数值模拟中微厚透水物糙率处理方法探讨

水利工程数值模拟计算中常需科学合理地概化实际工程中的透水物糙率，以反映透水物对水流的真实影响。对微厚透水物在流体数值模拟中的糙率处理方法进行了探讨，提出了一种新的糙率概化方法，即对原状透水物进行水槽试验，通过假定明渠长度将局部水头损失换算成沿程水头损失，再将换算数值应用于数模计算中。以东太湖吴江区第一水厂集中供水水源地的蓝藻隔离栏为例，通过具体工程实践介绍其使用方法，为不规则孔眼透水物以及使用过程中性质发生较大改变的透水物糙率率定提供了新的思路。

Discussion on treatment method for roughness of slightly thick permeable object in numerical simulation

In numerical simulation calculation of hydraulic engineering, some permeable objects should be generalized scientifically and reasonably, so as to reflect the true influence of permeable object on water flow. The generalization is always a difficult problem in numerical simulation. The treatment method for roughness of slightly thick permeable object was discussed and a new generalization method was put forward. The local head loss was converted into frictional head loss through the flume experiment, and the conversion value was applied to numerical calculation. In the case of algae-resisting fences in water source area of Wujiang No. 1 Waterworks, located in Eastern Taihu Lake, the method was introduced by practical application. A new idea is provided to calibrate the roughness of permeable object with irregular apertures or with hydraulic characteristics that are easy to change during applications.