复合模型在串流河道水工模型试验研究中的应用

Application of composite model in research of hydraulic model test of jointed-up river channels

为了研究南水北调中线北汝河倒虹吸工程实施后,不同频率洪水下河道水势的变化情况及其对倒虹吸建筑物的影响,针对大洪水时北汝河、石河、肖楼北沟、二十里铺沟等河流相互串流的特点,采用了数学模型与物理模型相结合的方法进行对比分析。通过对大区域水流运动的数值计算来给出小区域的横向边界与水流运动参数,然后采用物理模型进行小区域试验,并同数值计算结果进行对比分析得到所需参数,达到节约研究成本的目的,并为同类工程研究提供部分借鉴。

In order to study the river regime variation under different flood frequencies and its influence on Beiruhe River inverted siphon project after its completion on Middle Router Project of S-N Water Diversion,according to the characteristics that when large flood occurs,the rivers of Beiruhe,Shihe,Xiaoloubei and Ershilipu are jointed up,mathematical model and physical model are applied jointly.The lateral flow boundary and parameters of small area are obtained by numerical calculation of flow movement in large area,and the flows in small areas are researched by model experiment,and the required parameters are obtained by comparison of model and numerical analysis results,which saves the cost and provides some reference for the research of similar projects.