高拱坝水舌作用下水垫塘流场的二维数值模拟  

The 2-D Numerical Simulation Flow Field of Plunge Pool Acted by Jets from High Arch Dam

作　　者：丰小玲[1,2] 孙建[1] 郝秀玲[1] 张发茂[1] 

机构地区：[1]西安理工大学水利水电学院,陕西西安710048 [2]中国水利水电第三工程局有限公司设计分院,陕西西安710016

出　　处：《西安理工大学学报》2009年第2期217-222,共6页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(50279040)

摘　　要：应用RNGk-ε紊流数值模型,采用二维VOF方法,对溪洛渡拱坝表孔泄洪和表深孔空中碰撞泄洪两种工况下的水垫塘流场进行了数值模拟,给出了水舌从空中抛射或碰撞,下泄至水垫塘并发展到塘内流动稳定的全过程以及流动稳定后的水垫塘流速矢量和底板压强分布图、水垫塘底板最大压强和近壁最大流速的脉动过程。计算结果与溪洛渡相应的实测值以及其他文献计算的最大底板压强和近壁流速吻合较好,说明数值计算方法合理且结果可靠。By applying RNG k-ε turbulence model and VOF method, 2-D numerical simulation was made to the flow field of plunge pool by discharge from the surface outlet or the surface-middle outlets on Xiluodu arch dam to give the whole process of the flow movement which includes jet going from the exit or impacting in air, then into the plunge pool and developing to the flow stabilization, the velocity vectorgraph, the wall pressure distribution and the fluctuating process of top wall pressure and the maximal flow velocity near the wall. The calculated results show that the maximal wall pressure and the maximal velocity near the wall have a good agreement with the experiment from Xiluodu and also with the calculated results by other literature, which proved that the simulation results is reasonable and reliable.

关 键 词：水垫塘 VOF RNG k-ε 紊流模型 

分 类 号：TV131.3[水利工程—水力学及河流动力学]