Abstract
Cold spray deposition of micro-particles using a supersonic nozzle is studied using the numerical simulation of the turbulent flow field. A bell-type nozzle geometry is used for injecting the cold particle spray at supersonic velocity. The impact of driver gas pressure, temperature and particle size on critical deposition parameters is studied for transverse and axial injection. The results of the study show that particle velocity at impact is higher for axial injection in comparison to that for transverse injection under similar conditions. The approach of utilizing bell type nozzles for spray deposition is found to be beneficial with regard to the compactness of the system as well as the axial alignment of the spray.
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