平面水流数值模拟在涉水桥梁防洪影响中的应用  

Application of Plane Water Flow Numerical Simulation in River Flood Control of a Wading Bridge

作　　者：王川[1] 程伟平[1] 陈一帆[2] 

机构地区：[1]浙江大学水工结构与水环境研究所,杭州310058 [2]浙江省水利河口研究院,杭州310020

出　　处：《科技通报》2014年第11期35-40,共6页Bulletin of Science and Technology

基　　金：水体污染控制与治理国家科技重大专项(2008ZX07421-006);浙江省重点科技创新团队项目(2010R50035)

摘　　要：为了评价涉水桥梁建设对河道防洪的影响,采用基于非结构化网格系统的有限体积法,构建了一个河道水流平面二维流场数值模拟模型,用于模拟不同洪水频次条件下桥梁所处河道的平面二维流场,以便获取桥梁建设前后详细的水位、流速及其变化情况,为涉水桥梁规划、设计及河道行洪安全提供技术支撑。通过实例应用与分析,检验了模型对含涉水桥梁河道平面二维流场的模拟能力。结果表明:本文构建的河道平面水流数值模拟模型能够有效地应用于涉水桥梁的防洪影响评价,计算精度高、结果可靠,具有较高的实际应用价值。To evaluate the influence of a wading bridge to the river flood control, the finite volume method based on unstructured network system is used to build a two-dimensional flow field numerical simulation model. It is used to simulate the two-dimensional flow field in the river under different frequencies of flood and get the water lever, flow velocity and how they change after building the bridge. It can supply technical support for planning and design of the wading bridge and the safety of river flood. By application and analysis of a living example, the capacity to simulate the two-dimensional flow field containing a wading bridge is examined. It turns out that plane water flow numerical simulation model built by this paper can be effectively applicated to evaluate the influence of a wading bridge to the river flood control. The calculation accuracy is high and the result is reliable. It has a high value for practical application.

关 键 词：河道平面水流数值模拟 有限体积法 桥梁 防洪影响评价 

分 类 号：TV133[水利工程—水力学及河流动力学]