Optical breakdown model of atomized water droplet induced by laser

被引：0
|
作者：
Sheng D.-R. [1 ]
Su Y.-P. [1 ]
Shi X.-K. [1 ]
Chen J.-H. [1 ]
Li W. [1 ]
机构：
[1] Institute of Thermal Science and Power System, Zhejiang University, Hangzhou
来源：
Zhejiang Daxue Xuebao (Gongxue Ban) | / 5卷 / 949-954期
关键词：
Breakdown position; Breakdown threshold; Laser breakdown of atomized water droplets;
D O I：
10.3785/j.issn.1008-973X.2016.05.019
中图分类号：
学科分类号：
摘要：
The optical breakdown model of water droplet induced by laser was established to analyze the breakdown threshold characteristic of atomized water drop in gas-liquid two phase laser propulsion. Some influence factors of laser breakdown process, such as laser density, radius of water drop and wavelength of laser, were discussed. Results show that with the increase of incident power density from 107 W/cm2 to 1011 W/cm2 the breakdown position moves along the opposite direction of the incident laser. The breakdown threshold decreases from 35×106 W/cm2 to 2.5×106 W/cm2 and the breakdown position moves along the direction of the incident laser with the improvement of the radius of water droplets fromo 0 to 50 μm. The breakdown position moves along the opposite direction of the incident laser with the increase of the laser wavelength fromo 0 to 12 μm. The breakdown threshold rapidly decreases from 2.5×107 W/cm2 to 5×106 W/cm2 with the increase of laser wavelength when the wavelength is short (λ<2 μm), while the breakdown threshold has a little variation when the wavelength is long (λ>2μm). © 2016, Zhejiang University Press. All right reserved.
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页码：949 / 954
页数：5
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