空气幕对抑制收费亭内污染物侵入作用的数值模拟

Numerical Simulation on the Effect of Air Curtain Inhibiting Pollutant Invasion in Toll Booth

针对高速公路收费亭内空气质量差、污染严重的问题,为改善收费亭内工作环境、保障作业人员的身体健康,采用空气幕隔断方式抑制污染物进入亭内。运用Airpak软件对空气幕不同送风速度和送风角度下的抑制效果进行数值模拟,计算结果表明:空气幕可以有效抑制污染物侵入收费亭内;竖直向下送风时,随着送风速度的增加,抑制效果有所增加,当送风速度达到2.0 m/s时,继续增大送风速度对抑制效果的提升不明显;送风角度为0°、5°、10°时,空气幕能起到较好的抑制作用,当送风角度增大至15°、30°时,抑制效果有所降低。

In view of the serious problems of poor air quality and pollution in highway toll booths,in order to improve the working environment and ensure the health of workers,air curtain separation was used to restrain pollutants from entering the toll booth.Using Airpak software,numerical simulation was carried out on the suppression effect of air curtain under different air supply velocities and air supply angles.The results showed that the air curtain played a role in improving the air quality in the toll booth.In the case of vertical downward air supply,the inhibiting effect increased with the increase of air supply velocity.When the air supply velocity reached 2.0 m/s,the increasing of air supply velocity had no obvious effect on inhibiting effect.When the air supply angle was 0°,5°or 10°,the air curtain had a better inhibitory effect.When the air supply angle increased to 15°or 30°,the inhibiting effect decreased.