| 填充烧结铜球的T型管中流体混合的大涡模拟 |
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| 引用本文： | 王永伟,卢涛,姜培学,成鹏飞,王奎升.填充烧结铜球的T型管中流体混合的大涡模拟[J].应用数学和力学,2012,33(7):856-867. |
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| 作者姓名： | 王永伟 卢涛 姜培学 成鹏飞 王奎升 |
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| 作者单位： | 1.北京化工大学 机电工程学院,北京 100029; |
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| 基金项目： | 国家自然科学基金资助项目，国家基础研究计划基金资助项目，高等学校博士学科点专项科研基金资助项目，北京市科技新星计划基金资助项目 |
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| 摘 要： | 在FLUENT软件平台上，运用大涡模拟湍流模型及Smagorinsky-Lilly亚格子尺度模型，对填充有烧结铜球多孔介质的T型管道内冷热流体混合过程的流动与传热情况进行了数值计算，与未填充多孔介质时混合区域内的平均温度和温度波动、平均速度和速度波动等数据进行了对比，并对温度波动进行了功率谱密度分析．数值结果表明，多孔介质可有效削弱T型通道流体混合区域内的温度和速度波动，有效降低1 Hz至10 Hz频域中的温度波动的功率谱密度．
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| 关 键 词： | 大涡模拟 混合 T型管道 烧结铜球 |
| 收稿时间： | 2011-06-10 |
LES of Fluid Mixing in a Tee With a Sintered Porous Medium |
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| WANG Yong-wei
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LU Tao
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JIANG Pei-xue
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CHENG Peng-fei
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WANG Kui-sheng.LES of Fluid Mixing in a Tee With a Sintered Porous Medium[J].Applied Mathematics and Mechanics,2012,33(7):856-867. |
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| Authors: | WANG Yong-wei LU Tao JIANG Pei-xue CHENG Peng-fei WANG Kui-sheng |
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| Institution: | 1.1School of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R.China;2Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, P.R.China |
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| Abstract: | Mixing processes of hot and cold fluids in a tee with and without sintered copper spheres were simulated by FLUENT using the large-eddy simulation (LES) turbulent flow model and the sub-grid scale (SGS) Smagorinsky-Lilly (SL) model with buoyancy. Comparisons of the numerical results of the two cases with and without sintered copper spheres show that the porous medium significantly reduces the velocity and temperature fluctuations, because the porous medium can effectively restrict the fluid flow and enhance heat transfer. The porous media obviously increase the pressure drop in the main duct. The porous medium reduces the PSD of the temperature fluctuations in the frequency range from 1 Hz to 10 Hz. |
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