文档介绍：中周工程热物理学会学术会议论文中和颗粒可压缩性颗粒层模型燃烧学编号:064167 ·龙正伟姚强。黄斌宋蔷清华大学热科学与动力工程教育部重点实验室,北京,100084 Tel:;:******@. 摘要本文针对可压缩颗粒层建立了二维数值模型。首先利用颗粒层中颗粒间的相互位置关系,建立了每一个颗粒的力平衡方程,获得了每一个颗粒的受力大小,然后提出了颗粒层坍塌判据,在此基础上,建立了描述颗粒层的沉积—压缩—沉积的动态过程的可压缩颗粒层模型,此模型计算结果表明, 颗粒层压缩现象主要发生在下部区域,在低过滤速度下的压降随颗粒沉积基本呈线性增长,而高过滤速度下压降出现了不规律跳跃,模型结果符合已知的实验结果。关键词:过滤;颗粒层;压缩;坍塌 Modeling on theFormation pactible Cake Long Z-W YaoQiang Huang Bin SongQiang (KeyLaboratoryfor Thermal Science andPower Engineering ofMinistry Un如ersi桫l Beqing )’ Abstract Inthiswork,a two dimension simulation model on thefiltrationof paetible cake study considered thecollapse of thecake carefully,which was not paid enough attentionin theprevious theforcesequilibrium equations,the forcesacting on every particle are calculated. Then acollapse criterion ,this study developed adetailed model todescribe the collapse process resultsshow thatthecollapses mainly occur inthelower layersof under low filtrationvelocity,the pressure drop tends toincrease linearly,while highvelocity thepressure drop results have good agreement withknown experimental Key words dustcake;press;collapse 1前言布袋作为最有效的烟气除尘装置,其过滤过程可以分为三个时期,分别称为清洁滤收稿日期:2006- 基金项目:困家章点基础研究发展规划项目() 作者简介:龙正伟(1982.),男,lJq)rl省达县,博上,