Laser-Induced Particle Jet and Its Ignition Application in Premixed Combustible Gases |
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Authors: | YANG Qian-Suo LIU Chun PENG Zhi-Min ZHU Nai-Yi |
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Institution: | Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190 |
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Abstract: | A hot particle jet is induced as a laser pulse from a free oscillated Nd:YAG laser focused on a coal target. The particle jet successfully initiates combustion in a premixed combustible gas consisting of hydrogen, oxygen, and air. The experiment reveals that the ionization of the particle jet is enhanced during the laser pulse. This characteristic is attributed to the electron cascade process and the ionization of the particles or molecules of the target. The initial free electrons, which are ablated from the coal target, are accelerated by the laser pulse through the inverse Bremsstrahlung process and then collide with the neutrals in the jet, causing the latter to be ionized. |
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Keywords: | 52 70 52" target="_blank">Kz')">52 70 Kz 52 50 Jm 52 25 Jm 52" target="_blank">')"> 52 38 Dx |
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