超大坡度谷坡复杂地形守恒溃坝洪水模拟  

Dam Break Flooding Conservative Simulation at Extreme Complex Topographic Steep Valley and Slope

作　　者：向波[1] 周杰 于普兵[3] 李晓伟[1] 王勇[2] Xiang Bo;Zhou Jie;Yu Pubing;Li Xiaowei;Wang Yong(Beijing Engineering Corporation Limited,Beijing 100024,China;Nanjing Hydraulic Research Institute,Nanjing 210029,China;Zhejiang Institute of Hydraulics&Estuary,Hangzhou 310020,China)

机构地区：[1]中国电建集团北京勘测设计研究院有限公司,北京100024 [2]水利部交通运输部国家能源局南京水利科学研究院,南京210029 [3]浙江省水利河口研究院,杭州310020

出　　处：《水动力学研究与进展（A辑）》2023年第3期363-370,共8页Chinese Journal of Hydrodynamics

基　　金：江苏省水利科技项目(2018001);浙江省自然科学基金项目(LZ22E090003)。

摘　　要：由于溃坝洪水波前流速大,洪水演进时地形复杂多变,给溃坝洪水模拟带来了极大挑战。因此,模型的质量和能量守恒性及溃坝波传播速度一直都是数值模拟中的难点。该文提出了基于重力引力的动量修正单元冻结法来处理模拟过程中的反复干湿过程,以适用于超大坡度复杂地形溃坝洪水演进模拟。模型验证及应用结果表明,能较好地改善模型的质量和能量守恒,具有普遍推广的实用意义。Due to the large wave front velocity of dam break flood and the complex terrain during flood routing,dam break flood simulation has brought great challenges.The conservation of mass and energy of the model and the propagation velocity of dam break wave are always the most difficulties in numerical simulation.In this paper,the momentum modified element freezing method based on gravity is proposed to deal with the repeating dry and wet processes in the simulation,which is suitable for the simulation of dam break flood routing in extreme steep and complex terrain.The results of model validation and application show that the conservation of mass and energy can be improved,which is of practical value for application.

关 键 词：溃坝 洪水演进 数值模拟 干湿处理 

分 类 号：TV147.3[水利工程—水力学及河流动力学]