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| 土石坝漫顶过程水力特性分析 | |
| 引用本文： | 李云,王晓刚,刘火箭,宣国祥,曾晨军. 土石坝漫顶过程水力特性分析[J]. 水动力学研究与进展(A辑), 2012, 27(2): 147-153 |
| 作者姓名： | 李云 王晓刚 刘火箭 宣国祥 曾晨军 |
| 作者单位： | 1. 南京水利科学研究院,南京210029;水文水资源与水利工程科学国家重点实验室,南京210098 2. 南京水利科学研究院,南京,210029 3. 南京水利科学研究院,南京210029;河海大学水利水电学院,南京210098 |
| 基金项目： | 水利部公益性行业科研专项经费项目，"十一五"国家科技支撑计划项目 |
| 摘 要： | 土石坝漫顶过程极其复杂,溃决过程研究成果存在诸多争议。采用标准k~ε紊流模型和VOF方法对土石坝水流漫顶过程进行了水气两相流数值模拟,对漫顶过程水流流态、流速分布等进行了详细分析,揭示了坝面切应力分布规律。该规律的发现可以用于解释笔者先前提出的"落点冲蚀"猜想及"剪剥式"冲蚀理论,即漫顶条件下最先发生冲蚀的部位可能在坝坡中上部,漫顶冲蚀以台阶式冲蚀为溃决的主要特征。 |
| 关 键 词： | 土石坝 紊流模型 数值模拟 漫顶水流 切应力 |
Overtopping hydraulic characteristics of earth-rock dam |
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| LI Yun , WANG Xiao-gang , LIU Huo-jian , XUAN Guo-xiang , ZENG Chen-jun. Overtopping hydraulic characteristics of earth-rock dam[J]. Chinese Journal of Hydrodynamics, 2012, 27(2): 147-153 | |
| Authors: | LI Yun WANG Xiao-gang LIU Huo-jian XUAN Guo-xiang ZENG Chen-jun |
| Affiliation: | 1(1.Nanjing Hydraulic Research Institute,Nanjing 210029,China; 2.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing 210098,China; 3.College of Water Resources and Electric Power,Hohai University,Nanjing 210098,China) |
| Abstract: | The dam breach formation under overtopping condition is very complex and there are many disputes about it.In the paper,the turbulence model was used to close Reynolds time-averaged equation and the volume of fluid(VOF) method was used to track the free face.The numerical simulation model was used for analysis the flow pattern and the velocity distribution on the surface of earth-rock dam due to overtopping in detail.The results show the shear stress distribution rules on the surface of dam,which can be used for explaining why the first erosion place may be appeared at the upper part of dam and the stepped erosion is the mainly form. |
| Keywords: | earth-rock dam turbulence model numerical simulation overtopping shear stress s |
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