泡沫陶瓷过滤机理的研究  

A Study on Trapping Mechanism of Ceramic Foam

作　　者：资新运[1] 宁智[2] 吴良勤[3] 贺宇[3] 张春润[3] 

机构地区：[1]清华大学汽车安全与节能国家重点实验室,北京100084 [2]北方交通大学 [3]军事交通学院

出　　处：《内燃机学报》2000年第2期156-160,共5页Transactions of Csice

基　　金：国家自然科学基金! (5 9976 0 0 1 );高等学校重点实验室访问学者基金资助项目

摘　　要：建立了泡沫陶瓷的三维物理模型和气粒两相流模型。该模型着重考虑了泡沫陶瓷对柴油机排气微粒的扩散拦截和惯性碰撞拦截 ,对三维模型中的气粒两相流进行了模拟计算。通过模拟计算 ,分析了气体流速、微粒粒径、泡沫陶瓷微孔参数对微粒扩散拦截和惯性碰撞拦截效率的影响。研究结果有助于理解泡沫陶瓷的过滤机理 。A three-dimensional physical model of ceramic foam and a gas-solid two-phase flow model are estabished,in which diesel particulate diffusion and inertia collision trapping by ceramic foam are concerned.The gas-solid flow in the three-dimensional model is simulated.The diffusion trapping efficiency and inertia collision trapping efficiency are calculated under different gas flowing velocity,particulate size and ceramic foam parameter using the numerical model.The research results can deepen the understanding of trapping mechanism of ceramic foam and provide the scientific basis for designing ceramic foam parameters and particulate trap that uses ceramic foam.

关 键 词：泡沫陶瓷 过滤机理 流速 排气微粒 柴油机 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]