摘要
为研究多孔出流泄洪消能特性与场地振动响应,文章以向家坝工程为例,参考原型调度情况,模拟4种不同调度方式下的泄洪过程,得到4种计算工况下流场、冲击压强、紊动能与紊动强度值,从水动力学角度分析不同调度方式下的消能特性以及消力池处紊动强度与场地振动响应的关系。结果表明:各计算工况泄洪消能效果良好;泄流量一定且开启孔口数相同时,通过改变孔口调度方式可进一步提升消能率;消力池底板和边墙处紊动强度计算幅值与原型观测振动加速度峰值显著相关,其中底板处紊动强度与场地振动正相关,边墙处紊动强度与场地振动负相关。根据计算结果,文中提出可供实际工程参考的优选调度方案。
In order to study the energy dissipation characteristics and site vibration response of multi-sluice dam flood discharge, this paper simulated the flood discharge process under four dispatching conditions, based on the prototype of Xiangjiaba Project. The flow field, impact pressure, turbulence kinetic energy and turbulence intensity were obtained. The energy dissipation characteristics under four calculation conditions were analyzed from the perspective of hydrodynamics, and the correlation analysis between turbulence intensity and site vibration response at the stilling basin was conducted. The results show that the energy dissipation effect is good in each calculation condition. The energy dissipation rate can be further improved by adjusting the dispatching mode under the condition that the discharge is constant, and the numbers of opening orifices are the same. The calculated peak turbulence intensity at the bottom floor and the side wall of the basin is significantly correlated with the peak vibration acceleration observed by the prototype. The floor turbulence intensity is positively correlated with the field vibration, while the side wall turbulence intensity is negatively correlated with it. According to the calculation results, an optimal dispatching scheme for practical engineering was proposed.
作者
阿蓉
牛志攀
Arong;NIU Zhipan(School of Civil and Hydraulic Engineering,Hefei University of Technology,Hefei 230009,China;State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,China;Institute for Disaster Management and Reconstruction,Sichuan University,Chengdu 610207,China)
出处
《合肥工业大学学报（自然科学版）》
CAS
北大核心
2022年第10期1360-1365,1378,共7页
Journal of Hefei University of Technology：Natural Science
基金
国家自然科学基金资助项目(51409181)
四川省应用基础研究资助项目(2020YJ0321)
合肥工业大学科研启动专项资助基金资助项目(XC2018JZSZ05)。
关键词
泄洪消能
泄洪调度
场地振动
紊动强度
数值模拟
flood discharge and energy dissipation
flood discharge dispatching
site vibration
turbulence intensity
numerical simulation
