ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Phase transition model of water flow irradiated by high-energy laser in a chamber |
Wei Ji-Feng (魏继锋)a b c d, Sun Li-Qun (孙利群)a, Zhang Kai (张凯)b d, Hu Xiao-Yang (胡晓阳)b d |
a State Key Laboratory of Precision Measurement Technology and Instrument, Tsinghua University, Beijing 100084, China; b Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang 621900, China; c Graduate School of China Academy of Engineering Physics, Beijing 100088, China; d Key Laboratory of Laser Science and Technology, China Academy of Engineering Physics, Mianyang 621900, China |
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Abstract In the absorption chamber of a high-energy laser energy meter, water is directly used as an absorbing medium and the interaction of the high-power laser and the water flow can produce a variety of physical phenomena such as phase transitions. The unit difference method is adopted to deduce the phase transition model for water flow irradiated by a high-energy laser. In addition, the model is simulated and verified through experiments. Among them, the experimental verification uses the photographic method, shooting the distribution and the form of the air mass of water flow in different operating conditions, which are compared with the simulation results. The research shows that it is achievable to reduce the intensity of the phase transition by increasing the water flow, reducing the power intensity of the beam, shortening the distance the beam covers, reducing the initial water temperature or adopting a shorter wavelength laser. The study's results will provide the reference for the design of a water-direct-absorption-type high-energy laser energy meter as well as an analysis of the interaction processes of other similar high-power lasers and water flow.
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Received: 15 August 2013
Revised: 02 January 2014
Accepted manuscript online:
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PACS:
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42.87.-d
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(Optical testing techniques)
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42.62.Eh
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(Metrological applications; optical frequency synthesizers for precision spectroscopy)
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44.35.+c
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(Heat flow in multiphase systems)
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44.90.+c
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(Other topics in heat transfer)
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Corresponding Authors:
Wei Ji-Feng
E-mail: wjfcom2000@163.com
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About author: 42.87.-d; 42.62.Eh; 44.35.+c; 44.90.+c |
Cite this article:
Wei Ji-Feng (魏继锋), Sun Li-Qun (孙利群), Zhang Kai (张凯), Hu Xiao-Yang (胡晓阳) Phase transition model of water flow irradiated by high-energy laser in a chamber 2014 Chin. Phys. B 23 074209
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