Computational Simulation of the Effect of Nozzle Export Section Shape on Cold Spraying Technology for Material Modification

The speed of coating growth,the area of effective spraying and the eveness of spraying had important relationship with nozzle export section shape.By the numerical simulation of jet-flow field,comparison of the important feature of different nozzle export section shapes,indicates that nozzle export section with rectangle shape is good for the even coating of big area spraying,and better than that with circle shape.This conclusion coincides well with relative result in laboratory.