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.