| 自然对流情形下激光辐照液体贮箱的机理 |
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| 引用本文： | 焦路光,赵国民,李君神,陈敏孙,杨在富.自然对流情形下激光辐照液体贮箱的机理[J].强激光与粒子束,2015,27(12):121006. |
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| 作者姓名： | 焦路光 赵国民 李君神 陈敏孙 杨在富 |
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| 作者单位： | 1.军事医学科学院 放射与辐射医学研究所, 北京 1 00850; |
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| 摘 要： | 利用激光辐照靶目标时,被辐照部位可能是液体贮箱。通过实验测量与数值模拟的紧密结合,揭示了液体处于自然对流状态时激光辐照下贮箱侧壁温升及液体速度场的演化规律。结果表明:激光辐照初期,铝板中心温升率较高;随着壁面附近液体温度的升高,光斑附近速度边界层内的最大流速增大,传热强度亦增大,导致铝板温升率降低;当铝板吸收的激光能量能够基本被水的对流带走时,铝板中心的温升率趋于零。
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| 关 键 词： | 激光与物质相互作用 液体贮箱 自然对流 粒子图像测速 |
| 收稿时间： | 2015-09-19 |
Natural convection flow in a liquid tank induced by laser irradiation |
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| Affiliation: | 1.Beijing Institute of Radiation Medicine,Academy of Military Medical Sciences,Beijing 100850,China;2.College of Optoelectronic Science and Engineering,National University of Defense Technology,Changsha 410073,China |
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| Abstract: | Liquid tank is a potential part irradiated by laser in laser-matter interaction research. In this paper, laser irradiation effects on a water tank were investigated by experiments and numerical simulations on the condition that the water was in a natural convection state. The irradiation mechanisms are described as follows: at the initial stage of laser irradiation, the center region of the aluminum wall had an obvious temperature increase due to laser heating, and the temperature of the water near the wall also had a slight increase. With the time evolution, the water temperature became larger and higher, and the magnitude of the max velocity on the line, which was perpendicular to the plate and passed through the laser spot center, kept on increasing in response to the temperature increase, thus the heat transfer intensity continued increasing. With the increase of the heat transfer intensity, the temperature rise rate of the aluminum wall decreased gradually. When the energy absorbed by the wall could be taken away by the water natural convection, the temperature rise rate of the plate center approached zero. |
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