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| Numerical simulation research on inlet flow pattern of small sluice station side pumping station |
| LUO Can1*, LEI Shuaihao1, YUAN Yao2, CHENG Li1, DU Kang1 |
| 1. College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China; 2. Jiangsu Institute of Water Resources Research, Yangzhou, Jiangsu 225000, China |
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Abstract Based on the RANS equation and the RNG k-ε turbulence model, the numerical simulation of the inlet flow pattern of a small sluice station lateral water pumping station was carried out. And three different rectifying measures are proposed to improve the bad flow pattern in the sump of the original scheme. Then the flow pattern of each sump is observed and the axial velocity distribution uniformity, velocity weighted average angle and axial average flow velocity before the pump are analyzed. The results show that there are large recirculation zones in 1#—3# sumps under the original scheme, which extend from the inlet of the sump to the front of the inlet pipe, and the flow pattern is extremely harmful. By arranging airfoil deflectors or J-shaped diversion piers, the recirculation zone of 1# sump is reduced dramatically, and the recirculation zones of 2# and 3# sumps disappear. Moreover, the combined measure of J-shaped diversion piers and airfoil deflectors is the best rectifying measure to improve the flow pattern, the large recirculation zones in the sump disappear, the axial velocity distribution uniformity of the selected section increases by 12.2%, and the flow patterns are uniform and symmetric. The research result is helpful for the future rectification of the flow in the sump for other similar pump stations.
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Received: 13 January 2021
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