排放角度对平面负浮力射流的影响及射流远区特性分析  

Influence of injection anlges on planar negatively buoyant jets and characteristic analysis of far-field flow

作　　者：杨中华[1] 槐文信[1] 王驰 余新明[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [2]长江水利委员会长江中游水文水资源勘测局,湖北武汉430012

出　　处：《武汉大学学报（工学版）》2005年第1期34-38,共5页Engineering Journal of Wuhan University

基　　金：国家自然科学基金项目资助(50279037).

摘　　要：采用κ-ε湍流模型和混合有限分析算法,对静止环境中多排放角度的平面负浮力射流进行了数值模拟,分析了射流角度和出口密度弗汝德数对负浮力射流特征量的影响,给出了考虑排放角度的最大上升高度计算公式.分析了垂直射流的远区特性,高密度流体以异重流形式向下游流动.The κ-ε turbulent model is used to obtain a mathematical model of turbulent, planar dense jets. The hybrid finite analytic method and a stagger grid are used to calculate the whole field of this flow pattern. A new equation is given to predict the maximum penetration of planar dense jets with different injection angles and initial densimetric Froude number .Calculation of the far-field behavior indicated that the denseness flow is the main form of the far-field flow. The shape of the denseness flow head and velocity distribution on section are analyzed.

关 键 词：平面负浮力射流 最大上升高度 远区特性 异重流 

分 类 号：O358[理学—流体力学]