辉[2] 黄祺[2] 

机构地区：[1]上海东方泵业(集团)有限公司技术中心,上海201906 [2]兰州理工大学能源与动力工程学院,甘肃兰州730050 [3]三一汽车起重机械有限公司研究院,湖南长沙410600

出　　处：《兰州理工大学学报》2012年第5期48-52,共5页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51079066);甘肃省高校博士基金(0906ZXC124)

摘　　要：借鉴低比转速混流式水轮机的叶片设计原理与双吸泵的结构型式,设计出一种卧式双流道混流式水力透平机.为了对其结构进行优化,保证性能和最大化水能回收效率,又能最大限度地降低研究成本,对导水部件采用几种不同翼型导叶的方案进行了探讨.研究结果表明:利用传统的头部较厚的导叶不利于水流绕流,在导叶头部处能量损失严重,而添加头部修型的负曲率导叶的水力透平效率最优,且在小流量工况下其水力性能较其他方案好,表明该导叶应用工况范围广,选择该设计要求下水力透平的导叶,缩短了产品设计周期与节约了成本,为将来水力透平机的结构优化和性能预测提供了有益的理论和实际应用参考.A type of horizontal double-channel Francis hydraulic turbine was designed by using the blade design principle of low specific speed Francis turbine and the structural form of double-suction pump.In order to not only optimize its structure,ensure the performances and maximize the efficiency of water-power recovery,but also minimize its research costs,the guiding device with different guide vane profiles was explored.The research result indicated that,it was disadvantageous to flow around conventional guide vane with thick head,where the energy loss was serious.But the hydraulic turbine with negative curvature guide vane with its modified would exhibit head optimal efficiency and the hydraulic performance would be better than other options of guide vane in low flow rate conditions,showing that this guide vane could be used in a wide range of application conditions.Selecting it as hydraulic turbine guide vane to meet the requirement of the design,the product design cycle would be reduced and its saved,so that would cost,provide a useful theoretical and application reference for structural optimization and performance prediction of hydraulic turbine in future.

关 键 词：双流道 水力透平 导叶 性能预测 结构优化 

分 类 号：TK730.3[交通运输工程—轮机工程]