关键词: 粒子图像测试技术/
折射率匹配/
流场测量/
多孔介质
English Abstract
Measurement of single phase flow in porous media using PIV technique
Jia Yu-Peng1,2,Wang Jing-Fu3,
Zheng Kun-Can1,2,
Zhang Bing1,
Pan Gang1,
Gong Zhi-Jun1,
Wu Wen-Fei1,2
1.Institute of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China;
2.Inner Mongolia Key Laboratory for Utilization of Bayan Obo Multi-Metallic Resources: Elected State Key Laboratory, Inner Mongolia University of Science and Technology, Baotou 014010, China;
3.College of Environment and Energy Engineering, Beijing University of Technology, Beijing 100124, China
Fund Project:Project supported by the National Basic Research Program of China (Grant No. 2012CB720402), the National Natural Science Foundation of China (Grant No. 51166010), the Innovation Project of Inner Mongolia University of Science and Technology, China (Grant No. 2011NCL001), the Application Technology Research and Development Funds Plan in Inner Mongolia, China (Grant No. 20130310), and the Inner Mongolia University Innovation Team Research Plan, China (Grant No. NMGIRT1406).Received Date:08 October 2015
Accepted Date:09 March 2016
Published Online:05 May 2016
Abstract:Porous media are widely used in the production and living, and also in science and technology. With the development of energy, chemical industry, metallurgy, atomic energy and also with the progress of the modern industrial and agricultural production technology, a large number of heat and mass transfer problems in porous media gradually appear. Further promoting the development of the discipline about the formation and development of porous media becomes one of hot research points in the modern science and technology. It is expected that the accurate experimental picture and data can be obtained through the experiment, and the fluid flow picture and experimental data are analyzed in depth by using the corresponding software, so that the reliable data are obtained and the theory is supported intuitively, making the research of porous media more perfect. The experiment combined with particle image velocimetry technology and refractive index matching technique is conducted to test the transformation process of liquid flow in a random ball porous medium filled bed, and to extract the data. The extracted data are processed by using Tecplot software, and the transformation process of liquid flow mechanism is obtained. Experimental solid phase is a 25 mm-diameter crystal glass ball stacked bed, and liquid phase is the matching liquid prepared with the mixture of the 65% benzyl alcohol and 35% anhydrous ethanol. The refractive indexes of liquid phase and solid phase are both 1.477, which can successfully eliminate the laser light bending caused by the nismaching of refractive indexes. The flow field diagram in the pebble bed with Reynolds number Re in a range 4.7 Re 1000 is obtained experimentally. The comparisons of variations of flow field and flow lines among the different Reynolds numbers reveal that with the increase of Reynolds number, flow lines become more and more disorder: When the Reynolds number Rep exceeds 220, stable swirl flow inside the bed changes suddenly, and manifests a random feature in location and configuration, which forebodes its entrance into stable turbulence phase.
Keywords: particle image velocimetry/
the refractive index matching/
flow field measurement/
porous media
