Spiral Vortex Flow

Spiral vortex air distribution can be used to localize air contaminants in cer­tain room areas and to evacuate the polluted air from those areas. A spiral vortex in a space can be formed by supplying air through the vertical supply ducts located along a closed contour (preferably along the walls), thus gener­ating a vertical vortex. An exhaust outlet can be located in the ceiling near the center of the rotational flow. Such a combination of air supply and exhaust — systems allows a means for concentrating contaminants in the vortex core and transporting them to the exhaust outlet along the core axis (Fig. 7.13). Low pressure in the vortex core allows for the collection of contaminants and for preventing their diffusion to the clean space.15-16

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