库区几何要素对溃坝洪水特性影响的模拟研究  

Numerical research on reservoir geometrical element effect of dam-break flood

作　　者：黄子奇 张建丰[1] 李涛[1] 胡晖[1] 高泽海 杜佰林 HUANG Ziqi;ZHANG Jianfeng;LI Tao;HU Hui;GAO Zehai;DU Bailin(State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学西北旱区生态水利国家重点实验室,陕西西安710048

出　　处：《西安理工大学学报》2021年第2期222-228,260,共8页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(51609197);陕西省教育厅重点实验室科研计划资助项目(16Js084);陕西省自然科学基金资助项目(2021JQ-481);西安市科技计划资助项目(2020KJRC0086)。

摘　　要：为了研究水库蓄水深度、水库宽度和长度等库区几何要素对溃坝洪水特性的影响,采用Flow-3D建立了数值水槽模型。通过物理模型实验验证了模拟值的合理性。随后,进行了一系列数值模拟。结果表明,各观测断面的洪峰流量、最大水深和溃坝波速随水库深度的增加而增加,峰现时间也随之提前。各观测断面的洪峰流量随水库宽度增加而增加,而最大水深、溃坝波速和峰现时间基本不变。沿程各断面洪峰流量随着水库长度的增加而增加,而溃坝波速、坝址断面洪峰流量和洪峰时间基本不变,沿程各断面峰现时间推迟。In order to investigate the influence of reservoir geometrical elements,such as reservoir depth,reservoir width and length,on the dam-break hydrodynamic characteristics,a numerical model of flume is built by Flow-3D.The rationality of simulation values is verified by physical model experiments,and subsequently,a series of numerical simulations are carried out.The results reveal that the peak discharge,maximum water depth and dam-break wave velocity of each observation section increase with reservoir depth,and that the time to peak is advanced at the same time.The peak discharge of each observation section increases with reservoir width,while the maximum water depth,dam-break wave velocity and time to peak keeps basically unchanged.The peak discharge along the river increases with reservoir length,while the dam-break wave velocity,the peak discharge and time to peak of the dam site section are basically unchanged,and the time to peak along the river is delayed.

关 键 词：溃坝洪水 Flow-3D 水力特性 水槽实验 数值模拟 

分 类 号：TV122.4[水利工程—水文学及水资源]