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Heat-Transfer Analysis of Thermally-Developing Region of Annular Porous Media

机译:环状多孔介质热发生区的传热分析

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A two-equation model is adopted to analyze the heat-transfer processes in the thermally-developing region of a porous annulus. The two-equation model considers different energy equations for the solid and the air. A thermal-entrance effect function is included in the modeling of thermal dispersion conductivity to account for the enhanced heat-transfer characteristics of the fluid in the thermally developing region. The calculated wall temperature distributions under different heating conditions and Reynolds numbers are in good agreement with experimental data. From the Calculated results, it is found that the flow accelerates due to flow heating in the axial direction. The heat transfer and temperature difference between the solid and the fluid reaches a maximum near the wall and then decreases in the transverse direction.
机译:采用两方程模型分析了多孔环带热生成区域的传热过程。两方程模型考虑了固体和空气的不同能量方程。在导热系数的建模中包括了热入口效应函数,以说明在热显影区域中流体增强的传热特性。在不同加热条件下的壁温分布和雷诺数与实验数据吻合良好。根据计算结果,发现由于轴向上的流加热而使流加速。固体和流体之间的热传递和温度差在壁附近达到最大值,然后在横向方向上减小。

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