摘要
采用计算流体力学方法,对个人空气净化器的净化效果进行数值模拟。主要讨论办公房间在不开窗和开窗两种情况下,净化器面速对人体呼吸区1μm、2.5μm和10μm粒子浓度分布的影响。结果表明,在净化器面速一定的情况下,人体周围热羽流的强弱是影响净化效果的主要因素。综合两种情况的浓度分布特征,可以发现虽然面速为0.2 m/s时净化器自身的净化效率最低,但达到稳态时整个房间的净化效果最好;当面速为0.05m/s时,净化器的存在弊大于利,反而使得人体周围10ìm粒子浓度升高。
A simulation on the cleaning effect of personal air purifier was conducted by using a computational fluid dynam- ics （CFD） program. Particle concentration distribution influenced by the surface velocity of purifier was illustrated con- ceming two different cases （the window was open or not）, and three typical size of particle are considered for both case. The results show that thermal plume around the human body is the primary factor influencing the cleaning effect; the purifier operating at a surface velocity 0.2 m/s has the highest cleaning effect although its removal efficiency is very low; the purifier operating at 0.05 m/s will make the larger particles （d=10 μm） suspending around the human body.
出处
《洁净与空调技术》
2009年第4期1-5,共5页
Contamination Control & Air-Conditioning Technology
关键词
个人净化器
面速
粒子浓度
Personal air purifier
Surface velocity
Particle concentration
