小型混流式水泵水轮机损失分析与正交优化设计  

Loss analysis and design optimization of a small scale mixed-flow pump turbine using the orthogonal method

作　　者：严健儒 左志涛[1] 侯虎灿 周鑫[1] 陈海生[1,2] YAN Jianru1,2, ZUO Zhitao1, HOU Hucan1, ZHOU Xin1, CHEN Haisheng1,2(1Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; 2University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院工程热物理所,北京100190 [2]中国科学院大学,北京100049

出　　处：《储能科学与技术》2018年第5期913-920,共8页Energy Storage Science and Technology

基　　金：国家重点研发计划(2017YFB0903604);国家自然科学基金(51606188);中国科学院洁净能源先导科技专项(XDA20170200);中国科学院前沿科学重点研究项目(QYZDB-SSW-JSC023)

摘　　要：为了研究各部件对小型混流式水泵水轮机水泵工况和水轮机工况下水力性能的影响,对一小型水泵水轮机进行不同流量下的全流道数值模拟,针对两工况下总压损失集中的叶轮进行正交设计优化。应用L9(34)正交表,选取4个叶轮关键设计参数,以水泵工况扬程偏离率、效率和水轮机工况效率作为目标,进行4因素3水平的正交设计,并通过全流道数值模拟方法和极差分析方法进行选优。结果表明叶片出口直径对泵和水轮机工况性能影响最大,优化后水泵设计工况效率提高了1.06%,水轮机设计工况效率提高1.62%,其相应最优工况点因包角增加而向小流量工况移动。Numerical simulations were performed on a small scale pump turbine device under different flow conditions. The impeller on which the total pressure loss concentrates was optimized using the orthogonal method. A L9（3~4） orthogonal table was produced with four important design factors for an impeller at three levels. The optimization considered pump head deviation, pump efficiency and turbine efficiency. The results showed that the blade outlet diameter affected significantly the performance of pump turbine. Compared with the original baseline pump turbine, the optimized pump efficiency increased by 1.06% and the optimized turbine efficiency increased by 1.62% under the design conditions. Both the optimized efficiency points under the pump and turbine operating conditions moved toward to a low flow rate due to the augment of the wrap angle.

关 键 词：水泵水轮机 正交优化 水力设计 损失分析 

分 类 号：TK734[交通运输工程—轮机工程]