TY - JOUR
T1 - Flow characteristics and micro-scale metallic particle formation in the laser supersonic heating technique
AU - Lin, Shih Lung
AU - Lin, Jehnming
N1 - Funding Information:
This work is supported by the National Science Council under Grant no. NSC 92-2212-E-006-048.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2007/2
Y1 - 2007/2
N2 - The characteristics of the supersonic flow of the laser heating technique for producing micro-scale metallic particles were investigated in this study. A numerical model was established to predict the flow fields and particle trajectories leaving a spray nozzle with shock wave effects. The compressible flow of the shock waves and the trajectories of particles in diameters of 1-20 μm were simulated and compared with the flow visualization. In the experiment, a pulsed Nd-YAG laser was used as heat source on a carbon steel target within the nozzle, and the carbon steel particles were ejected by high-pressure air. The result shows that the shock wave structures were generated at various entrance pressures, and there is a significant increase in the amount of carbon steel particles and the spraying angles by increasing the entrance air pressure.
AB - The characteristics of the supersonic flow of the laser heating technique for producing micro-scale metallic particles were investigated in this study. A numerical model was established to predict the flow fields and particle trajectories leaving a spray nozzle with shock wave effects. The compressible flow of the shock waves and the trajectories of particles in diameters of 1-20 μm were simulated and compared with the flow visualization. In the experiment, a pulsed Nd-YAG laser was used as heat source on a carbon steel target within the nozzle, and the carbon steel particles were ejected by high-pressure air. The result shows that the shock wave structures were generated at various entrance pressures, and there is a significant increase in the amount of carbon steel particles and the spraying angles by increasing the entrance air pressure.
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U2 - 10.1016/j.optlastec.2005.05.006
DO - 10.1016/j.optlastec.2005.05.006
M3 - Article
AN - SCOPUS:33748302037
SN - 0030-3992
VL - 39
SP - 53
EP - 60
JO - Optics and Laser Technology
JF - Optics and Laser Technology
IS - 1
ER -