低水头枢纽消力墩位置对消能效果的影响  

Influence of low-head hydraulic stilling pier's location on energy dissipating effect

作　　者：张宇[1] 刘晓平[1] 苏天宇[1] 罗鹏飞[1] 叶玉康 

机构地区：[1]长沙理工大学,湖南长沙410076

出　　处：《水运工程》2016年第5期88-91,共4页Port & Waterway Engineering

摘　　要：低水头枢纽通常采用消力池底流消能的方式来消减泄水闸下泄水流的能量,而消力墩的位置对水跃的形式、强弱影响较大,从而影响整个消力池的消能率。采用计算流体力学软件Fluent的VOF模型,探讨消力墩位置对消力池内水跃特征、湍动能耗散率分布及消能率的影响。结果表明:消力墩位置会影响消力池消能率——消力墩布置在消力池长度的0.65及以上时,其消能效果与不布置消力墩时相差不大;消力墩布置在消力池长度的0.35处时,消力池的消能率最大,比布置在0.65时消能率提高约10.5%。For the low-head hydro-junction,we usually adopt the way of stilling basin＇ s bottom underflow energy-dissipation to reduce the sluice discharge＇ s flow energy.The location of the baffle pier has a great influence on the form and strength of the hydraulic jump, which affects the dissipation of the stilling basin. Adopting the computational fluid dynamics software Fluent＇ s VOF model,we investigate the effects of the location of the baffle pier on the stilling basin,inland waters jump＇ s characteristics,distribution of the turbulent kinetic energy dissipation rate and energy dissipation ratio.The results show that the location of baffle pier will affect the stilling basin energy dissipation.When the baffle pier is arranged at the 0. 65 and above length of the baffle basin, there is a tiny difference about the effect of energy dissipation; When the baffle pier is arranged at the 0. 35 length of the baffle basin,the energy dissipation ratio of stilling basin is the maximum, with a 5% energy dissipation improvement comparing that when the baffle pier is arranged at the 0. 65.

关 键 词：消力池 消力墩 消能率 VOF 

分 类 号：TV653.1[水利工程—水利水电工程] U64[交通运输工程—船舶及航道工程]