对于纤维增强SiO2气凝胶复合隔热材料的等效热导率,以往主要通过提出简化结构之后利用等效电路方法进行理论求解.本文提出一种纤维结构的计算机随机生成方法,生成了不同的纤维-气凝胶复合材料等效结构单元;采用三维格子Boltzmann模型求解该等效结构的温度场,并计算了复合材料常温下的等效热导率.本文数值预测结果与理论计算结果及相关实验结果吻合良好,表明本文模型能够有效地预测纤维-气凝胶复合材料的等效热导率.
参考文献
| [1] | Tao Xie;Ya-Ling He;Zi-Jun Hu .Theoretical study on thermal conductivities of silica aerogel composite insulating material[J].International Journal of Heat and Mass Transfer,2013(1/2):540-552. |
| [2] | Gaosheng Wei;Yusong Liu;Xinxin Zhang;Fan Yu;Xiaoze Du .Thermal conductivities study on silica aerogel and its composite insulation materials[J].International Journal of Heat and Mass Transfer,2011(11/12):2355-2366. |
| [3] | Lu, G.;Wang, X.-D.;Duan, Y.-Y.;Li, X.-W. .Effects of non-ideal structures and high temperatures on the insulation properties of aerogel-based composite materials[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2011(22/23):3822-3829. |
| [4] | Zhao, J.-J.;Duan, Y.-Y.;Wang, X.-D.;Wang, B.-X. .An analytical model for combined radiative and conductive heat transfer in fiber-loaded silica aerogels[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2012(10):1303-1312. |
| [5] | Moran Wang;Qinjun Kang;Ning Pan .Thermal conductivity enhancement of carbon fiber composites[J].Applied thermal engineering: Design, processes, equipment, economics,2009(2/3):418-421. |
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