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| Simulation and Verification of Effects of Contact Thermal Resistance on Performance Test of Aircraft Thermal Insulation Tile at 1 200 ℃ |
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| DOI：10.7643/issn.1672-9242.2023.02.006 |
| KeyWord:contact thermal resistance insulation materials experiment test heat transfer process numerical simulation ceramic insulation tile |
| Author | Institution |
| XIA Lin-shi |
Thermal Protection Experimental Center, Beijing Institute of Space Long March Vehicle, Beijing , China |
| YANG Hai-long |
National Key Laboratory of Science and Technology on Advanced Functional Composites Technology, Aerospace Research Institute of Materials & Processing Technology, Beijing , China |
| NA Wei |
Thermal Protection Experimental Center, Beijing Institute of Space Long March Vehicle, Beijing , China |
| YANG Kai-wei |
Thermal Protection Experimental Center, Beijing Institute of Space Long March Vehicle, Beijing , China |
| SUN Bo |
Thermal Protection Experimental Center, Beijing Institute of Space Long March Vehicle, Beijing , China |
| SHI Bao-li |
Thermal Protection Experimental Center, Beijing Institute of Space Long March Vehicle, Beijing , China |
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| Abstract: |
| The work aims to establish a unified performance test standard for aircraft insulation materials. The heat transfer model of aircraft insulation tile in thermal environment performance test at 1 200 ℃ was calculated by the numerical method. A comparative test of thermal insulation performance of three kinds of thermal insulation materials with different thermal conductivity and surface roughness was designed. The calculated results were basically consistent with the measured data when the combined effects of complete contact heat conduction between the concave and convex points, heat conduction of the contact gap medium and radiation heat transfer of the adjacent interface were considered. It was proved that the contact thermal resistance was the main reason for the inconsistency between the measured data and the ideal heat transfer results. The relationship between thermal diffusivity and heat transfer process under the condition of contact thermal resistance was obtained, and the effect of three different thermal conductivity and roughness bottom insulation materials on thermal insulation performance was quantitatively obtained under the same test conditions. It is concluded that the main reason for the large deviation of test results is the surface roughness. The two contact surfaces are more favorable for heat flux propagation at high temperature. The research results can provide an important reference for the design of aircraft thermal protection system and the determination of performance test scheme. |
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