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| Experimental Study on Simulated Service Conditions of Glass Fiber-reinforced SiO2 Aerogel Composites in Thermal/Natural Alternating Environment |
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| DOI：10.7643/issn.1672-9242.2023.03.007 |
| KeyWord:composites environmental effects service condition thermal conductivity thermal insulation performance |
| Author | Institution |
| PENG Xing |
Southwest Institute of Technology and Engineering, Chongqing , China |
| SUN Cai-yun |
Southwest Institute of Technology and Engineering, Chongqing , China |
| CONG Da-long |
Southwest Institute of Technology and Engineering, Chongqing , China |
| CHEN Han-bin |
Southwest Institute of Technology and Engineering, Chongqing , China |
| WU Yong-peng |
Southwest Institute of Technology and Engineering, Chongqing , China |
| ZHOU Fu |
Southwest Institute of Technology and Engineering, Chongqing , China |
| TANG Jing-jing |
Southwest Institute of Technology and Engineering, Chongqing , China |
| DONG Ling-shu |
Southwest Institute of Technology and Engineering, Chongqing , China |
| GAO Shi-qing |
Southwest Institute of Technology and Engineering, Chongqing , China |
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| Abstract: |
| The work aims to study the degradation law of glass fiber-reinforced aerogel composites in the thermal/natural alternating environment of the equipment nacelle with the experimental time of the simulated service conditions, and to improve the control level of the thermal/natural alternating environmental effect of the equipment nacelle. With fiber-reinforced aerogel composites as the research object, humid heat, salt spray and high temperature tests as the thermal/natural alternating environment test spectrum, and vibration test as the acceleration factor, the five-cycle laboratory simulation of the service working condition acceleration experiment was carried out, and the initial state of the sample and the performance after each cycle of test were compared and analyzed. After the simulated service condition test, the color of the glass fiber-reinforced SiO2 aerogel composites gradually changed from white to yellow. The content of SiO2 aerogel gradually decreased. The composition of the fiber elements did not change significantly. The thermal conductivity increased. The thermal insulation performance decreased, and all of them changed significantly after the four-cycle simulation of the service condition test. After five cycles of simulated service test, the thermal conductivity of glass fiber-reinforced SiO2 aerogel composites is only 0.026 4 W/(m.K), the average temperature of the cold surface is only 68.5 ℃ when the hot surface temperature is 200 ℃, and the thermal/natural alternating temperature difference is 43.5 ℃, which has good environmental adaptability. |
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