V、U形库区断面下滑坡涌浪传播的数值模拟研究  

Numerical Simulation of Propagation of Landslide Surge in V-shaped and U-shaped Reservoir Sections

作　　者：张万举 闫毅志[1] 李梓萌 王文雄 沈智敏 ZHANG Wan-ju;YAN Yi-zhi;LI Zi-meng;WANG Wen-xiong;SHEN Zhi-min(Eleetrical Power Engineering Building,Kunming University of Science and Technology,Kumming 650500,China;Huaneng Lancangjiang River Hydropower INC,Kunming 650500,China)

机构地区：[1]昆明理工大学电力工程学院,云南昆明650500 [2]华能澜沧江水电股份有限公司,云南昆明650500

出　　处：《水电能源科学》2022年第8期101-104,共4页Water Resources and Power

基　　金：云南省高校水生态和水流结构工程重点实验室(241620190055)。

摘　　要：库区滑坡涌浪的发生会对水工建筑物及下游的安全造成很大威胁,但不同库区断面会影响涌浪的传播过程,因此研究不同库区断面特征下滑坡涌浪的传播过程十分必要。先通过数值模拟与已有的试验结果进行对比,验证了FLUENT软件数值模拟的可行性。再以某河谷库段为原型,建立二维V、U形库区断面有限元模型,研究不同滑速、水深及入射角度下涌浪的传播规律。结果表明,在库区水深和水面宽度相等的情况下,V、U形断面中涌浪的变化情况基本一致;随着滑块入水速度的增加,两种断面特征下的最大浪高均呈线性增加,且V形库区断面的影响显著性更大;对于V形库区,当水面宽深比为1.155且水深为50 m时,将产生沿河岸向上的高速冲击性涌浪,该情况最为不利。The occurrence of landslide surge has caused great threat to hydraulic structures and downstream safety.The wave propagation process will be affected by different reservoir sections,so it is necessary to study the landslide surge under different reservoir sections characteristics.Firstly,the feasibility of numerical simulation on FLUENT software was verified by comparing the numerical simulation with the existing experimental results.Secondly,taking a valley section as the prototype,a two-dimensional finite element model was established to study the propagation law of landslide surge on the V-shaped and U-shaped reservoir sections under different sliding speed,water depth and incident angle.The results show that the variation of surge in V-shaped and U-shaped sections is basically the same when the water depth and water surface width are equal.With the increase of water inflow velocity of sliding block,the maximum wave height under the two cross-section characteristics increases linearly,and the influence of V-shaped reservoir section is more significant.For the V-shaped reservoir area,when the ratio of width to depth is 1.155 and the water depth is 50 m,the high-speed impact surge along the river bank will occur,which is the most unfavorable situation.

关 键 词：断面形状 涌浪传播 数值模拟 宽深比 

分 类 号：TV139.23[水利工程—水力学及河流动力学]