Abstract:

Airflow generated by fabric air dispersion system (FADS) in penetration mode was visualized, and the distribution of pressure along the radial and air flow direction inside FADS was quantificationally analyzed.Experimental results show that airflow disperses out from porous fiber, and moves downward in very low speed, and there exists eddies surrounding the diffusion zone.In addition, the static pressure along the radius direction inside FADS reduces with small gradient and the corresponding total pressure seldom changes.Furthermore, the total pressure along the flow direction reduces gradually, and the corresponding static pressure increases with small gradient, the maximum value occurs at the end of FADS.

Key words: 通风, 纤维空气分布系统, 渗透式, 可视化, 速度分布, 压力分布

摘要：

采用干冰对纤维空气分布系统渗透送风时空气流动情况进行了可视化实验，定量分析了纤维空气分布系统内部空气压力沿径向和流动方向的变化情况。实验结果表明：空气充满纤维空气分布系统空腔后，以极低的流速从四周纤维壁面向外扩散，然后向下方流动，扩散四周有明显的涡流产生；沿着半径增加的方向，纤维空气分布系统内部空气静压逐渐减小，幅度缓慢，全压值基本不变；沿着流动方向，空气全压均逐渐减小，静压则逐渐增大，但增幅不大，末端处静压复得现象较为明显。

关键词: 通风, 纤维空气分布系统, 渗透式, 可视化, 速度分布, 压力分布