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| Numerical analysis and prediction of hydraulic performance of vertical axial-flow pump system model |
| WANG Lihui1, SHI Wei1, SHEN Changrong1, XU Lei2 |
| 1.Jiangsu Water Source Company Ltd. of the Eastern Route of the Eastern Route of the South-to-North Water Diversion Project, Nanjing, Jiangsu 210029, China; 2.School of Hydraulic, Energy and Power Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China |
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Abstract Relying on the design parameters of a low head pumping station in the first phase of east route in the South-to-North Water Diversion Project, the flow in a low head vertical flow pump system model, which consists of an elbow inlet channel, axial flow pump itself and siphon outlet conduit, is simulated based on the steady, 3D, turbulent, Reynolds averaged N-S equations and RNG k-ε turbulence model. The flow pattern in the model and the pressure distribution on the impeller blade surfaces are analysed under three typical conditions, namely, small discharge(0.180 m3/s), design discharge(0.299 m3/s)and large discharge(0.360 m3/s). The hydraulic performance of the pump model is predicted and compared with the test result. The results indicate that the numerical results are basically consistent with the test data, especially at the best efficiency point, and the maximum error is less than 2% within the flow rate interested. Under design flow condition, the 3D turbulent flows in the inlet and outlet conduits are basically the same as the flows in the inlet and outlet conduits when they are simulated separately. The flow fields in the inlet conduit remain the same under different operating conditions, but these in the outlet conduit don′t. Nonetheless, in the paper, the outcomes in 3D turbulent flow in the vertical axial flow pump system model under different operating conditions can provide a reference for the study on optimum hydraulic design of a low-head pump system under multi-operation condition.
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Received: 10 March 2016
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| [1]施卫东, 张德胜, 关醒凡, 等. 后置灯泡式贯流泵装置模型的优化与试验研究[J]. 水利学报, 2010,41(10): 1248-1254. SHI Weidong, ZHANG Desheng, GUAN Xingfan, et al. Optimization and experimental investigation on post bulb type tubular pump device model[J]. Journal of hydraulic engineering, 2010,41(10):1248-1254.(in Chinese)[2]成立, 薛坚, 刘超, 等. CFD技术在泵装置水力优化设计中的应用[J]. 南水北调与水利科技, 2007,5(3): 33-37. CHENG Li, XUE Jian, LIU Chao, et al. Application of CFD on hydraulic optimal design of pumping station[J]. South-to-North water transfers and water science & technology, 2007,5(3):33-37.(in Chinese)[3]金燕, 梁豪杰, 刘超, 等. 前置灯泡贯流泵装置内部流动数值模拟[J]. 扬州大学学报(自然科学版), 2013, 16(1): 71-74. JIN Yan, LIANG Haojie, LIU Chao, et al. Numerical simulation of the internal flow of pre-positive bulb tubular pumping system[J]. Journal of Yangzhou University(natural science editon), 2013,16(1):71-74.(in Chinese)[4]郑源, 肖玉平, 刘文明, 等. 大型竖井式贯流泵装置的数值模拟与性能预测[J]. 排灌机械, 2009, 27(6): 393-397. ZHENG Yuan, XIAO Yuping, LIU Wenming, et al. Numerical simulation and performance prediction for large-scale shaft-well tubular pump unit[J]. Drainage and irrigation machinery, 2009, 27(6): 393-397.(in Chinese)[5]杨帆, 刘超, 汤方平, 等. 竖井贯流泵装置内部流动数值模拟与性能分析[J]. 水力发电学报, 2014,33(1): 178-184. YANG Fan, LIU Chao, TANG Fangping, et al. Numerical simulation of 3D internal flow and performance analysis of the shaft tubular pump system[J]. Journal of hydroelectric engineering, 2014,33(1):178-184.(in Chinese)[6]刘超, 杨帆, 金燕, 等. 高效 S 形轴伸贯流泵装置内流动特性研究[J]. 水力发电学报, 2014,33(5):198-203. LIU Chao, YANG Fan, JIN Yan, et al. Numerical study on high efficiency S-shaped shaft extension tubular pump system[J]. Journal of hydroelectric engineering, 2014,33(5):198-203.(in Chinese)[7]李龙, 王泽. 轴伸式贯流泵装置全流场三维湍流数值模拟[J]. 机械工程学报, 2007, 43(10): 62-66. LI Long, WANG Ze. Numerical simulation of 3D viscous flow in tubular pumping station on dual-directional operation[J]. Chinese journal of mechanical engineering, 2007,43(10):62-66.(in Chinese)[8]WANG Zhengwei, PENG Guangjie, ZHOU Lingjiu, et al. Hydraulic performance of a large slanted axial-flow pump[J]. Engineering computations, 2010,27(2):243-256.[9]LI Yaojun, WANG Fujun. Numerical investigation of performance of an axial-flow pump with inducer[J]. Journal of hydrodynamics, Ser B, 2007,19(6):705-711.[10]杨帆, 刘超, 汤方平, 等. 大型立式轴流泵装置流道内部流动特性分析[J]. 农业机械学报, 2011, 42(5): 39-43. YANG Fan, LIU Chao, TANG Fangping, et al. Characteristics of flow in large vertical axial flow pumping System[J]. Transactions of the CSAM, 2011, 42(5): 39-43.(in Chinese)[11]刘君, 华学坤, 郑源, 等. 低扬程立式轴流泵装置模型马鞍形区研究[J]. 南水北调与水利科技, 2011,9(4): 34-38. LIU Jun, HUA Xuekun, ZHENG Yuan, et al. Study on performance of saddle zone in low lift vertical axial flow pump system model[J]. South-to-North water transfers and water science & technology, 2011,9(4):34-38.(in Chinese)[12]冯俊, 郑源, 罗欣. 后置导叶对立式轴流泵装置性能影响[J]. 水电能源科学, 2012, 30(8): 126-128. FENG Jun, ZHENG Yuan, LUO Xin. Effects of guide vane on performance of axial flow pump system[J]. Water resource and power, 2012,30(8):126-128.(in Chinese)[13]刘宁, 汪易森, 张纲. 南水北调工程水泵模型同台测试[M]. 北京: 中国水利水电出版社, 2006.[14]王福军. 计算流体动力学分析——CFD软件原理与应用[M]. 北京: 清华大学出版社, 2004.[15]ZHANG Desheng, SHI Weidong, CHEN Bin, et al. Unsteady flow analysis and experimental investigation of axial-flow pump[J]. Journal of hydrodynamics, Ser B, 2010, 22(1): 35-43.[16]任嘉,张瑶,沈正帆. 基于修正RNG k-ε模型的叶片泵非设计工况数值模拟[J]. 舰船科学技术, 2014,36(10):101-105. REN Jia,ZHANG Yao,SHEN Zhengfan. Numerical prediction for performance of centrifugal pump under off-design operation with modified RNG k-ε turbulence model[J]. Ship science and technology, 2014,36(10):101-105.(in Chinese)[17]TANG Fangping, WANG Guoqiang. Influence of outlet guide vanes upon performances of waterjet axial-flow pump[J]. Journal of ship mechanics, 2006,10(6): 19-26.[18]朱荣生, 胡自强, 付强. 双叶片泵内压力脉动的数值模拟[J]. 农业工程学报, 2010, 26(6): 129-134. ZHU Rongsheng, HU Ziqiang, FU Qiang. Numerical simulation of pressure fluctuation in double-blade pump[J]. Transactions of the CSAE, 2010,26(6):129-134.(in Chinese)[19]陆林广. 高性能大型低扬程泵装置优化水力设计[M].北京: 中国水利水电出版社, 2013[20]张德虎, 廖锐, 陈新方. 水力机械多功能模型试验台[J]. 能源研究与利用, 2002(4): 30-48. ZHANG Dehu, LIAO Rui, CHEN Xinfang. Model test rig for hydraulic mechanical multi function[J]. Energy research and utilization, 2002(4):30-48.(in Chinese)[21]中华人民共和国水利部. 水泵模型及装置模型验收试验规程:SL 140—2006[S]. 北京: 中国水利水电出版社, 2007.[22]河海大学. 南水北调东线工程泗阳泵站水泵装置模型试验研究报告[R]. 南京: 河海大学, 2010. |
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