| 层流泡状流运动的数学模型 |
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| 引用本文： | 宋蔷,杨献勇,罗锐,王洲.层流泡状流运动的数学模型[J].清华大学学报(自然科学版),1998(5). |
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| 作者姓名： | 宋蔷 杨献勇 罗锐 王洲 |
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| 作者单位： | 清华大学热能工程系 |
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| 摘 要： | 研究在绝热条件下层流泡状流在垂直管段中充分发展段的运动情况。在对气泡受力进行分析的基础上，采用双流体模型及时间平均方法，建立了用于预测空泡率、液相速度等重要参数径向分布的数学模型，并针对实验条件进行了数值计算，计算值与实验数据吻合得很好。计算结果表明，壁面存在的影响是空泡率分布在近壁处产生尖峰的原因。该文提出一种新的壁面存在引起的作用力的表达式，可以较好地预测层流泡状流的运动情况。
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| 关 键 词： | 层流泡状流 双流体模型 空泡率分布 液相速度分布 |
Mathematic model of laminarbubbly flow |
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| SONG Qiang,YANG Xianyong,LUO Rui,WANG Zhou.Mathematic model of laminarbubbly flow[J].Journal of Tsinghua University(Science and Technology),1998(5). |
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| Authors: | SONG Qiang YANG Xianyong LUO Rui WANG Zhou |
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| Institution: | SONG Qiang,YANG Xianyong,LUO Rui,WANG Zhou Department of Thermal Engineering,Tsinghua University,Beijing 100084,China |
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| Abstract: | Laminar bubbly two phase flow in pipe is a fundamental problem in bubbly two phase flow. A two fluid model of multidimentional laminar bubbly two phase flow is developed and used to analyze vertical pipe flows. A new relational expression of wall force is used which makes the model more reasonable. A finite difference method is utilized to perform the numerical evaluations. Good agreement is found with the available data when suitable coefficients for the lift force and wall force on the dispersed phase are used. |
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| Keywords: | laminar bubbly flow two fluid model void fraction distribution liquid velocity distribution |
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