| 电场中汽泡行为的变化及对沸腾换热的影响 |
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| 引用本文： | 董智广,郁鸿凌,董伟,李瑞阳. 电场中汽泡行为的变化及对沸腾换热的影响[J]. 化工学报, 2009, 60(1): 15-20 |
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| 作者姓名： | 董智广 郁鸿凌 董伟 李瑞阳 |
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| 作者单位： | 上海理工大学动力工程学院,上海,200093;上海理工大学动力工程学院,上海,200093;上海理工大学动力工程学院,上海,200093;上海理工大学动力工程学院,上海,200093 |
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| 基金项目： | 上海市青年科技启明星项目(06QA14035);;上海市教育委员会科研创新项目(08YZ92) |
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| 摘 要： | 为进一步探索电场强化沸腾换热的机理,利用高速摄像仪对沸腾汽泡在电场作用下的生长过程进行了可视化实验研究,实验观察到电场作用下汽泡生长的动态图像,并对电场作用下汽泡行为的改变对沸腾换热的影响进行了初步分析。研究结果表明：电场作用下汽泡沿场强方向伸长,随着场强的升高,汽泡的脱离长径比增大,脱离体积减小,脱离频率增大。汽泡变形是由于汽泡受到电应力的作用,电应力在赤道方向压缩汽泡,在极轴方向拉伸汽泡,使得汽泡沿场强方向变细变长。由于在电场作用下汽泡行为的变化使得沸腾传热系数和临界热流密度提高。
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| 关 键 词： | 电水动力学 汽泡 电应力 沸腾换热 |
| 收稿时间： | 2008-07-07 |
| 修稿时间： | 2008-10-23 |
Change of bubble behavior in electric field and its effects on boiling heat transfer |
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| DONG Zhiguang,YU Hongling,DONG Wei,LI Ruiyang. Change of bubble behavior in electric field and its effects on boiling heat transfer[J]. Journal of Chemical Industry and Engineering(China), 2009, 60(1): 15-20 |
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| Authors: | DONG Zhiguang YU Hongling DONG Wei LI Ruiyang |
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| Affiliation: | School of Power Engineering;University of Shanghai for Science and Technology;Shanghai 200093;China |
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| Abstract: | In order to make further study on the electrohydrodynamic enhancement mechanisms of boiling heat transfer,the growth process of boiling bubbles in the electric field was visually investigated with a high-speed camera.The bubble dynamic growth process was observed in the electric field and boiling heat transfer action influenced by the change of bubble behaviour in the electric field was analyzed.Experimental results showed that the bubble elongated along the direction of the electric field.The bubble's aspe... |
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| Keywords: | electrohydrodynamic bubble electric stress boiling heat transfer |
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