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| Application and Development of a Novel Device for Long Time Heat-flow Measurement |
| Received:August 15, 2019 Revised:December 13, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2020.01.006 |
| KeyWord:heat flow measurement sensor aircraft sensitive side |
| Author | Institution |
| LIU Guo-qian |
Key Laboratory of Science and Technology on Space Physics, China Academy of Launch Vehicle Technology, Beijing , China |
| LI Yu |
Key Laboratory of Science and Technology on Space Physics, China Academy of Launch Vehicle Technology, Beijing , China |
| LIU Yu-fei |
Key Laboratory of Science and Technology on Space Physics, China Academy of Launch Vehicle Technology, Beijing , China |
| XU Xiao-liang |
Key Laboratory of Science and Technology on Space Physics, China Academy of Launch Vehicle Technology, Beijing , China |
| CUI Zhan-zhong |
Key Laboratory of Science and Technology on Space Physics, China Academy of Launch Vehicle Technology, Beijing , China |
| ZHOU Yu |
Key Laboratory of Science and Technology on Space Physics, China Academy of Launch Vehicle Technology, Beijing , China |
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| Abstract: |
| The paper aims to design a new type of heat flow measuring device, to make the sensor meet the needs of heat flow measurement for a long time. The external surface of the sensor can be moderately ground to fit with the aerodynamic exterior surface of the aircraft properly. With copper and steel as alternative materials, the same surface heat flux boundary was applied to contrast sensitive side temperature difference inside and outside the wall. The heat transmission path and the of the sensitive side thickness of the heat flow thickness identification sensor were optimized to analyze the influences on the grinding heat flux identification results through the finite element model. Based on optimization results, the heat flow measuring device was developed, and the effectiveness of the device was verified through ground test. From the perspective of time delay obtained from thermal response, Cu had a great advantage than steel. After comprehensive consideration, the sensitive side surface needed be grounded according to the exterior surface the aircraft. The thickness of 5 mm had safety and reliability to a certain extent. Proper grounding of the sensitive side had little effect on the temperature measurement results. Heat flow data obtained through identification was in line with the actual control of heat flow, and the maximum deviation was about 15%. The heat flow measurement device is developed successfully, and its validity is proved through the ground thermal test. |
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