| 竖直流动沸腾滑移汽泡速度预测及运动机理 |
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| 引用本文： | 徐建军,陈炳德,王小军.竖直流动沸腾滑移汽泡速度预测及运动机理[J].化学工程,2009,37(2). |
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| 作者姓名： | 徐建军 陈炳德 王小军 |
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| 作者单位： | 中国核动力研究设计院,空泡物理和自然循环国家级重点实验室,四川,成都,610041 |
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| 基金项目： | 空泡物理和自然循环国家级重点实验室资助项目 |
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| 摘 要： | 为了建立合理的机理模型,需要深入了解滑移汽泡的运动特征。文中通过对竖直流动沸腾下近壁滑移汽泡进行受力分析,建立了滑移汽泡动量守恒方程式,获得了近壁滑移汽泡的速度,并与Maity的实验数据进行了比较分析。模型预测结果表明,随着时间的延长,滑移汽泡的速度逐渐增大,但增大的趋势逐渐变缓慢;汽泡浮升时,滑移汽泡速度高于液相入口主流速度,表明该种情况下,曳力和附加质量力由促使汽泡滑移的动力变为阻力;当滑移汽泡速度大于当地液相速度时,剪切升力使得汽泡靠近壁面,而由于汽泡形状变化所产生的流体惯性力可能是汽泡从壁面浮升的动力。
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| 关 键 词： | 滑移汽泡 速度 受力分析 竖直流动沸腾 |
Predicting velocity and motive mechanism of sliding bubble in vertical flow boiling |
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| XU Jian-jun,CHEN Bing-de,WANG Xiao-jun.Predicting velocity and motive mechanism of sliding bubble in vertical flow boiling[J].Chemical Engineering,2009,37(2). |
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| Authors: | XU Jian-jun CHEN Bing-de WANG Xiao-jun |
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| Affiliation: | National Key Laboratory of Bubble Physics & Natural Circulation;Nuclear Power Institute of China;Chengdu 610041;Sichuan Province;China |
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| Abstract: | The motive characteristic of the sliding bubble was studied to constitute the reasonable mechanism models.The dynamic equation of the sliding bubble was established according to the analysis of the balance of forces acting on the sliding bubble in vertical flow boiling.The velocity of the sliding bubble was obtained,and the predicted results were compared with the experimental data of Maity.The predicted results of the model show that the velocity of the sliding bubble increases with extending time,but the ... |
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| Keywords: | sliding bubble velocity force analysis vertical flow boiling |
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