摘要
本文采用标准双方程紊流模型数值模拟了三峡工程永久船闸阀门启闭过程中,门井段流场的动态变化过程,并对数值模拟结果进行了动态演示。数模结果表明顶扩方案水流在阀门后及门井中形成回流,阀门开度越小,则门后回流区范围越大;而底扩方案在跌坎后形成三角形的强回流区,阀门后形成范围较大的椭圆形回流区,门井中也会产生回流,但流速相对较小。数值模拟结果与物理模型试验结果进行了对比,表明该数学模型可以较高精度地模拟出阀门井段流场,获得各节点的水力学参数如流速及水头值。将数模软件研究与计算机可视化技术相结合,使该数模计算成果能够直接为工程设计和施工服务,在永久船闸的冲泄水方案制定中。
The standard k-ε turbulent model is employed to simulate the unstable flow field of conveyance system in the Three Gorges Project. VOF method is used to follow the variation of free surface in the valve well. The schemes of top expanding and bottom expanding have been simulated. The numerical results are demonstrated in real time, it shows that bigger circumfluence appears behind the valve gate both in the bottom and the top expanding. Strong turbulence has also been found in the well of valve while the velocity is quite small. Good agreements are obtained between the numerical results and experimental data. Hydraulic parameters such as water level and velocity are given by the numerical simulation method in any arbitrarily points, which has been used as DSS in ship lock operation. The present work provides a good foundation of further study of cavitation in conveyance system.
出处
《水力发电学报》
EI
CSCD
北大核心
2005年第3期88-92,共5页
Journal of Hydroelectric Engineering
关键词
水工结构
数值模拟
紊流模型
输水廊道
永久船闸
三峡工程
hydraulic structure
numerical simulation
turbulent flow
conveyance system
ship lock
Three Gorges Project(TGP)
