6.0 Conclusions

In this paper, a methodology for increasing powder deposition efficiency in corona applications has been presented. The methodology demonstrated an approach to nozzle design with a view of reducing over spray. A computational fluid dynamic code, Fluent, was used to simulate inlet pressure into gun nozzle from the venturi pipe. The CFD simulation offered an opportunity to investigate wide range of nozzle parameters with a view of finding an optimal candidate nozzle design for the powder application process. Experimental results of the candidate gun-nozzle indicated that powder deposition efficiency improved significantly.