| 隔热材料导热系数的数值模拟预测 |
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| 引用本文： | 白敏丽,薛莹莹,吕继组,牛玲.隔热材料导热系数的数值模拟预测[J].热科学与技术,2007,6(2):136-140. |
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| 作者姓名： | 白敏丽 薛莹莹 吕继组 牛玲 |
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| 作者单位： | 1. 大连理工大学,能源与动力学院,辽宁,大连,116023
2. 沈阳航空工业学院,飞行器动力与能源工程学院,辽宁,沈阳,110136 |
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| 基金项目： | 国家自然科学基金;辽宁省自然科学基金 |
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| 摘 要： | 对氧化锆空心球隔热材料进行合理的简化,用数值模拟方法计算氧化锆空心球隔热材料导热系数,并分析空心球半径、温度、发射率等对导热系数的影响。数值模拟结果表明,减小空心球半径,降低空心球表面发射率,抽真空等都有助于降低隔热材料导热系数。数值模拟与实验测量结果良好吻合,用数值模拟计算隔热材料导热系数是一个行之有效的方法。
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| 关 键 词： | 隔热材料 空心球 导热系数预测 数值模拟 |
| 文章编号： | 1671-8097（2007）02-0136-05 |
| 修稿时间： | 2006-11-302007-01-12 |
Numerical simulation of thermal conductivity of thermal insulating materials |
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| BAI Min-li,XUE Ying-ying,L Ji-zu,NIU Ling.Numerical simulation of thermal conductivity of thermal insulating materials[J].Journal of Thermal Science and Technology,2007,6(2):136-140. |
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| Authors: | BAI Min-li XUE Ying-ying L Ji-zu NIU Ling |
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| Affiliation: | 1. School of Energy and Power Eng. , Dalian Univ. of Tech. , Dalian 116023, China; 2. School of Aerocraft Energy and Power Eng. , Shenyang Inst. of Aeronautical Eng. , Shenyang 110136, China |
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| Abstract: | The ZrO2 hollow sphere thermal insulating material was simplified reasonably and the thermal conductivity of the material was calculated by numerical simulation.The effect on thermal conductivity of radius,temperature,emissivity,etc,was analyszed.The results indicate that reducing the radius of sphere and the emissivity of surface and vacuumizing the hollow are very effective for reducing the thermal conductivity.The results agree well with the experimental results and numerical simulation is a effective way to estimate the thermal conductivity. |
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| Keywords: | thermal insulating materials the estimate of thermal conductivity numerical simulation |
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