多孔泡沫金属相界面传热系数的研究

Phase interface heat transfer coefficient in porous metal foam

基于简单立方体模型并采用翅片理论分析得出了流体在多孔泡沫金属通道内层流强制对流时相界面传热系数的表达式,并在不同条件下研究了流体流速和孔隙结构对相界面传热系数的影响,结果表明,相界面传热系数随着流体流速的增大而增大,随着多孔泡沫金属孔密度的增大而增大,而随着多孔泡沫金属的孔隙率的增大先增大后减小。

The expression of phase interface heat transfer coefficient between porous metal foam and fluid for laminar forced convection in the channel filled with porous metal foam was obtained based on simple cubic model in conjunction with fin theory.The influence of fluid velocity and pore structure to the phase interface heat transfer coefficient was discussed under different conditions.It is shown that the phase interface heat transfer coefficient increases with fluid velocity,increases with pore density but first increases and then decreases with porosity of porous metal foam.