【作者】 陈光； 戴新； 王东伟；

【Author】 Chen Guang Dai Xin Wang Dongwei (Anhui University of Technology ,Ma’anshan 243002 Anhui China)

【机构】 安徽工业大学；

【摘要】 利用商业软件FLUENT对置换通风地面非浮力颗粒污染源的扩散进行数值模拟,讨论了污染物受送风的影响在室内的分布随时间的变化情况,以及室内不同位置和不同条件下污染物浓度的分布情况。结果表明:室内污染物浓度随时间先增大后减小,分布在送风20min后达到稳定,此时浓度最小;污染物浓度随着送风速度的增大而增大,风速较小时,分布较为均匀,不同高度污染物浓度的最大值为0.0050mg/m3;地面冷污染源在室内扩散的浓度随粒径的减小而增大,模拟的几种粒径中,1μm的扩散浓度最大。更多还原

【Abstract】 The particles source diffusion on the floor was simulated numerically by FLUENT software in displacement ventilation condition. The profile of the particles concentration was discussed in different position, different time and different diameter. The results show the concentration increased early and decreased later. The concentration became stable 20 minute after and arrived at the smallest. The powder concentration increased with the ventilation velocity. It became uniform under lower velocity and its max. of concentration is 0.005mg/m3. The concentration increased with decreasing of the powder diameter.更多还原