论文标题
人类通道的污染物通过空气窗帘分隔了走廊的两个部分：第二部分 - 在不同温度下的两个区域
Contaminant transport by human passage through an air curtain separating two sections of a corridor: Part II -- two zones at different temperatures
论文作者
论文摘要
空气窗帘安装在建筑物的开放式门口，以减少浮力驱动的交换流。尽管空气窗帘允许人类和车辆的通行不受限制，但这种交通与气幕的相互作用尚不清楚。我们通过使用淡水和盐水解决方案进行小规模的水浴实验来研究这个问题。作为人类通道的模型，将垂直圆柱穿过代表空气窗帘的平面射流，并在不同的密度下分离两个区域。对于气幕前后圆柱体的固定行程距离，光流体侧中致密流体的平均浸润通量会随着气缸速度的增加而增加。但是，我们发现渗透通量独立于整个门口的密度差和圆柱体的行进方向。结果，空气幕的密封效率随着圆柱速度的增加而降低，并且这种还原与浮力驱动流动的方向无关。气幕和气缸唤醒的染料可视化用于检查气缸破坏后空气幕的重建过程。我们观察到，随着气缸速度的增加，气幕的重建时间和圆柱唤醒中的浸润增加。
Air curtains are installed in open doorways of a building to reduce buoyancy-driven exchange flows across the doorway. Although an air curtain allows an unhampered passage of humans and vehicles, the interaction of this traffic with an air curtain is not well understood. We study this problem by conducting small-scale waterbath experiments with fresh water and salt water solutions. As a model of human passage, a vertical cylinder is pulled through a planar jet representing an air curtain and separating two zones at different densities. For a fixed travel distance of the cylinder before and after the air curtain, the average infiltration flux of dense fluid in light fluid side increases with increasing cylinder velocity. However, we find that the infiltration flux is independent of density difference across the doorway and the travel direction of the cylinder. As a consequence, the sealing effectiveness of an air curtain reduces with an increasing cylinder speed and this reduction is independent of the direction of the buoyancy-driven flow. Dye visualisations of the air curtain and the cylinder wake are used to examine the re-establishment process of the air curtain after its disruption by the cylinder. We observe that the re-establishment time of the air curtain and the infiltration in the cylinder wake increases with an increasing cylinder speed.
