枢纽互通区平面二维水流数值模拟研究

The analysis of 2-D hydrodynamic numerical simulation of alternative interchange

从平面二维水动力学方程组出发,建立了二维水流运动的基本方程,模拟出桥区河道水流流场,并与实测成果比较,该数学模型与实际流场吻合较好,经综合分析,工程建设前后的水流流态基本一致,引起河道地形的变化局限在工程附近水域,对通航水流的影响很小。

Based on the difference equations for 2-D depth-averaged water flow, and established the main equations of 2-D water flow. This paper simulated the flow field of channel, and agreed well with the practical flow field. The mathematical model has better consistency with the actual flow field. By the comprehensive analysis, the result is that water flow regime were basically in accordance before and after engineering, the changes caused by river terrain are nearby the engineering water area, which has little effect on navigable flow.