Abstract
In an effort to corroborate theoretical and experimental techniques used for cold spray particle velocity analysis, two theoretical and one experimental methods were used to analyze the operation of a nozzle accelerating aluminum particles in nitrogen gas. Two-dimensional (2D) axi-symmetric computations of the flow through the nozzle were performed using the Reynolds averaged Navier-Stokes code in a computational fluid dynamics platform. 1D, isentropic, gas-dynamic equations were solved for the same nozzle geometry and initial conditions. Finally, the velocities of particles exiting a nozzle of the same geometry and operated at the same initial conditions were measured by a dual-slit velocimeter. Exit plume particle velocities as determined by the three methods compared reasonably well, and differences could be attributed to frictional and particle distribution effects.
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Champagne, V.K., Helfritch, D.J., Dinavahi, S.P.G. et al. Theoretical and Experimental Particle Velocity in Cold Spray. J Therm Spray Tech 20, 425–431 (2011). https://doi.org/10.1007/s11666-010-9530-z
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DOI: https://doi.org/10.1007/s11666-010-9530-z