The Stabilization of CGL Air Knives through the use of Auxiliary Jets
(Room 310)
06 May 19
11:30 AM
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12:00 PM
Air knives impinging on a moving substrate generate high intensity tonal noise and exhibit large amplitude oscillations that negatively affect the gas jet wiping process. The use of auxiliary slot jets in conjunction with the traditional single slot technology were shown to have the ability to reduce the maximum acoustic amplitude of the air knife by 85% while increasing the pressure gradient at the substrate by 45% and decrease in the pressure fluctuations by 75%. This paper will discuss the mechanisms responsible for the reduction in unstable jet behavior and outline the benefits of adopting this technology in CGL air-knives.