颗粒帘换热器中固体颗粒流动特性实验研究  

Experimental Investigation on Solid Particle Flow Characteristics in Particle Curtain Heat Exchanger

作　　者：陈冬林[1] 李恒[1] 程松青 吴秀珍 

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：《热能动力工程》2017年第2期88-94,共7页Journal of Engineering for Thermal Energy and Power

基　　金：湖南省科技计划项目(No.2013KG3193);湖南省教育厅科学研究基金重点基金资助项目(No.10A004)

摘　　要：提出了一种基于气体-固体颗粒快速热平衡的颗粒帘换热器。为揭示该换热器中气粒两相间的动力学特性,在颗粒帘换热器实验平台上开展了颗粒帘换热器中固体颗粒流动特性的冷态实验。实验结果表明:颗粒帘沿程厚度随进气速度的增加而减小,颗粒帘后沿水平偏移量随进气速度的增加而增大;颗粒帘沿程厚度及颗粒帘后沿水平偏移量随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;颗粒帘沿程厚度和颗粒帘后沿水平偏移量随着颗粒帘下落高度的增加而增大;颗粒帘落点水平偏移量随进气速度的增加而增大,随颗粒帘初始厚度及颗粒粒径及颗粒质量流量的增加而减小。这些结果为颗粒帘换热器结构的优化设计和气固两相流动、换热及积灰特性的研究奠定了良好的基础。A particle curtain heat exchanger based on the rapid heat balance of gas-particle two-phase flow was proposed. To reveal the gas-particle flow dynamics in the particle curtain heat exchanger,solid particle flow characteristics under cold condition was investigated on the experimental platform. The experimental results showed that as gas velocityincreases,the longitudinal thickness of particle curtian decreases,while the horizontal displacement increases. The longitudinal thickness and the horizontal displacemnt of particle curtain increase with the thickness of the particle curtain,while they decrease with mass flow and particle diameter. The trailing edge of horizontal displacement increases with gas velocity,while it decreases with curtain thickness,particle mass flow and particle diameter. These results are believed to lay a good foundation for the design optimization of particle curtain heat exchanger and thestudy of gas-solid two-phase flow and heat characteristics

关 键 词：颗粒帘换热器 固体颗粒 流动特性 实验研究 

分 类 号：TK172[动力工程及工程热物理—热能工程]