| 摘要: |
| 船闸泄水时易形成往复流、回流等不良流态,从而影响下引航道水流条件,严重威胁船舶通航和停泊安全。本研究依托于木京双线船闸水利枢纽,针对下游引航道通航水流条件和横向水流速度超标等问题,进行三维精细数值模拟研究。基于RNG k -ε紊流模型,对比不同泄水时长条件下,双线船闸同时泄水时的水流条件,详细分析各方案水力特性。结果表明,双线船闸泄水时下引航道水流特性受地形条件和泄流流量影响显著,引起水流间相互作用、引发共用下引航道通航水流条件超标等问题,导致船舶航行和停泊条件恶化。采用本文所提出的优化泄水方案—出水口优化及旁侧泄水,可显著改善引航道内水流流态,减小纵向流速,保障安全通航。本文研究成果可为其他类似水利枢纽工程提供技术支持。 |
| 关键词: 船闸泄水 下引航道 出水口布置 水力特性 旁侧泄水 |
| DOI： |
| 分类号:U617 |
| 基金项目:国家重点研发资助项目(2023YFC3206104) |
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| Numerical study on the optimal arrangement of double-lane ship lock discharge method |
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HE Jinchao1, WU Lv2, ZHOU Xidong3, XIE Chunhang3, YUAN Hao1
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1.Southwest Water Conservancy and Water Transport Engineering Research Institute,Chongqing Jiaotong University;2.College of Shipping and Marine Engineering,Chongqing Jiaotong University;3.School of River and Ocean Engineering,Chongqing Jiaotong University
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| Abstract: |
| It is easy to form reciprocating flow, backflow and other undesirable flow patterns when filling and draining water in the lock, thus affecting the water flow conditions in the approach channel and seriously threatening the safety of ship navigation and berthing. This paper relies on the Mukyo double-lane lock hydraulic hub to carry out a three-dimensional fine numerical simulation study for the downstream approach channel navigable current conditions and transverse current velocity exceeding the standard and other problems. Based on the RNG k-ε turbulence model, we compare the flow conditions of the two-lane locks when they are simultaneously discharging water under different discharge durations, and analyse the hydraulic characteristics of each scheme in detail. The results show that the water flow in the lower approach channel during the release of water from the double-lane locks is significantly affected by the topographic conditions and the released flow, which causes the interaction between the currents, triggers the exceeding of the navigational flow conditions in the shared approach channel, and leads to the deterioration of the navigation and berthing conditions of the ships. Adopting the optimized water discharge scheme proposed in this paper - outlet optimization and side discharge - can significantly improve the flow pattern in the approach channel, reduce the longitudinal flow velocity, and ensure safe navigation. The research results of this paper can provide technical support for other similar hydraulic hub projects. |
| Key words: Drainage of sluice gates Lower approach channel Water Outlet Arrangement hydraulic property Side drain |
