| 微通道气液柱塞流尾部流场三维实验研究 |
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| 引用本文： | 王凌,罗锐,王补宣.微通道气液柱塞流尾部流场三维实验研究[J].武汉理工大学学报,2011(11):126-130. |
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| 作者姓名： | 王凌 罗锐 王补宣 |
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| 作者单位： | 清华大学热能工程系相变与界面传递现象实验室; |
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| 基金项目： | 国家自然科学基金(50736002) |
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| 摘 要： | 为研究微通道气液柱塞流尾部流场规律,采用三维Micro-PIV可视化技术对微通道气液柱塞流进行实验研究。通过对实验图像处理,绘制出微通道柱塞流气泡尾部区域的三维速度分布图。证实在气泡尾部附近区域的流场具有较大速度,气泡顶端存在滞止点。在气泡尾部区域存在两个对称的方向相反的环流区,增加了微流道在径向上的质量和动量混合。远离气柱尾部的区域,流场为层流,与单相流有类似的抛物线速度分布,即流道中心区域速度大,两边小。在气液界面和壁面之间的流体,运动较复杂,有可能流向气液界面,也有可能流向壁面或者回流。
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| 关 键 词： | 微通道 柱塞流 三维流场 Micro-PIV |
Experimental Investigations on Three-dimensional Flow Field Around the Tail of Gas-liquid Slug Flow in Microchannels |
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| WANG Ling,LUO Rui,WANG Bu-xuan.Experimental Investigations on Three-dimensional Flow Field Around the Tail of Gas-liquid Slug Flow in Microchannels[J].Journal of Wuhan University of Technology,2011(11):126-130. |
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| Authors: | WANG Ling LUO Rui WANG Bu-xuan |
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| Affiliation: | WANG Ling,LUO Rui,WANG Bu-xuan (The Lab of Phase Change and Interfacial Transport Phenomena,Department of Thermal Engineering,Tsinghua University,Beijing 100084,China) |
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| Abstract: | A Three-dimensional Micro-PIV experimental and measuring system was used for studying three-dimensional flow field properties of slug flow in microchannels.Through processing images,three-dimensional velocity flow field of the liquid around the tail of slug bubble was obtained.There was a liquid flow circulation but with an opposite turning direction near the tail of the bubble.In the flow field far away from bubble,a more uniform distribution of liquid velocity in the micro-channel cross section was establ... |
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| Keywords: | microchannel slug flow 3-D flow field Micro-PIV |
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