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中文摘要：
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1Hz至10Hz频域中的温度波动的功率谱密度．
英文摘要：
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 mod- el 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 l0 Hz.
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同项目期刊论文
LARGE-EDDY SIMULATIONS OF THE EFFECTS OF FULLY AND PARTIALLY PACKED SINTERED POROUS MEDIA ON THE MIX
Large-eddy simulations (LES) of temperature fluctuations in a mixing tee with/without a porous mediu
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