Unsteady motion of laser ablation plume by vortex induced by the expansion of curved shock wave

D. T. Tran; K. Mori

doi:10.1117/12.2270749

20 February 2017 Unsteady motion of laser ablation plume by vortex induced by the expansion of curved shock wave

D. T. Tran, K. Mori

Proceedings Volume 10328, Selected Papers from the 31st International Congress on High-Speed Imaging and Photonics; 103281L (2017) https://doi.org/10.1117/12.2270749
Event: 31st International Congress on High-Speed Imaging and Photonics, 2016, Osaka, Japan

Abstract

There are a number of industrial applications of laser ablation in a gas atmosphere. When an intense pulsed laser beam is irradiated on a solid surface in the gas atmosphere, the surface material is ablated and expands into the atmosphere. At the same time, a spherical shock wave is launched by the ablation jet to induce the unsteady flow around the target surface. The ablated materials, luminously working as tracer, exhibit strange unsteady motions depending on the experimental conditions. By using a high-speed video camera (HPV-X2), unsteady motion ablated materials are visualized at the frame rate more than 10⁶ fps, and qualitatively characterized.

Citation Download Citation

D. T. Tran and K. Mori "Unsteady motion of laser ablation plume by vortex induced by the expansion of curved shock wave", Proc. SPIE 10328, Selected Papers from the 31st International Congress on High-Speed Imaging and Photonics, 103281L (20 February 2017); https://doi.org/10.1117/12.2270749

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