直角交汇河段流场特性分析

Experiment study and numerical simulation for hydraulic characteristics of open channel junction at right angle

本文通过对直角交汇河段水力特性的实验研究及数值模拟,系统地分析了交汇段近区的流场特性。发现了交汇段近区流场的相似规律,提出了较完善的交汇近区流场模型。为从本质上分析交汇段近区的水力特性提供了依据。

In this paper, the flow features over the near field of the open channel junction at right angle are investigated systematically by experiment study and numerical simulation. The actual velocity distributions are observed and measured in the hydraulic laboratory. At the same time, a depth -averaged mathematical model with an advanced turbulent K-ε model is applied to calculate the distributions of velocity and turbulent viscosity over the near field. The distributions of turbulent kinetic energy and turbulent dissipation calculated by numerical analysis are given In the paper. Some similarity laws of velocity are obtained. The calculation results agree well with the measured data.