Numerical simulation for fluid meliorating in both forebay and suction bay of pumping stations
Liu Xinyang1, Gao Chuanchang1, Shi Liwen2, Liu Wei2
(1.Institute of Electric Power, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou, Henan 450011,China; 2.Tianshan Electric Irrigation Management Office, Jinan, Shandong 250400, China)
According to the jet feature under the sluice that formed by the water level difference in Tianshan first-stage pumping station, the efforts of fluid meliorating were put forward. The RANS equation and standard k-ε turbulence model were used to simulate the flow state, and the influence of sediment on he water flow was not taken into consideration during the simulating process. Due to the attempts of adopting discontinuous bottom sills, discontinuous trajectory sills and pressurized water board, the results show that the jet length is shorten significantly, the surface backflow disappears, the cross-section velocity distribution tends to uniform, and the velocity at the bottom of the forebay and suction bay and near the pump inlet decreases significantly. The field investigations show that the modifications adopted increase the device efficiency by 1.82% and 5.96% respectively. The vibration amplitude decreases 21 μm and 52 μm, and the sediment accumulation almost disappears in both operating conditions.
LIU Xin-Yang,GAO Chuan-Chang,SHI Li-Wen et al. Numerical simulation for fluid meliorating in both forebay and suction bay of pumping stations[J]. Journal of Drainage and Irrigation Machinery Engin, 2010, 28(3): 242-246.
Lu Xiaoru, Tong Hongwei, Feng Jiangang. Measures of improving flow patterns for entrance bays of city intake water pumping stations[J]. Drainage and Irrigation Machinery, 2007, 25(5):24-28.(in Chinese)
Zhou Longcai, Li Xiaoyi, Song Yuansheng. Numerical simulation of turbulent flow in recycled water pump intake sump of thermal power plant[C]∥2009 Asia-Pacific Power and Energy Engineering Conference. Piscataway: Inst of Elec and Elec Eng Computer Society, 2009.
Cheng Li, Liu Chao, Zhou Jiren, et al. Three dimensional numerical simulation of flow field inside a reversible pumping station with symmetric aerofoil blade[C]∥2008 Proceedings of the ASME Fluids Engineering Division Summer Conference. New York: American Society of Mechanical Engineers, 2009,1(B): 1089-1095.
Lu Linguang, Xu Lei, Liang Jindong,et al. Numerical simulation for 3D turbulent flow and hydraulic loss of inlet conduit for pumping station[J]. Drainage and Irrigation Machinery, 2008, 26(5):55-58.(in Chinese)
Stockstill Richard L, Berger R C.Simulation of flow in hydraulic structures using ADH[C]∥Bridging the Gap: Meeting the World′s Water and Environmental Resources Challenges-Proceedings of the World Water and Environmental Resources Congress 2001. Reston: American Society of Civil Engineers, 2004.