Optimal design of a convergent-barrel cold spray nozzle by numerical method |
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| Authors: | Wen-Ya Li Hanlin Liao Chang-Jiu Li C Coddet |
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| Institution: | a LERMPS-Université de Technologie de Belfort-Montbéliard, Site de Sévenans, 90010 Belfort Cedex, France
b State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, PR China |
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| Abstract: | A convergent-barrel (CB) cold spray nozzle was designed through numerical simulation. It was found that the main factors influencing significantly particle velocity and temperature include the length and diameter of the barrel section, the nature of the accelerating gas and its pressure and temperature, and the particle size. Particles can achieve a relatively low velocity but a high temperature under the same gas pressure using a CB nozzle compared to a convergent-divergent (CD) nozzle. The experiment results with Cu powder using the designed CB nozzle confirmed that particle deposition can be realized under a lower gas pressure with a CB nozzle. |
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| Keywords: | Cold spraying Numerical simulation Optimal design Convergent-barrel nozzle Copper coating |
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