垂直换热管道中加速区气固两相流动特性的研究  

Research on Gas-solid Two-phase Flowing Characteristics of Accelerating Zone in a Vertical Heat Exchanger Pipeline

作　　者：张红波 嵇鹰[2] 刘文欢[2] 刘辉[3] 

机构地区：[1]陕西尧柏特种水泥有限公司,陕西西安710075 [2]西安建筑科技大学,陕西西安710055 [3]成都建筑材料工业设计研究院有限公司,四川成都610021

出　　处：《锅炉技术》2008年第6期22-26,共5页Boiler Technology

摘　　要：对垂直换热管道内固粒群进行受力分析,建立固粒群的运动方程,对运动方程进行无量纲分析,得到固粒群的运动解析关系。通过两种不同计算,得到气固速度比与固粒群的加速区的运动时间和距离的关系。固粒群最终运动速度与初始气固速度比无关,取决于固粒群与管壁摩擦条件和悬浮运动速度。固粒群初始速度决定其在加速段作变加速还是作变减速运动。The particles groups in a vertical heat exchanger pipeline was analyzed in stress, the movement equation of particles groups was established to analyze dimensionless equation and gain analytic relation . Though adopting two different calculation , the relation of initial gas and particle velocity ratio and movement time and kinematic range in accelerating zone was gained. The particles velocity in stable state depends on the friction condition and the suspend velocity and is independent on the initial gas and particle velocity. The accelerating or decelerating motion in particles is up to initial particles velocity

关 键 词：气固速度比 加速区 初始速度 悬浮速度 

分 类 号：TK224.1[动力工程及工程热物理—动力机械及工程]