摘要
研究在展向磁场作用下,液态金属GaInSn膜流在有机玻璃方腔多层通道中的流动特性。实验首次采用3台激光轮廓测量仪同时捕捉3个位置的液膜表面2D轮廓变化,实现液膜厚度测量。研究结果表明:在有机玻璃通道内,液膜表面波动随流动雷诺数的增大而明显增加;引入的展向磁场有效地抑制沿磁场方向的表面波动,而对沿流向的波动影响较小。在液膜平均厚度变化方面,随磁场的增强,液膜厚度在较小雷诺数时减小,在中等雷诺数时先减小后增大,在大雷诺数时单调增大。同时,磁场对流动的阻碍作用在大雷诺数下表现得较为明显。相比单层膜流实验结果,多层膜流装置有效地改善膜流铺展性,更易实现在表面的大面积铺展。
In this work, the flow characteristics of the liquid GaInSn film in the multilayer channel in the organic glass cavity under the spanwise magnetic field are studied. Three laser level instruments are used to simultaneously capture the liquid 2 D contour changes at three positions, and measure the thickness of film. The experimental results show that the surface fluctuation of the liquid film increases obviously with Reynolds number in the organic glass channel. The magnetic field effectively inhibits the surface fluctuation along the magnetic lines, but has little influence on the surface fluctuation along the streamwise direction. The thickness of the film decreases with the increase of the magnetic field at small Reynolds numbers, the thickness decreases first and then increases at the medium Reynolds numbers, and the thickness of film increases monotonically when Reynolds numbers are large. The larger Reynolds number is, the more obvious the effect of magnetic field’s obstruction of the flow is. The results illustrate that the multilayer film flow device effectively improves the spreading of film flow and makes the spreading easier.
作者
齐天煜
阳倦成
倪明玖
QI Tianyu;YANG Juancheng;NI Mingjiu(College of Engineering Science,University of Chinese Academy of Sciences,Beijing 100049,China;State Key Laboratory for Strength and Vibration of Mechanical Structures,School of Aerospace Engineering,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《中国科学院大学学报(中英文)》
CSCD
北大核心
2019年第3期320-325,共6页
Journal of University of Chinese Academy of Sciences
基金
国家自然科学基金(51406193
51636009)
科技部项目(2013GB114000)资助
关键词
磁场
液态金属
液膜流动
多层通道
magnetic field
liquid metal
film flow
multilayer channel