摘要
随着我国室外颗粒物浓度的升高,室外颗粒物透过建筑通风管道系统进入室内已成为室内颗粒物浓度升高的主要原因,对居民身体健康带来严重威胁。针对细小颗粒物在通风管道内的运动进行数值模拟和分析,研究颗粒在湍流输运过程中的粒径分布和质量分布现象以及颗粒在输运过程凝并和沉积效应的综合作用下的颗粒粒径分布和质量分布规律,最后得到不同通风压力下管道内颗粒的粒径分布特性和质量分布特性。由此可通过该分布规律,采取相应手段,对颗粒物进行有效地捕集,从而减少颗粒物向室内的传播。
With the increase of outdoor particle concentration in China, outdoor particles penetrating into the interior of building become the main reason for theconcentration increase of indoor particulates which bring a serious threat to thehealth of residents. In this paper, during the particulatematter （PM） transport process, the different PM size distribution and mass distribution characteristicsbetween the action of the coagulation and sedimentation effects and no those actions are studied and numerically simulated.Finally, the PM size distribution and mass distribution characteristics of the particles in the pipeline are obtained under different ventilation pressures. Therefore, it is possible to reduce the dispersion of PM into the room by analyzing the distributions of the PM and taking appropriate measures to effectively capture the particulate matter.
作者
居剑亮
曹为学
Ju Jianliang Cao Weixue
出处
《洁净与空调技术》
2017年第1期57-61,共5页
Contamination Control & Air-Conditioning Technology
关键词
颗粒物
通风管道
输运过程
分布特性
Particulate matter
Pipeline
Transport process
Distribution characteristics
