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本文通过对发汗冷却的多孔区域进行二维非热平衡数值模拟,研究了多孔介质区域进口处对流换热系数、冷却剂流量局部降低以及多孔介质受热表面热流密度局部增大对青铜、陶瓷两种不同多孔材料的温度场的影响。计算结果表明,冷却剂在进口处与多孔壁面对流换热系数的增大使多孔介质内部趋向于热平衡;热端壁面对流换热系数、冷却剂流量的局部变化对陶瓷多孔壁面在该局部区域的影响要大于青铜多孔壁面,但青铜多孔壁面受影响的区域更大,而冷却剂流量的局部降低对两种材料固体、流体间温差的影响程度基本一致。
In this paper, two-dimensional non-thermal equilibrium numerical simulation of sweat-cooled porous region was carried out. The effects of convection heat transfer coefficient, local reduction of coolant flow and local heat flux density on the heated surface of porous media were investigated for bronze and ceramics Effect of temperature field on porous materials. The results show that the increase of the convective heat transfer coefficient between the inlet and the porous wall tends to make the interior of the porous medium more thermally balanced. The influence of local changes of convective heat transfer coefficient and coolant flow on the porous ceramic wall in the localized area Is larger than that of the bronze porous wall, but the area affected by the bronze porous wall is larger. However, the local decrease of the coolant flow has the same effect on the temperature difference between the two materials and the fluid.