Hi Hunter85
to the Surface Engineering Forum.
Not been able to find much on this topic. Nearly all publish parameter optimisation work I've come across tends to concentrate on fuel/oxygen flows/ratios, spray distance and spray rates as the variable factors. Air flow for some reason is usually set as a constant from recommended parameters. Air flow is a critical parameter, apart from providing cooling to the air cap, it will influence gas/particle velocity/temperature. It will also influence any tendency for air cap fouling.