摘要
静止环境中的倾斜浮力射流是环境水力学中的基本流态之一。本文给出了一种浮力射流的积分模型,流速和密度差剖面假定为高斯分布,并导出掺入率与当地密度弗劳德数的关系以封闭控制方程。用四阶龙格—库塔法计算这类定解问题。计算结果与试验资料吻合得很好。
An inclined buoyant jet in static environment is one of the basic flow patterns for environmental hydraulics. An integral mathematical model of buoyant jets is given in this paper. The profiles for both velocity and density difference are assumed to be Gaussian distribution. And the relation of the entrainment rate with local densimetric Froude number is derived for closing the governing equations. The method of Runge-Kutta is used tO solve this problem. The calculated results of the inclined buoyant jets are compared with the experimental data and the agreement between them is very good.
关键词
浮力射流
环境水力学
积分法
buoyant jet
integration
environmental hydraulics
