Although forced convection in porous media has been studied for many years, there are only relatively few investigations of convective heat transfer in porous metal with porosity higher than 0.9.This paper reports an ...Although forced convection in porous media has been studied for many years, there are only relatively few investigations of convective heat transfer in porous metal with porosity higher than 0.9.This paper reports an experimental study on convective heat transfer and pressure drop in high porosity porous aluminum.Four typical samples with the same porosity 0.92 but different pore density (10 PPI and 20 PPI) or material (A356 Al alloy and 6101 Al alloy) were used in the test.In order to measure volumetric convective heat transfer coefficient of air flowing in the samples, a single blow mathematical model was developed and the experimental setup was built.The air frontal velocity was located in 0.6 m·s -1 to 2.6 m·s -1.The effects of pore density and material on the heat transfer and pressure drop characteristics were discussed.The results showed that pore density affected the heat transfer coefficient and pressure drop drastically while the effect of material (and manufacture) was quite different for different pore densities.More work is to be done on the relations between the microstructure and the macro heat transfer performance of porous aluminum.展开更多
文摘Although forced convection in porous media has been studied for many years, there are only relatively few investigations of convective heat transfer in porous metal with porosity higher than 0.9.This paper reports an experimental study on convective heat transfer and pressure drop in high porosity porous aluminum.Four typical samples with the same porosity 0.92 but different pore density (10 PPI and 20 PPI) or material (A356 Al alloy and 6101 Al alloy) were used in the test.In order to measure volumetric convective heat transfer coefficient of air flowing in the samples, a single blow mathematical model was developed and the experimental setup was built.The air frontal velocity was located in 0.6 m·s -1 to 2.6 m·s -1.The effects of pore density and material on the heat transfer and pressure drop characteristics were discussed.The results showed that pore density affected the heat transfer coefficient and pressure drop drastically while the effect of material (and manufacture) was quite different for different pore densities.More work is to be done on the relations between the microstructure and the macro heat transfer performance of porous aluminum.
