琴键堰泄流能力数值模拟研究  

Numerical Simulation of Discharge Capacity of Piano-key Weir

作　　者：王翔宇 池丽敏 刘学德 邵雨辰 WANG Xiangyu;CHI Limin;LIU Xuede;SHAO Yuchen(Nanjing Water Resources Planning and Design Institute Co.,Ltd,Nanjing 210001,China)

机构地区：[1]南京市水利规划设计院股份有限公司,江苏南京210001

出　　处：《河南水利与南水北调》2022年第11期81-83,91,共4页Henan Water Resources & South-to-North Water Diversion

基　　金：国家自然科学基金项目(51109022);大连理工大学海岸和近海工程重点实验室开放基金项目(LP1205)。

摘　　要：气候异常变化导致极端洪涝灾害频发,对已建工程提高泄流能力是非常迫切的课题。琴键堰作为新型的迷宫堰,以具有更强的泄流能力和受地形限制小的特点而被广泛运用。通过调试琴键堰进出口宽度,可以达到改善泄流能力的目的。为此,运用FLOW-3D软件对琴键堰泄流能力进行数值模拟,得到琴键堰在不同的进出口宽度条件下的流态、堰上水头、泄流系数和消能率等水力特性。结果表明,进出口宽度一定时,来流水深越大,堰上水头越大,泄流系数越大,消能率越大。来流水深一定时,进口宫室宽度越小,出口宫室越大;进出口宽度等于2.40 m时,堰上水头最小,泄流系数越大,消能率越小。Abnormal climate change leads to frequent extreme flood disasters, which is very urgent to improve the discharge capacity of built projects. As a new type of maze weir, the piano key barrier is widely used for its stronger discharge capacity and the small limitation caused by the terrain. By adjusting the inlet and outlet width of the discharge weir can be improved. Therefore, FLOW-3D software is used to simulate the discharge capacity of the weir numerical, and to obtain the flow state, weir head, discharge coefficient and energy dissipation rate of the weir under different inlet and export width conditions. The results show that when the inlet and outlet width is certain, the greater the inflow water depth, the greater the water head on the weir, the greater the discharge coefficient, and the greater the energy dissipation rate. When the inflow depth is certain, the smaller the inlet palace width, the larger theoutlet palace;when the inlet and outlet width is equal to 2.40 m, the minimum water head on the weir, the greater the discharge coefficient, the smaller the energy dissipation rate.

关 键 词：琴键堰 泄流能力 数值模拟研究 进出口宫室宽度 

分 类 号：TV6[水利工程—水利水电工程]