悬栅消力池压强特性研究及优化  

Study and Optimization of Pressure Characteristics of Suspended Grid Stilling Basin

作　　者：周凯 牧振伟[1,2] 赵乾 高尚 ZHOU Kai;MU Zhen-wei;ZHAO Qian;GAO Shang(College of Hydraulic and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Xinjiang Key Laboratory of Hydraulic Engineering Security and Water Disasters 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：《水电能源科学》2023年第10期128-132,共5页Water Resources and Power

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：为了解决悬栅消力池由于时均压强过大产生底板失稳及悬栅压强破坏的问题,采用数值模拟的方法,在设计及校核流量下,对4种不同布置形式悬栅消力池内水位差及压强场进行研究,并在稳水效果较好的方案4基础上提出趾墩-悬栅联合及圆化悬栅2种消力池优化方案。结果表明,趾墩-悬栅联合优化方案相较于方案4在设计及校核流量下,底板时均压强最大分别降低63%、50%,有效降低了消力池内悬栅上表面C与下表面D之间的时均压强差值∣Δp2∣;圆化悬栅优化方案可使悬栅处总压强分布更加均匀,避免悬栅局部破坏。故针对有压强要求的大流量悬栅消力池,建议选择趾墩-悬栅联合辅助消能工消能方式。In order to solve the problem of instability of the bottom plate and pressure damage of the suspended grid due to the excessive time-average pressure in the suspended grid stilling basin,numerical simulation was used to study the water level difference and pressure field in four different arrangements of the suspended grille under the design and calibration flow.Two optimization schemes of the combined toe pier-suspended grille and circularized suspended grille were proposed on the basis of the scheme 4 with better water stabilization effect.The results show that the combined toe pier-hanging grille optimisation scheme can reduce the time-average pressure at the bottom plate by 63% and 50% compared to scheme 4 at the design and calibration flow rates,effectively reducing the difference in the time-average pressure ∣Δp_(2)∣ between the upper surface C and the lower surface D of the grille in the basin.The rounded grille optimisation scheme can make the total pressure distribution at the grille more uniform and avoid local damage to the grille.Therefore,it is recommended to choose a combined auxiliary energy dissipation method of toe pier-suspended grille for high flow stilling basin with pressure requirements.

关 键 词：底流消力池 悬栅 时均动水压强 水位差 数值模拟 

分 类 号：TV131.6[水利工程—水力学及河流动力学]