In this paper, we established a two-dimensional spatial axisymmetric finite element model to simulate the laser-supported absorption wave(LSAW) induced millisecond pulsed laser on aluminum alloy, obtained the relationship among velocity of LSAW, laser energy density and pulse width. And the finite element analysis software, COMSOL Multiphysics, was utilazed in the research. we simulated the generation and propagation procedure of LSAW based on hydrodynamic theory. All the important physical process were considered in the model which were inverse bremsstrahlung, thermal radiation, heat conduction and thermal convection. We simulated aluminum alloy irradiated by long pulse laser with different energy densities and pulse widths, the results showed that the time when the velocity reached maximum was increased with the growth of laser energy density, after laser irradiation, the velocity of LASW decreased immediately to zero, and the velocity of LSAW become slower by increasing the pulse width while the laser energy density was unchanged, moreover, the velocity of LSAW increased by increasing the laser energy density while the pulse width was unchanged. The results of the study can be applied in the laser propulsion and laser enhancement technology, etc.

Date Published: 29 March 2019
PDF: 6 pages
Proc. SPIE 11046, Fifth International Symposium on Laser Interaction with Matter, 1104630 (29 March 2019); doi: 10.1117/12.2523899

Published in SPIE Proceedings Vol. 11046:
Fifth International Symposium on Laser Interaction with Matter
YiJun Zhao, Editor(s)