首页 | 本学科首页   官方微博 | 高级检索  
     

多股多层水平淹没射流数值模拟研究
引用本文:杨忠超,邓军,杨永全,张建民. 多股多层水平淹没射流数值模拟研究[J]. 水利学报, 2004, 35(5): 0031-0038
作者姓名:杨忠超  邓军  杨永全  张建民
作者单位:四川大学,高速水力学国家重点实验室,四川,成都,610065
摘    要:多股多层水平淹没射流是一种新型消能型式。本文采用VOF(Volume of Fluid)法和RNG k-ε紊流模型结合向家坝水电工程对多股多层水平淹没射流进行了三维数值模拟,将计算值与实验值进行了对比,计算值与实测值吻合较好,表明数值模拟方法是研究消力池水流运动规律及消能机理的有效途径。文中分析讨论了多股多层射流进入消力池后的水流结构与消能机理,研究结果表明:多股、多层射流进入消能水体时,在各主流的四周有一个消能旋滚,形成多个强剪切层消能区,消能率较高,但在平面上没有形成明显的、贯穿的立轴旋涡。同时,由于各漩滚的相互作用,能有效减小对消力池固壁的冲刷。

关 键 词:多股多层淹没射流;三维流场;紊流数值模拟;VOF法
文章编号:0559-9350(2004)05-0031-08
修稿时间:2002-11-16

Numerical simulation of multiple submerged jets on multilevel dicharged into plunge pool
YANG Zhong-chao. Numerical simulation of multiple submerged jets on multilevel dicharged into plunge pool[J]. Journal of Hydraulic Engineering, 2004, 35(5): 0031-0038
Authors:YANG Zhong-chao
Affiliation:Sichuan University, Chengdu 610065, China
Abstract:The horizontal multiple submerged jets at different levels discharged into plunge pool is utilized as a new type of energy dissipater for high dam. In his paper, the 3-D energy dissipation process of submerged jets discharged from spillways and mid-level outlets at different levels dropped into plunge pool of Xiangjiaba Hydro Project is simulated numerically. The validity of the simulation result is verified by experimental data. On this basis, the flow structure and mechanism of energy dissipation of this kind of energy dissipater are further studied with this numerical model. It is found that an eddy surrounding the main stream of the multiple jets exists forming several strong shear flows and enhancing the effect of energy dissipation. At the same time, the effect of erosion on plunge pool wall is reduced due to the interaction among eddies.
Keywords:multiple submerged jets at multilevel   plunge pool   3-D f low field   numerical simulation of turbulent flow   volume of fluid (VOF) method
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《水利学报》浏览原始摘要信息
点击此处可从《水利学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号