Migration behavior of bubble cluster emerging from micro-orifice with liquid cross flow in mini-channel

doi:10.3969/j.issn.0438-1157.2014.10.009

CIESC Journal ›› 2014, Vol. 65 ›› Issue (10): 3805-3810.DOI: 10.3969/j.issn.0438-1157.2014.10.009

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Migration behavior of bubble cluster emerging from micro-orifice with liquid cross flow in mini-channel

ZHU Xun^1,2, XIE Jian², WANG Hong^1,2, LIAO Qiang^1,2, DING Yudong^1,2, FENG Hao²

1 Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing 400030, China;
2 Institute of Engineering Thermophysics, Chongqing University, Chongqing 400030, China

Received:2014-03-20 Revised:2014-06-03 Online:2014-10-05 Published:2014-10-05
Supported by:
supported by the National Natural Science Foundation for Outstanding Young Scholar (51325602), the National Natural Science Foundation of China (51276208), the Natural Science Foundation of Chongqing (2012jjjq0003), the Research Fund for the Doctoral Program of Higher Education of China (20120191110010) and the Program for New Century Excellent Talents in University (NCET-12-0591).

微小通道内液体扰流微孔逸出气泡串的迁移行为

朱恂^1,2, 谢建², 王宏^1,2, 廖强^1,2, 丁玉栋^1,2, 冯浩²

1 重庆大学低品位能源利用技术及系统教育部重点实验室, 重庆 400030;
2 重庆大学工程热物理研究所, 重庆 400030

通讯作者: 朱恂
基金资助:
国家杰出青年科学基金项目（51325602）；国家自然科学基金项目（51276208）；重庆市杰出青年基金项目（2012jjjq0003）；高等学校博士学科点专项科研基金项目（20120191110010）；教育部新世纪人才资助计划项目（NCET-12-0591）。

Abstract

Abstract: Visualization experiments were performed on migration behavior of bubble cluster emerging from a micro-orifice with liquid cross flow in a mini rectangular channel. Based on the self-developed image processing method, the influences of liquid flow rate and inclination angle of the channel on the size, velocity and trajectory of bubble cluster were discussed. Meanwhile, micro-bubbles accumulation at the top wall of the channel was observed and analyzed under different operating conditions. The bubbles size as well as the angle between bubble trajectory and channel bottom wall decreased with increasing liquid flow rate and inclination angle of the channel. Furthermore, the location and number of the micro-bubbles accumulated at the top wall were distinctly affected by liquid flow rate and channel inclination angle.

Key words: microchannels, micro-orifice, bubble, gas-liquid flow, micro-bubble accumulation, visualization experiment

摘要： 对微小矩形通道内，液体扰流下微孔孔口逸出气泡串的迁移行为进行了可视化实验。基于图像处理方法，分别研究了液体流量和通道倾斜角度对气泡串尺寸、运动速度以及运动轨迹的影响。发现了不同工况下通道内的微气泡堆积现象，并对其进行了分析。结果表明：增大液体流量或者通道倾角，使得形成的气泡尺寸减小，气泡运动轨迹与通道壁面夹角减小，气泡运动速度增大。液体流量与通道倾角影响了通道内微气泡堆积的位置及数量。

关键词: 微通道, 微孔, 气泡, 气液两相流, 微气泡堆积, 可视化实验

CLC Number:

TK121

ZHU Xun, XIE Jian, WANG Hong, LIAO Qiang, DING Yudong, FENG Hao. Migration behavior of bubble cluster emerging from micro-orifice with liquid cross flow in mini-channel[J]. CIESC Journal, 2014, 65(10): 3805-3810.

朱恂, 谢建, 王宏, 廖强, 丁玉栋, 冯浩. 微小通道内液体扰流微孔逸出气泡串的迁移行为[J]. 化工学报, 2014, 65(10): 3805-3810.

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Migration behavior of bubble cluster emerging from micro-orifice with liquid cross flow in mini-channel

微小通道内液体扰流微孔逸出气泡串的迁移行为

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