过流阻水建筑物在二维平面水动力数值模拟中的处理方法

基于实际过流阻水建筑物的过流特性，利用内边界法、等效过流糙率修正法和等效过流地形修正法修正过流能力，以达到与真实过流特征等效的目的。通过应用于二维水动力数值水槽模型，比较分析3种方法在恒定流和非恒定流条件下的水位及流速计算效果。结果显示，内边界法和等效过流糙率修正法能如实反映过流阻水建筑物的过流和周围区域的流场特征，等效过流地形修正法因局部地形变化，模拟的流速和水位发生突变，误差相对较大。

Methods for processing water-blocking hydraulic structure in two-dimensional hydrodynamic numerical simulation

Based on the flow characteristics of an actual water-blocking hydraulic structure, the internal boundary method, the equivalent discharge roughness correction method, and the equivalent discharge topographic correction method were used to correct the discharge capacity, in order to fit the simulated discharge capacity with the actual discharge. Simulation of water level and flow velocity was conducted under the conditions of steady flow and unsteady flow in a two-dimensional hydrodynamic numerical flume model to compare the three methods. The results show that the former two methods can accurately reflect the discharge and the properties of the flow around the water-blocking hydraulic structure, and the water level and flow velocity simulated by the third method, due to the local topographic change, excessively deviated from the actual values.