分蓄洪区内河渠边界模拟方法  

Numerical simulation of canals boundary in flood diversion and detention area

作　　者：张小峰[1] 白洋[1] 屈文谦[1] 张强[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2009年第4期409-412,共4页Engineering Journal of Wuhan University

基　　金：国家"973"计划项目(编号:2007CB714106);国家自然科学基金资助项目(编号:50579054)

摘　　要：针对目前分蓄洪区内河渠边界模拟精度不高的问题,提出采用斜对角笛卡尔方法来处理分蓄洪区内沿网格斜对角方向布置的河渠边界问题,扩展了笛卡尔坐标系下平面二维水流数学模型功能,同时又改善了笛卡尔坐标方法锯齿边界拟合精度差的缺点.通过概化模型的计算,证明了该模型在理论上和方法上都是可行的,较好地解决了以往分蓄洪区河渠边界沿网格线布置精度不高的问题,使河渠边界流场更加合理.该方法可用于模拟分蓄洪区内含堤防和河渠对洪水演进的影响,为防洪调度提供参考.For there is no high accuracy to simulate the issues of canals boundary in flood diversion and detention area, the diagonal Cartesian method is proposed to solve the issues of canals boundary which are disposed along the diagonal mesh line in flood diversion and detention area, which expands the functions of the mathematical model of the two dimensional water flow in Cartesian coordinate system and improves the flaws of poor simulative precision in saw-tooth boundary with Cartesian coordinate method. Through the calculations of two generalized models, it is proved that the model is feasible in theory and methods. It can solve the issues of poor precision of canals which are disposed along the mesh line in flood diversion and detention area in the past, so that the flow next to the canals boundary become more reasonable. This method can be used for simulating the flood routing in flood diversion and detention area that contains canals and embankments so as to provide a reference for flood control operation.

关 键 词：分蓄洪区 洪水演进 河渠边界 斜对角笛卡儿方法 

分 类 号：TV131[水利工程—水力学及河流动力学]