The goal of this work is to establish a design for a cold spray nozzle that produces a flatter spray pattern. To that end, experiments and CFD calculations are carried out to investigate the influence of nozzle geometry and expansion ratio on the behavior of copper particles and gas flows during high-pressure cold spraying. It is found that there is an optimal ratio for the lengths of the diverging and parallel sections in a rectangular nozzle in regard to particle velocity and deposition efficiency. The results are also compared with circular nozzle designs.

computational fluid dynamics, copper particles, high-pressure cold spraying, nozzle expansion ratio, particle velocity, rectangular spray nozzles
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2016
DVS Media GmbH
Topics
Thermal spray equipment Particle analysis Cold spray coating Computational fluid dynamics Copper
Issue Section:
Poster Session: Cold Spray
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