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横掠液柱流的微粒运动机理及PM2.5捕获(Ⅰ)附面运动轨迹与分离半径

横掠液柱流的微粒运动机理及PM2.5捕获(Ⅰ)

附面运动轨迹与分离半径

陈治良1魏文韫1朱家骅1郭沈2夏素兰1余徽1

1四川大学化工学院,四川成都6100652沈阳铝镁设计研究院,辽宁沈阳110001

摘要:提出了横掠液柱流的速度场和温度场推动PM2.5微粒附面运动机理,建立了微粒附面运动微分方程和数值积分反演方法,计算粒子运动轨迹并预测可吸收的微粒运动最大分离半径。定义最大分离半径与液柱表面之间附面层的厚度为分离厚度,以气溶胶流体通过该区域的体积流量与横掠单液柱的总体积流量之比代表单液柱吸收效率;热泳推动力是强化吸收效率的主要因素。基于单液柱吸收效率,按串联模型导出规则排列的液柱群整体分离效率计算公式,依据液柱交叉流几何结构、流体流动和气液两相传热传质参数即可确定整体分离效率。

对交叉流Reynolds数为170的实例计算显示,直径4 mm的单液柱吸收效率为1.18%,由195排液柱群组成的长度为1170 mm的分离通道整体分离效率达到90%。

PM2.5吸收;液柱交叉流;热泳;气液界面;附面层

10. 3969/j. issn. 0438-1157.2012.07.002

X51A0438-1157 (2012) 07-2001-09

Mechanism of micro-particle motion across falling liquid cylinder for PM2.5 separation ( Ⅰ ) Trajectory of particle motion towards 

surface and separation radius 

CHEN ZhiliangWEI WenyunZHU Jiahua GUO ShenXIA Sulan YU Hui

2012-01-092012- 02-14

陈治良(1965—),男,博士研

究生,工程师。

国家自然科学基金项目(20806048);中央高校基

本科研专项(2010SCU22008).

,近十年影q

)M2.5粒子附面

力学研究者右

争微粒进人

传质通量自 m n一^

(23

乎均气流速度:(△r)吒对应削驻曲谛洼确,,.

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横掠液柱流的微粒运动机理及PM2.5捕获(Ⅰ)附面运动轨迹与

分离半径

作者:陈治良, 魏文韫, 朱家骅, 郭沈, 夏素兰, 余徽, CHEN Zhiliang, WEI Wenyun,ZHU Jiahua, GUO Shen, XIA Sulan, YU Hui

作者单位:陈治良,魏文韫,朱家骅,夏素兰,余徽,CHEN Zhiliang,WEI Wenyun,ZHU Jiahua,XIA

Sulan,YU Hui(四川大学化工学院,四川成都,610065), 郭沈,GUO Shen(沈阳铝镁设计研究

院,辽宁沈阳,110001)

刊名:

化工学报

英文刊名:CIESC Journa

年,卷(期):2012,63(7)

参考文献(18条)

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2.殷永文;程金平;段玉森Economic evaluation of residents' health hazard caused by PM2.5 of haze pollution in a city[外文期刊] 2011(03)

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4.李永旺;赵长遂;吴新Aggregation mechanism of PM10 from coal combustion in uniform magnetic field[期刊论文]-化工学报 2007(04)

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1998(05)

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