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| Ambient Temperature Inside Liquid-cooled Electronic Pod |
| Received:January 25, 2021 Revised:March 31, 2021 |
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| DOI：10.7643/issn.1672-9242.2022.04.013 |
| KeyWord:liquid-cooled electronic pods bleed air temperature liquid supply temperature season interval probability the dynamic stabilization time |
| Author | Institution |
| BAO Sheng |
The 29th Research Institute of CETC, Chengdu , China |
| WANG Jing-tao |
The 29th Research Institute of CETC, Chengdu , China |
| SI Jun-shan |
The 29th Research Institute of CETC, Chengdu , China |
| QI Cheng-wu |
The 29th Research Institute of CETC, Chengdu , China |
| CHU Xin |
The 29th Research Institute of CETC, Chengdu , China |
| WANG Chao |
The 29th Research Institute of CETC, Chengdu , China |
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| Abstract: |
| This paper aims to provide actual measurement data support for the design of an electronic pod thermal management system and reliability prediction. The liquid-cooled electronic pods are mounted on the aviation platform to obtain the temperature environment parameters inside the pods by collecting the temperature data inside the electronic pods under different seasons and different flight conditions. The results show that, within the range of statistical conditions, the fluctuation range of bleed air temperature is ‒30~54 ℃, and interval probability in 0~30 ℃ is 80.8%, however, the fluctuation range of supply liquid temperature is ‒5~46 ℃, and the interval probability in 10~40 ℃ is 85.3%. The temperature level of bleed air and supply liquid inside liquid-cooling electronic pod shows obvious seasonal characteristics, which means from winter to spring/autumn, and to summer, the temperature of bleed air and supply liquid rise in order. As the temperature of bleed air is higher in summer, the environmental control system can make the liquid supply temperature significantly lower than the bleed air temperature. This paper concludes that the fluctuation range of the liquid supply temperature of the liquid-cooled electronic pod is obviously smaller than that of bleed temperature, which is affected by the heat capacity of the environmental control system, electronic equipment and electronic pod structure, and it is more advantageous to improve the reliability of electronic equipment. The dynamic stabilization time of the liquid supply temperature is about 5 minutes, which means that when the continuous working time is less than 5 minutes, it is necessary to carry out transient condition assessment in thermal design. |
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