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| 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) |
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Abstract 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.
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Received: 21 December 2009
Published: 30 May 2010
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