Numerical Study of the Influence of Coupling Interface Emissivity on Aerogel Metal Thermal Protection Performance
For aerogels in metal thermal protection system (MTPS), radiative heat transfer will participate in the thermal transport process. Therefore, the influence of the emissivity of the coupling interface between metal and aerogels on thermal insulation performance is considered an important research foc...
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| Format: | Article |
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MDPI AG
2021-12-01
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| Series: | Gels |
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| Online Access: | https://www.mdpi.com/2310-2861/7/4/250 |
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| author | Fengfei Lou Sujun Dong Yinwei Ma Bin Qi Keyong Zhu |
| author_facet | Fengfei Lou Sujun Dong Yinwei Ma Bin Qi Keyong Zhu |
| author_sort | Fengfei Lou |
| collection | DOAJ |
| description | For aerogels in metal thermal protection system (MTPS), radiative heat transfer will participate in the thermal transport process. Therefore, the influence of the emissivity of the coupling interface between metal and aerogels on thermal insulation performance is considered an important research focus. In this paper, CFD numerical simulation is performed to study the influence of emissivity on the performance with different extinction coefficients at different boundary temperatures. The finite volume method and the discrete ordinate method are used to solve the govern equations. The results show that when the boundary temperatures are 600 K and 2100 K, the extinction coefficient is 50 m<sup>−1</sup>, and the reduction percentage of the effective thermal conductivity with an emissivity of 0.2 can be up to 47.5% and 69.8%, compared to the system with an emissivity of 1. Thus, the reduction in emissivity has a good effect on the thermal insulation performance of the MTPS at a higher boundary temperature for materials with small extinction coefficients. |
| first_indexed | 2024-03-10T04:03:37Z |
| format | Article |
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| issn | 2310-2861 |
| language | English |
| last_indexed | 2024-03-10T04:03:37Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Gels |
| spelling | doaj.art-bdcbf32ddd564751bd613f99fc52ab252023-11-23T08:28:34ZengMDPI AGGels2310-28612021-12-017425010.3390/gels7040250Numerical Study of the Influence of Coupling Interface Emissivity on Aerogel Metal Thermal Protection PerformanceFengfei Lou0Sujun Dong1Yinwei Ma2Bin Qi3Keyong Zhu4School of Aeronautical Science and Engineering, Beihang University, Beijing 100191, ChinaSchool of Aeronautical Science and Engineering, Beihang University, Beijing 100191, ChinaResearch Department of Airframe Technology, Beijing Institute of Aerospace Technology, Beijing 100074, ChinaQian-Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094, ChinaSchool of Aeronautical Science and Engineering, Beihang University, Beijing 100191, ChinaFor aerogels in metal thermal protection system (MTPS), radiative heat transfer will participate in the thermal transport process. Therefore, the influence of the emissivity of the coupling interface between metal and aerogels on thermal insulation performance is considered an important research focus. In this paper, CFD numerical simulation is performed to study the influence of emissivity on the performance with different extinction coefficients at different boundary temperatures. The finite volume method and the discrete ordinate method are used to solve the govern equations. The results show that when the boundary temperatures are 600 K and 2100 K, the extinction coefficient is 50 m<sup>−1</sup>, and the reduction percentage of the effective thermal conductivity with an emissivity of 0.2 can be up to 47.5% and 69.8%, compared to the system with an emissivity of 1. Thus, the reduction in emissivity has a good effect on the thermal insulation performance of the MTPS at a higher boundary temperature for materials with small extinction coefficients.https://www.mdpi.com/2310-2861/7/4/250metal thermal protection systemaerogelthermal conductivityemissivityradiative heat transfer |
| spellingShingle | Fengfei Lou Sujun Dong Yinwei Ma Bin Qi Keyong Zhu Numerical Study of the Influence of Coupling Interface Emissivity on Aerogel Metal Thermal Protection Performance Gels metal thermal protection system aerogel thermal conductivity emissivity radiative heat transfer |
| title | Numerical Study of the Influence of Coupling Interface Emissivity on Aerogel Metal Thermal Protection Performance |
| title_full | Numerical Study of the Influence of Coupling Interface Emissivity on Aerogel Metal Thermal Protection Performance |
| title_fullStr | Numerical Study of the Influence of Coupling Interface Emissivity on Aerogel Metal Thermal Protection Performance |
| title_full_unstemmed | Numerical Study of the Influence of Coupling Interface Emissivity on Aerogel Metal Thermal Protection Performance |
| title_short | Numerical Study of the Influence of Coupling Interface Emissivity on Aerogel Metal Thermal Protection Performance |
| title_sort | numerical study of the influence of coupling interface emissivity on aerogel metal thermal protection performance |
| topic | metal thermal protection system aerogel thermal conductivity emissivity radiative heat transfer |
| url | https://www.mdpi.com/2310-2861/7/4/250 |
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