底流消力池墩栅联合消能工水力特性数值模拟研究  

Numerical simulation of hydraulic characteristics of pier-fence joint dissipators in underflow dissipation basins

作　　者：周凯 牧振伟[1,2] 周镇 赵乾 ZHOU Kai;MU Zhenwei;ZHOU Zhen;ZHAO Qian(College of Hydraulic and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Xinjiang Key Laboratory of Hydraulic Engineering Safety and Water Disaster Prevention,Urumqi 830052,China)

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052 [2]新疆水利工程安全与水灾害防治重点实验室,新疆乌鲁木齐830052

出　　处：《水资源与水工程学报》2023年第2期142-148,156,共8页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(52269019、51469031);新疆维吾尔自治区高校科研计划创新团队项目(XJEDU2017T004)。

摘　　要：针对低弗汝德数底流消力池消能不充分、流态紊乱及底板时均动水压强过大而造成失稳破坏的问题,通过采用数值模拟的方法,对传统消力池内分别加设趾墩-悬栅、消力墩-悬栅、T型墩-悬栅联合辅助消能工,分析各联合辅助消能工的水力特性及消能规律。结果表明:消力池内布置3种墩栅联合辅助消能工后,相较于传统消力池,水面流态趋于平稳,消力池底板最大时均动水压强分别减小了50%、25%、12.5%,消能率分别提高了3.13%、6.06%、5.24%;相较于同种墩型消力池(未加悬栅),消力池底板最大时均动水压强分别减小了20%、25%、12.5%,消能率分别提高了0.17%、3.05%、0.39%;趾墩、消力墩、T型墩与悬栅辅助消能工联合运用具有优势叠加效应。本研究可为解决同类底流消能问题提供参考。To address the problems of insufficient energy dissipation,turbulent flow patterns and unstable damage caused by excessive dynamic water pressure on the bottom plate of underflow dissipation basins with low Froude number,the conventional dissipation pools were equipped with joint auxiliary energy dissipators such as toe pier-suspended fence,dissipation pier-suspended fence,T-shaped pier-suspended fence,then the hydraulic characteristics and energy dissipation law of each joint auxiliary energy dissipator was analyzed using numerical simulation method.The results show that after the arrangement of the joint auxiliary energy dissipators in the dissipation basin,the water surface flow pattern tends to be smoother compared with the conventional dissipation basin,the maximum hourly mean dynamic water pressure on the bottom plate of the underflow dissipation basin is decreased by 50%,25%and 12.5%,and the energy dissipation rate is increased by 3.13%,6.06%and 5.24%,respectively;compared with the same pier-type dissipation basin(without suspended fence),the maximum hourly mean dynamic water pressure on the bottom plate of the dissipation basin is reduced by 20%,25%and 12.5%,and the energy dissipation rate is increased by 0.17%,3.05%and 0.39%,respectively.It is concluded that the combined use of auxiliary energy dissipaors of toe piers,dissipation piers,T-shaped piers and suspended fence has a superposition of advantages,and the study can provide a new way of thinking for similar underflow energy dissipation problems.

关 键 词：底流消能 消力池 联合辅助消能工 时均动水压强 消能率 数值模拟 

分 类 号：TV653[水利工程—水利水电工程]