基于透射法的泡沫金属热辐射特性测量方法
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摘要
泡沫金属材料通常属于半透明介质,本文考虑热辐射传输中泡沫金属块材的边缘效应,引入高温热辐射特性测量中的多层结构模型并结合透射法测量热辐射特性的双厚度方法,将泡沫金属材料划分为边缘层、介质层等结构层,建立了边缘层-介质层-边缘层的三层结构模型,基于辐射传输过程获得了泡沫金属块材热辐射特性的求解方法.基于该方法,采用FTIR光谱仪对某孔隙下泡沫镍的热辐射特性进行了实验测量,并与忽略边缘效应的计算结果进行对比,发现边缘效应的存在会明显影响材料整体的热辐射特性参数。
Metallic foam belongs to semitransparent medium. Considering the edge effect of metallic foam bulk in the thermal radiative transfer process, this paper introduced multi-layer structure model from thermal radiative measurements under high temperature combined with the double-thickness method based on transmittance method, and established the solving method for the thermal radiative properties of metallic foam bulk with the edge-medium-edge three-layer structure. Based on this method, the thermal radiative properties of a foam nickel sample with a certain porosity were measured by FTIR spectrometer. Then the results are compared with those obtained without considering the edge effect, finding that the edge effect has significant influence on the thermal radiative properties of metallic foam.
Metallic foam belongs to semitransparent medium. Considering the edge effect of metallic foam bulk in the thermal radiative transfer process, this paper introduced multi-layer structure model from thermal radiative measurements under high temperature combined with the double-thickness method based on transmittance method, and established the solving method for the thermal radiative properties of metallic foam bulk with the edge-medium-edge three-layer structure. Based on this method, the thermal radiative properties of a foam nickel sample with a certain porosity were measured by FTIR spectrometer. Then the results are compared with those obtained without considering the edge effect, finding that the edge effect has significant influence on the thermal radiative properties of metallic foam.
引文
[1] Andreas O, Graeme E M, Marcelo J S L. Cellular and Porous Materials:Thermal Properties Simulation and Prediction[M]. Weinheim:WILEY-VCH Verlag GmbH&Co KGaA, 2008
[2] Cunsolo S, Coquard R, Baillis D, et al. Radiative Properties Mdeling of Open Cell Solid Foam:Review and New Analytical Law[J]. International Journal of Thermal Sciences, 2016, 104:122-134
[3] Loretz M, Coquard R, Baillis D, et al. Metallic Foams:Radiative Properties/Comparison Between Different Models[J]. Journal of Quantitative Spectroscopy and Radiative-Transfer, 2008, 109(1):16-27
[4] Coquard R, Baillis D, Randrianalisoa J. Homogeneous Phase and Multi-phase Approaches for Modeling Radiative Transfer in Foams[J]. International Journal of Thermal Sciences, 2011, 50(9):1648-1663
[5] Coquard R, Rousseau B, Echegut P, et al. Investigations of the Radiative Properties of Al-NiP Foams Using Tomographic Images and Stereoscopic Micrographs[J]. International Journal of Heat and Mass Transfer, 2014, 55(5):1606-1619
[6] Cunsolo S, Oliviero M, Harris W M, et al. Monte Carlo Determination of Radiative Properties of Metal Foams:Comparison between Idealized and Real Cell Structures[J]. International Journal of Thermal Sciences, 2015, 87:94-102
[7] Sacadura J F, Baillis D. Experimental Characterization of Thermal Radiation Properties of Dispersed Media[J].International Journal of Thermal Sciences, 2002, 41(7):699-707
[8] Loretz M, Maire E, Baillis D. Analytical Modelling of the Radiative Properties of Metallic Foams:Contribution of X-Ray Tomography[J]. Advanced Engineering Materials,2008, 10(4):352-360
[9] Baillis D, Raynaud M, Sacadura J F. Spectral Radiative Properties of Open-Cell Foam Insulation[J]. Journal of Thermophysics and Heat Transfer, 1999, 13(3):292-298
[10] WEI Gaosheng, HUANG Pingrui, XU Chao, et al. Experimental Study on the Radiative Properties of Open-cell Porous Ceramics[J]. Solar Energy, 2017, 149:13-19
[11] ZHAO Changying, LU Tianjian, Hodson H P. Thermal Radiation in Ultralight Metal Foams with Open Cells[J]. International Journal of Heat&Mass Transfer, 2004,47(14):2927-2939
[12]徐治国,王美琴,赵长颖.形貌对通孔金属泡沫辐射性能的影响[J].热科学与技术,2015, 14(4):267-271XU Zhiguo, WANG Meiqin, ZHAO Changying. Morphology Effect on Radiation Performance of Open-celled Metal Foams[J]. Journal of Thermal Science and Technology,2015, 14(4):267-271
[13] Palik E D. Handbook of Optical Constants of Solids[M].San Diego:Academic Press, 1998:313-323
[2] Cunsolo S, Coquard R, Baillis D, et al. Radiative Properties Mdeling of Open Cell Solid Foam:Review and New Analytical Law[J]. International Journal of Thermal Sciences, 2016, 104:122-134
[3] Loretz M, Coquard R, Baillis D, et al. Metallic Foams:Radiative Properties/Comparison Between Different Models[J]. Journal of Quantitative Spectroscopy and Radiative-Transfer, 2008, 109(1):16-27
[4] Coquard R, Baillis D, Randrianalisoa J. Homogeneous Phase and Multi-phase Approaches for Modeling Radiative Transfer in Foams[J]. International Journal of Thermal Sciences, 2011, 50(9):1648-1663
[5] Coquard R, Rousseau B, Echegut P, et al. Investigations of the Radiative Properties of Al-NiP Foams Using Tomographic Images and Stereoscopic Micrographs[J]. International Journal of Heat and Mass Transfer, 2014, 55(5):1606-1619
[6] Cunsolo S, Oliviero M, Harris W M, et al. Monte Carlo Determination of Radiative Properties of Metal Foams:Comparison between Idealized and Real Cell Structures[J]. International Journal of Thermal Sciences, 2015, 87:94-102
[7] Sacadura J F, Baillis D. Experimental Characterization of Thermal Radiation Properties of Dispersed Media[J].International Journal of Thermal Sciences, 2002, 41(7):699-707
[8] Loretz M, Maire E, Baillis D. Analytical Modelling of the Radiative Properties of Metallic Foams:Contribution of X-Ray Tomography[J]. Advanced Engineering Materials,2008, 10(4):352-360
[9] Baillis D, Raynaud M, Sacadura J F. Spectral Radiative Properties of Open-Cell Foam Insulation[J]. Journal of Thermophysics and Heat Transfer, 1999, 13(3):292-298
[10] WEI Gaosheng, HUANG Pingrui, XU Chao, et al. Experimental Study on the Radiative Properties of Open-cell Porous Ceramics[J]. Solar Energy, 2017, 149:13-19
[11] ZHAO Changying, LU Tianjian, Hodson H P. Thermal Radiation in Ultralight Metal Foams with Open Cells[J]. International Journal of Heat&Mass Transfer, 2004,47(14):2927-2939
[12]徐治国,王美琴,赵长颖.形貌对通孔金属泡沫辐射性能的影响[J].热科学与技术,2015, 14(4):267-271XU Zhiguo, WANG Meiqin, ZHAO Changying. Morphology Effect on Radiation Performance of Open-celled Metal Foams[J]. Journal of Thermal Science and Technology,2015, 14(4):267-271
[13] Palik E D. Handbook of Optical Constants of Solids[M].San Diego:Academic Press, 1998:313-323