颗粒帘换热器中气粒两相流动特性实验  

Experimental investigation on gas-particle two-phase flow characteristics in particle curtain heat exchanger

作　　者：陈冬林[1] 李恒[1] 程松青 吴秀珍 文聪[1] 熊颖[1] 叶托[1] 

机构地区：[1]长沙理工大学能源与动力工程学院,湖南长沙410114 [2]株洲新时代环保科技有限公司,湖南株洲412007

出　　处：《热力发电》2016年第11期61-67,共7页Thermal Power Generation

基　　金：湖南省科技计划项目(2013KG3193);湖南省教育厅科学研究基金重点资助项目(10A004)

摘　　要：在颗粒帘换热器实验平台上,运用实验测量和理论分析等方法,开展了颗粒帘换热器中气粒两相流动特性的冷态实验。结果表明:当颗粒空隙率较低时,颗粒流卷吸周围空气量减小,换热器通道内下落颗粒帘出现扩散现象,反之,颗粒帘出现收敛现象;颗粒帘后部气流速度随进气速度及颗粒帘初始厚度的增加而增大,随颗粒粒径及颗粒质量流量的增加而减小;进气速度、颗粒质量流量对颗粒帘后部气流速度的影响大于颗粒帘初始厚度、颗粒粒径的影响;颗粒帘后部气流速度随颗粒帘下落高度的增加而增大。The cold test of gas-particle two-phase flow characteristics in a particle curtain heat exchanger was investigated on the experimental platform using the methods of experimental measurement and theoretical analysis. The experimental results show that, a low voidage curtain led to diverging curtain, while increasing the particle voidage caused the curtain to become increasingly convergent. The gas velocity at downstream of the particle curtain increased with the gas velocity and thickness of the particle curtain, while decreased with the increasing mass flow and the particle diameter. The effect of gas velocity and mass flow of the particle on the downstream gas velocity was greater than that of the particle curtain thickness and particle diameter. The downstream gas velocity increased with the curtain drop height.

关 键 词：硅砂 颗粒帘 换热器 两相流动 进气速度 初始厚度 颗粒粒径 质量流量 

分 类 号：TK172[动力工程及工程热物理—热能工程]