近岸缓流区河道动能修正系数的研究

动能修正系数值是工程一维数学模型计算中应考虑的主要因素,其通常取值为1,但动能修正系数常规取值对边侧存在近岸缓流区的天然河道并不适用。从动能修正系数的定义出发,对近岸缓流区河道动能修正系数作理论推导,同时结合水槽概化模型试验对公式进行验证。得到了近岸缓流区河道动能修正系数的计算方法和沿程变化的一些规律。相关成果可为工程中涉及近岸缓流区河道一维数学模型计算提供参考。

Research on Kinetic Energy Correction Factor of River Channel with Nearshore Back-flow Zone

Kinetic energy correction factor of one-dimensional mathematical model is a major factor to consider, it usually equals to one. The general kinetic ener-gy correction factor is not suitable for river channel with nearshore back-flow zone. Using the definition of kinetic energy correction factor to study the factorof river channel with nearshore back-flow zone in theory,combined with flume gene-ralized model test as equation check. This paper presents the calculation method of kinetic energy correction factor of river channel with nearshore back-flow zone,and some rules along the way are given as well. The results can be used for refer-ence in a one-dimensional mathematical model calculation involved river channel with nearshore back-flow zone.