|
|
CFD simulation of shutdown transient process of pumped storage power station under pump conditions |
Zhang Languo1,2, Zhou Daqing1, Chen Huixiang3 |
1.College of Energy and Electrical Engineering, Hohai University, Nanjing, Jiangsu 211100, China; 2.Power China Beijing Enginee-ring Corporation Limited, Beijing 100024, China; 3.College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, Jiangsu 210098, China |
|
|
Abstract Three-dimensional unsteady numerical simulations, combined with the normal single-phase model and the VOF model, were executed on the geometrical model of the whole flow system of a pumped storage power station. Through numerical calculation, the changeable flow configuration and variation law of some parameters, such as unit rotating speed, flux, runner moment and pressure of measurement points were obtained and compared with experimental data. Results show that the extreme value of unit rotating speed and measurement points pressure agree fairly well with experimental data. In the shutdown transient process, pressure variation at spiral casing inlet and draft tube inlet is influe-nced by the closure law of guide vanes, while that between runner and guide vanes is mainly affected by runner rotation. As guide vanes close and flux decreases, water flows upstream through the inner side of the draft tube and rotates with the runner. After guide vanes close completely, vortex inside the draft tube is the key factor of its hydraulic energy loss.
|
Received: 06 November 2013
|
|
|
|
[1]张建,郑源.抽水蓄能技术[M].南京:河海大学出版社,2011.[2]张春.抽水蓄能电站一管多机相继甩负荷过渡过程研究[J].水利水电技术,2011,42(12):66-70,83. Zhang Chun. Study on transition process of load successive rejection of multiple units per penstock in pumped storage hydropower power station[J]. Water Resources and Hydropower Engineering,2011,42(12):66-70,83.(in Chinese)[3]蒋玮,张健.输水洞径对可逆式机组相继甩负荷尾水进口压力影响[J]. 水电能源科学,2013,31(10):159-163. Jiang Wei, Zhang Jian. Influence of water conveyance tunnel diameter on pressure at draft tube inlet of reversible units load successive rejection[J]. Water Resources and Power, 2013,31(10):159-163.(in Chinese)[4]刘延泽,常近时.灯泡贯流式水轮机装置甩负荷过渡过程基于内特性解析理论的数值计算方法[J].中国农业大学学报,2008,13(1):89-93. Liu Yanze,Chang Jinshi. Numerical method based on internal character for load rejection transient calculation of a bulb turbine installation[J].Journal of China Agricultural University,2008,13(1):89-93.(in Chinese)[5]周大庆,吴玉林,刘树红.轴流式水轮机模型飞逸过程三维湍流数值模拟[J].水利学报,2010,41(2):233-238. Zhou Daqing,Wu Yulin,Liu Shuhong. Three-dimensional CFD simulation of the runaway transients of a propeller turbine model[J].Journal of Hydraulic Engineering,2010,41(2):233-238.(in Chinese)[6]李金伟,刘树红,周大庆,等.混流式水轮机飞逸暂态过程的三维非定常湍流计算Ⅰ[J].水力发电学报,2008,27(6):148-152. Li Jinwei,Liu Shuhong,Zhou Daqing,et al. 3D unsteady turbulent simulation of the runaway transients of the Francis turbine[J].Journal of Hydroelectric Enginee-ring,2008,27(6):148-152.(in Chinese)[7]Li J, Yu J, Wu Y. 3D unsteady turbulent simulations of transients of the Francis turbine[C]//25th IAHR Symposium on Hydraulic Machinery and Systems: Earth and Environmental Science. Timisoara: IAHR Symposium,2010,12: 1-10.[8]Cherny S,Chirkov D,Bannikov D,et al.3D numerical simulation of transient processes in hydraulic turbines[C]//25th IAHR Symposium on Hydraulic Machinery and Systems: Earth and Environmental Science. Timisoara:IAHR Symposium,2010,12: 71-81.[9]Yang Shuai, Chen Xin, Wu Dazhuan, et al. Dynamic analysis of the pump system based on MOC—CFD coupled method[J]. Annals of Nuclear Energy, 2015,78:60-69.[10]Zhang Xiaoxi, Cheng Yongguang, Yang Jiandong, et al. Simulation of the load rejection transient process of a francis turbine by using a 1-D-3-D coupling approach[J]. Journal of Hydrodynamics, 2014,26(5):715-724.[11]张健,方杰,范波芹.VOF方法理论与应用综述[J].水利水电科技进展,2005,25(2):67-70. Zhang Jian,Fang Jie,Fan Boqin.Advances in research of VOF method[J].Advances in Science and Technology of Water Resources,2005,25(2):67-70.(in Chinese)[12]王福军.计算流体动力学分析[M].北京:清华大学出版社,2004.[13]Qian Zhongdong, Hu Xiaoqing, Huai Wenxin,et al. Numerical simulation and analysis of water flow over stepped spillways[J].Science in China,Series E: Technological Sciences, 2009, 52(7):1958-1965.[14]Liu Zhen, Shi Hongda,Liu Yun. Numerical simulation of water flow over an oscillating hydrofoil using realizable k-ε turbulence model[J]. Journal of Harbin Enginee-ring University,2008,29(6):628-634.[15]周大庆,张蓝国.抽水蓄能电站泵工况断电过渡过程数值试验[J].华中科技大学学报:自然科学版,2014,42(2):16-20. Zhou Daqing,Zhang Languo. Numerical experiments in power-off transients process of pumped storage power station under pump condition[J].Journal of Huazhong University of Science and Technology:Natural Science Edition, 2014,42(2):16-20.(in Chinese) |
|
|
|