Air amplifiers or cd-style pumps use a Coanda effect to draw in large volumes of ambient air in relation to the small amount of compressed air consumed. Air amplifiers are great for blow-drying, ventilation, and handling highly porous but lightweight parts.
How Air Amplifiers Work
The Coanda principle employs a nozzle that causes high velocity compressed air to cling to its shaped airfoil wall. Ambient air is drawn into the inlet and down into the center of the vortex formed by the Coanda nozzle. Discharge air flow at the exhaust is much greater than the compressed air consumption.