| 刘杨,李维仲.垂直上升气液环状流流动参数的数值计算[J].计算力学学报,2011,28(1):96~101 |
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| 垂直上升气液环状流流动参数的数值计算 |
| Numerical simulation on vertical upward gas-liquid annular flow |
| 投稿时间：2009-11-08 修订日期：2010-10-15 |
| DOI：10.7511/jslx201101018 |
| 中文关键词: 环状流 两相流 CFD 数值模拟 夹带 沉积 |
| 英文关键词:annular flow two-phase flow CFD numerical simulation entrainment deposition |
| 基金项目:国家自然科学基金(50976017);国家自然科学基金重点(50736001)资助项目. |
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| 中文摘要: |
| 提出了一个新的气核-液膜耦合模型来求解垂直上升气液环状流在充分发展段的流动参数。本模型考虑了液膜、气核以及它们之间的相互影响和作用。模型中基本的气核区域和液膜区域的质量和动量方程由Fluent6.3.26进行求解,而液滴方程以及相界面上的夹带和沉积作用通过用户自定义接口函数UDF(User Defined Function)进行嵌入式编程处理。数值模拟结果显示流动方向上的压力梯度和壁面剪切力随入口气体和液体速度的增加而增加,而夹带分数和液膜厚度对入口液体速度不敏感,他们的值只随入口气体速度的变化而变化。模拟结果与实验结果的对比表明本模型适于这种流动的计算。 |
| 英文摘要: |
| A new film-gas core coupled model is proposed to account for vertical upward developed gas-liquid annular flow in this paper. Present model includes film flow, gas core flow as well as the effect of their interactions. Governing equations are solved by Fluent6.3.26 while the droplet equation, interfacial entrainment and deposition are accounted for by user defined function. Results show that pressure gradient and wall shear stress increase with inlet gas and liquid velocity, while entrainment fraction and film thickness results are not sensitive to inlet liquid velocity. Comparison of simulation results with experimental data implies that present model can well describe upward gas-liquid annular flow. |
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