| An Analysis of Thermal Conductivity of Ceramic Fibrous Insulator by Modeling & Simulation Method I |
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Hyung Kang, Yong-Kee Baek |
| 모델링/시뮬레이션 기법을 이용한 세라믹 섬유 단열재의 열전도도 해석 I |
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강형, 백용기 |
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국방과학연구소 |
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| Abstract |
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Thermal conductivity of ceramic fibrous insulator was analysed and predicted by using the modeling/simulation technique. Ceramic fibrous insulators are widely used as high temperature insulator on account of their lightweight mass and heat resisting properties. Especially it is suitable to protect the high speed aircraft and missiles from severe aero-thermodynamic heating. Thermal conductivity of ceramic fibrous insulator could be determined from the conductive heat transfer and the radiative heat transfer through the insulator. In order to estimate conductive thermal conductivity, homogenization technique was applied, while radiative thermal conductivity was computed by means of random number and radiation probability. Particularly radiation probability can make it possible to estimate the conductivity of fibrous insulator without any experimental constant. The calculated conductivity predicted in the present study have a reasonable accuracy with an average error of 7 percent to experimental data. |
| Key Words:
ceramic fibrous insulator, homogenization technique, conductive heat transfer, radiative heat transfer, radiative probability |
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