Volume 37 Issue 8
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JOURNAL OF MECHANICAL ENGINEERING  > 2022  >  37(8): 1569-1578.
LI Hongyang，WANG Xiao，SUN Chao.Calculation and analysis of temperature distribution of single expansion after⁃body based on conjugate heat transfer［J］.Journal of Aerospace Power，2022，37（8）：1569‑1578. doi: 10.13224/j.cnki.jasp.20210346
Citation: LI Hongyang，WANG Xiao，SUN Chao.Calculation and analysis of temperature distribution of single expansion after⁃body based on conjugate heat transfer［J］.Journal of Aerospace Power，2022，37（8）：1569‑1578. doi: 10.13224/j.cnki.jasp.20210346
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Calculation and analysis of temperature distribution of single expansion after⁃body based on conjugate heat transfer

doi: 10.13224/j.cnki.jasp.20210346

  • Shenyang Aircraft Design and Research Institute，Aviation Industry Corporation of China，Limited，Shenyang 110035，China

  • Received Date: 04 Jul 2021
    Available Online: 06 Sep 2022
  • Issue Publish Date: 28 Aug 2022
    Abstract
  • Based on the conjugate heat transfer numerical simulation method，the wall temperature distribution of single expansion after⁃body of a high stealth unmanned aerial vehicle （UAV） was studied.The problem of excessive mesh caused by large area and thin thickness of skin and side plate structure was solved by using thin⁃walled layer mesh.A high⁃precision calculation model was constructed，and the relevant calculation and analysis was completed.The main conclusions were made as follows：although the traditional single fluid calculation can obtain similar temperature distribution，the temperature value was much higher，and the maximum difference can be more than 50 K；the results of conjugate heat transfer calculation were more practical，and could furthermore obtain the temperature gradient distribution in the structure，providing a guidance for thermal stress analysis and structural design；comparing the effects of different metal materials under the same flow conditions，the wall temperature extreme value of a high temperature resistant alloy was about 30 K higher than that of metal steel，and the temperature difference between the upper and lower walls was larger and the gradient was higher.The temperature gradient extreme values of longitudinal ribs of the two materials were 120 K/cm and 65 K/cm，respectively.

     

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