溃坝洪水演进数值模拟研究  

Numerical Simulation of 2D Dam-break Flood Waves

作　　者：戎贵文[1] 魏文礼[1] 严建军 

机构地区：[1]西安理工大学水利水电学院,西安710048 [2]西安普迈项目管理有限公司,西安710068

出　　处：《黑龙江水专学报》2008年第3期12-14,共3页Journal of Heilongjiang Hydraulic Engineering College

摘　　要：采用基于MacCormack预测——校正技术的隐式数值格式求解控制水流运动的二维浅水方程,建立了模拟大坝瞬间全溃或局部溃倒所致的洪水演进过程的数学模型。应用该模型对单宽一维瞬间溃坝的水位、流速进行了数值计算,并与理论解进行了比较;最后用该模型预测了矩形河道中大坝瞬间局部溃倒时的洪水演进过程,并对模拟结果进行了定性分析。算例说明该数学模型对模拟溃坝洪水波很有效。This paper is concerned with a mathematical model for numerical simulation of 2D flood waves due to complete or partial dam-break. The governing equations are solved by using an implicit bidiagonal numerical scheme, based on the MacCormack＇s predictor-corrector technique. The mathematical model is used to numerically compute the water surface profiles and velocity distributions of 1D dam-break flow in a rectangular open channel; and the numerical results are compared with the theoretical results. And it is also used to predict 2D flood waves due to partial instantaneous dam-break in a rectangular open channel, and the reliability of numerical results is analyzed. The comparison and the analysis show that the proposed method is accurate, reliable and effective in simulation of dam-break flood waves.

关 键 词：溃坝洪水波 数值模拟 隐式格式 

分 类 号：TV122.4[水利工程—水文学及水资源]