| 摘要: |
| 省水系统类型选择和设计是省水船闸输水系统的重难点之一，互通式和独立式两种型式分别在小清河3座省水船闸中应用，但这两种型式下闸室输水水力特性尚不明晰。通过建立互通式和独立式布置下金家堰省水船闸整体输水系统三维数学模型，分析省水池向闸室输水过程中闸室水体流速分布、消能特性、船舶泊稳条件。研究结果表明，互通式布置下，最大流量时刻，上闸首格栅室正、顶支孔出流不均匀，下闸首消力槛处洄旋显著，导致流速空间分布不均匀，省水池对侧且靠近下闸首的水体紊动显著，输水过程产生的长波运动会在闸室中部显著叠加，导致较大的水面纵向比降；独立式布置下，闸室流场分布对称性强，横支廊道侧支孔出流均匀，水面平稳，较互通式泊稳条件更优。在现有的布置条件下，独立式布置的闸室水流条件优于互通式，若采用互通式方案，需要优化上下闸首消能工。 |
| 关键词: 省水船闸 互通式省水系统 支孔流量 水流条件 数值模拟 |
| DOI： |
| 分类号:U461 |
| 基金项目:国家重点研发计划项目(2023YFC3206100)；山东省交通规划设计院集团有限公司科技计划项目(KJ-2021-SJYJT-03)。 |
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| Comparative Analysis of Flow Conditions in Lock Chamber of Filling and Emptying System between Interconnected and Independent Water-Saving Locks |
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ZHANG Yihao1, WANG Shuguang1, DONG Siyuan1, YE Zihao2, YU Xiaotong2
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1.Shandong Provincial Communications Planning and Design Institute;2.College of Harbor,Coastal and Offshore Engineering,Hohai University
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| Abstract: |
| The selection and design of the water-saving filling and emptying system is one of the key problems in the water saving locks. There are two arrangements of water-saving filling and emptying system, one is interconnected and the other is independent type. Both types have been applied in three water-saving locks located in Xiaoqing River. However, the hydraulic characteristics of the water transfer in the lock chambers under the two types of system are not clear yet. A three dimensional numerical model for the filling and emptying system of Jinjiayan Lock is established to investigate the hydraulic characteristics of filling process from the water-saving pool to the lock chamber. The flow field within the lock chamber, energy dissipation properties, berthing stability condition were analyzed. The results show that, at the maximum flow moment, under the interconnected arrangement, the flow rate distribution of the upper and front ports in the grid stilling chamber of the upper lock head is not uniform. There is also significant eddy near the baffle sill of the lower lock head. These lead to the nonuniform flow field in the lock chamber, and significant turbulence of water body far away from the water-saving pool and close to the lower lock head. In addition, the incoming flow from the upper and lower head will be superimposed in the middle of the chamber, which results in a larger longitudinal water surface slope, and unfavorable to the berthing stability. Under the independent arrangement, the flow field in the lock chamber is symmetrical, and the flow rate distribution of the side ports is uniform. The water surface is smooth and favorable for berthing stability. In terms of hydraulic characteristics, the independent arrangement is better than the interconnected one. It is necessary to optimize the energy dissipator in the upper and lower lock head if the interconnected arrangement is adopted. |
| Key words: water-saving lock interconnected filling and emptying system flow rate of port flow conditions numerical simulation |
