Flow Stabilization Through Use of Multi-Slot Air Knife During Gas-Jet Wiping in Continuous Galvanizing Lines

Current single-slot air knife technology has become limited while presenting challenges to industrial hygiene due to the noise arising from jet flapping. A novel multi-slot design has been proposed to alleviate these concerns, with dynamic modelling of the jet behaviour continuing to be a challenge. LES and POD were used to confirm strong jet flapping for the single slot jet, with five dominant flow modes, while one stable mode was identified for the multi-jet. Thus, a stabilized flow with a significantly longer potential core was realized for the multi-slot jet, leading to lower coating weights versus the conventional technology.

Dr Ali Yahyaee Soufiani | McMaster University
 

Dr Joseph McDermid | McMaster University
 

Dr Andrew Hrymak | Western University
 

Frank Goodwin | International Zinc Association