泡沫镁散热器强制对流散热性能模拟研究
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摘要
通孔泡沫镁合金因其比表面较大且金属骨架的导热系数大,兼具强度、硬度高等特点,有望成为散热器的核心材料,以解决电子产品的散热问题。本文通过数值模拟的方法对泡沫镁合金散热器在强制对流下的散热情况进行探讨。结果表明,泡沫镁散热器散热效果优于传统散热器。其结构参数对其散热性能影响较大,表面传热系数、压降都随孔隙率、孔径的增大而减小,但其综合散热性能却随着孔隙率、孔径的增大而增大。
Foamed magnesium is expected to become the core material of the radiator to solve the cooling problem of electronic products,because of its larger specific surface area,and the thermal conductivity of the metal skeleton. The heat dissipation of foamed magnesium radiator under forced convection was discussed. The results showed that the cooling effect of two kinds o foamed magnesium radiator is better than the traditional CPU radiator and the factors influencing the heat dissipating tproperty includes porosity,and pore size. The surface heat transfer coefficient and the pressure drop of the foamed magnesium radiator decreases with the increase of porosity and pore size,while the comprehensive heat dissipation increases with the increasing porosity and pore size.
Foamed magnesium is expected to become the core material of the radiator to solve the cooling problem of electronic products,because of its larger specific surface area,and the thermal conductivity of the metal skeleton. The heat dissipation of foamed magnesium radiator under forced convection was discussed. The results showed that the cooling effect of two kinds o foamed magnesium radiator is better than the traditional CPU radiator and the factors influencing the heat dissipating tproperty includes porosity,and pore size. The surface heat transfer coefficient and the pressure drop of the foamed magnesium radiator decreases with the increase of porosity and pore size,while the comprehensive heat dissipation increases with the increasing porosity and pore size.
引文
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[2]汪双凤,李炅,张伟保.开孔泡沫金属用于紧凑型热交换器的研究进展[J].化工进展,2008,27(5):675-678.
[3]余建祖.电子设备热设计及分析技术[M].高等教育出版社,2002.
[4]徐梦欣.泡沫镁合金的制备与性能研究[D].太原:太原科技大学,2010.
[5]王超星,王芳,王录才.通孔泡沫金属传热性能研究进展[J].铸造设备与工艺,2011(5):42-44.
[6]Kim S Y,Paek J W,Kang B H.Flow and Heat Transfer Correlations for Porous Fin in a Plate-Fin Heat Exchanger[J].Journal of Heat Transfer,2000,122(3):572-578.
[7]王晓鲁,姜培学,单或垚.泡沫金属与板翅结构强化换热研究[J].工程热物理学报,2008(1):121-123.
[8]史玉凤,刘红,孙文策.多孔介质有效导热系数的实验与模拟[J].四川大学学报:工程科学版,2011,43(3):198-203.
[9]屈治国,徐治国,陶文铨,等.通孔金属泡沫中的空气自然对流传热实验研究[J].西安交通大学学报,2009,43(1):1-4.
[10]谭礼明,南森,王芳,等.泡沫金属散热性能及应用前景[J].铸造设备与工艺,2016(3):51-54.