Numerical prediction of flow in Francis turbine with long and short blades
Ma Yue1, Zhang Haiku2, Liu Demin3, Liu Xiaobing4
1.Guodian Power Development in Dadu River Overhaul and Installation Co. Ltd., Leshan, Sichuan 614900, China; 2.Sichuan Electric Power Industry Commission & Test Institute, Chengdu, Sichuan 610072, China; 3.Dongfang Electric Corporation, Chengdu, Sichuan 611731, China; 4.School of Energy and Environment, Xihua University, Chengdu, Sichuan 610039, China
Abstract:The 3D turbulent flow in HLA542-LJ-130 turbine runner under the typical small flow rate condition was simulated in CFX by solving the 3D N-S equation with SST turbulent model. The flow information in various flow passage components was obtained. The calculation results show that the pressure reduces uniformly from the volute inlet to the outlet of the guide vane, while the velocity vector increases uniformly. In addition, the symmetry of velocity and pressure distributions on the circumferential direction is good. The pressure reduces uniformly on the long and short blades from the inlet edge to the outlet edge of the blade, and the pressure distribution is relatively reasonable. There is no obvious recirculation and secondary flow on the working surface of the blade. The streamline distribution is smooth, and the pressure and velocity distributions on the inlet of the draft tube are basically symmetrical, while the pressure is uniformly distributed along the radial direction. There are vortexes in the straight taper section of the draft tube which has the same rotation direction with the runner. These vortexes develop to the end of the draft tube without obvious eccentricity, and they are weakened in the diffuser section. This study has important guiding significance for the selection and design of turbines in high-head hydropower stations.
马越, 张海库, 刘德民, 刘小兵. 长短叶片混流式水轮机内部流动数值预测[J]. 排灌机械工程学报, 2013, 31(10): 879-883.
Ma Yue, Zhang Haiku, Liu Demin, Liu Xiaobing. Numerical prediction of flow in Francis turbine with long and short blades. Journal of Drainage and Irrigation Machinery Engin, 2013, 31(10): 879-883.
[1]Saeed R A,Galybin A N, Popov V. Modeling of flow-induced stresses in a Francis turbine runner[J].Advances in Engineering Software, 2010, 41(12): 1245-1255.[2]袁寿其, 薛菲, 袁建平, 等.离心泵压力脉动对流动噪声影响的试验研究[J]. 排灌机械, 2009, 27(5): 287-290. Yuan Shouqi, Xue Fei, Yuan Jianping, et al. Experimental study on impact of pressure fluctuation on flow-noise in centrifugal pump[J]. Drainage and Irrigation Machinery, 2009, 27(5): 287-290.(in Chinese)[3]齐学义, 冯俊豪, 李纯良, 等. 三维湍流流动计算在混流式转轮水力设计中的应用[J]. 兰州理工大学学报, 2006, 32(5): 48-52. Qi Xueyi, Feng Junhao, Li Chunliang, et al. Application of 3D viscous flow calculation to hydraulic design of Francis turbine[J]. Journal of Lanzhou University of Technology, 2006, 32(5): 48-52.(in Chinese)[4]廖翠林, 王福军. X型叶片水轮机转轮流场的数值模拟[J]. 水力发电学报, 2008, 27(3): 141-144. Liao Cuilin, Wang Fujun. Numerical simulation of 3D flow in Francis turbine runner with X-type blades[J]. Journal of Hydroelectric Engineering, 2008, 27(3): 141-144.(in Chinese)[5]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.[6]Liu Xiaobing. Analysis of basset force of particle motion in turbulent flows by spectral method[J]. Journal of Hydrodynamics, 2001, 13(4): 89-91.[7]Liu Xiaobing. Studies of solid-liquid two-phase turbulent flows and wear in hydraulic turbomachinery[J]. Journal of Hydrodynamics, 1996(2): 72-76.[8]徐朝晖,徐东海,吴玉林,等.水泵与水轮机空化状态监测与诊断的研究进展[J].农业机械学报,2003,34(1):139-142. Xu Zhaohui,Xu Donghai,Wu Yulin,et al.Monitor and diagnose of cavitation in pump and hydroturbine [J].Transactions of the Chinese Society for Agricultural Machinery,2003,34(1): 139-142.(in Chinese)[9]郭鹏程, 罗兴绮, 郑小波,等. 混流式水轮机内三维定常湍流数值研究[J]. 水动力学研究与进展:A辑,2006,21(2):181-189. Guo Pengcheng, Luo Xingqi, Zheng Xiaobo, et al. Numerical investigation of three-dimension turbulent flow fields in a Francis turbine[J]. Journal of Hydrodyna-mics:Ser A, 2006, 21(2): 181-189.(in Chinese)[10]胡秀成, 张思青, 张立翔. 基于CFD的长短叶片水轮机转轮研究[J]. 水电能源科学, 2009,27(3): 144-146. Hu Xiucheng,Zhang Siqing,Zhang Lixiang. Research on Francis turbine runner with long and short blades based on CFD[J]. Water Resources and Power,2009,27(3): 144-146.(in Chinese)[11]侯祎华,齐学义,张静,等.超高水头混流式长短叶片转轮内部流动数值模拟[J].兰州理工大学学报,2009, 35(2): 46-50. Hou Yihua, Qi Xueyi, Zhang Jing, et al. Numerical simulation of internal flow in ultra-high head Francis runner with splitter blades[J].Journal of Lanzhou University of Technology,2009, 35(2): 46-50.(in Chinese)[12]崔宝玲,朱祖超,林勇刚,等. 长短叶片半开式离心叶轮内部流动的数值模拟[J]. 浙江大学学报:工学版, 2007, 41(5): 809-813. Cui Baoling, Zhu Zuchao, Lin Yonggang, et al. Nume-rical simulation of flow in semi-open centrifugal impeller with long-short blade[J]. Journal of Zhejiang University:Engineering Science, 2007, 41(5): 809-813.(in Chinese)[13]刘小兵,张海库,李跃文,等. 基于UG软件平台的混流式水轮机转轮三维造型[J]. 水电能源科学, 2008, 26(6): 129-131. Liu Xiaobing,Zhang Haiku,Li Yuewen, et al. 3D model for Francis hydraulic turbine based on UG software platform[J]. Water Resources and Power,2008, 26(6): 129-131.(in Chinese)[14]Xiao Huimin, Yu Bo. Hydraulic design of water turbine based on the computational fluid dynamics[C]//Proceedings of 2010 International Conference on Electrical and Control Engineering. Piscataway: IEEE, 2010: 2789-2792.[15]曾锴.计算风工程入口湍流条件改进与分离涡模拟[D]. 上海:同济大学航空航天与力学学院,2007.[16]金亮. 高超声速飞行器机体/发动机一体化构型设计与性能研究[D]. 湖南:国防科学技术大学航天科学与工程学院, 2008.