基于DPM法单纤维捕集效率的CFD模拟  

Simulation of Collection Efficiency on Single Fiber Surface based on DPM

作　　者：王亮[1] 付海明[1] 朱辉[1] 史晓方[1] 

机构地区：[1]东华大学环境科学与工程学院

出　　处：《建筑热能通风空调》2015年第1期49-51,48,共4页Building Energy & Environment

基　　金：国家自然科学基金(No.51178094)

摘　　要：对单纤维稳态过滤捕集效率采用拉格朗日离散相模型即DPM模型进行模拟分析,所选研究对象为粒径较大颗粒,这意味着主要考虑粒子的惯性机理。由于CFD模拟中粒子总是以点粒子的形式出现,因而忽略了拦截机理,通过DPM模型采用Laminar流场来对流场和迹线进行模拟,直观显示粉尘颗粒运动的轨迹及纤维对粒子的捕集行为,分析了在相同填充率SVF的情况下纤维直径、过滤风速和粒子直径对捕集效率的影响。研究结果表明:单纤维稳态过滤捕集效率随过滤风速、粒子直径的增大而增大,随纤维直径的增大而减小。The collection efficiency on a single fiber in steady condition was mainly discussed with discrete phase model simulation data for analysis and using Laminar flow field to characterize the airflow around the surface of single fibers so that the trajectory of particles could be calculated, these were bigger particles, it was meaning taking into account the inertial collision mechanism, at the same time ignoring particle diffusion collection mechanism. The collection action and the trajectory of particles were directly displayed. The effect of fiber diameter, filtration velocity and particles diameter to collection efficiency of bare single fiber was broke down on same SVF. It was found that this collection efficiency increased with filtration velocity, particles diameter increasing and fiber diameter decreasing.

关 键 词：单纤维 离散相模型 捕集效率 CFD模拟 空气过滤 稳态过滤 

分 类 号：X513[环境科学与工程—环境工程]