Volume 37 Issue 4
Apr.  2022
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SHI Yu, XIA Xinlin, CHEN Xue, WANG Qinyang, KANG Honglin. Inversion of thermal conductivity of quartz window based on transient thermal response at high temperature[J]. Journal of Aerospace Power, 2022, 37(4): 755-764. doi: 10.13224/j.cnki.jasp.20210222
Citation: SHI Yu, XIA Xinlin, CHEN Xue, WANG Qinyang, KANG Honglin. Inversion of thermal conductivity of quartz window based on transient thermal response at high temperature[J]. Journal of Aerospace Power, 2022, 37(4): 755-764. doi: 10.13224/j.cnki.jasp.20210222

Inversion of thermal conductivity of quartz window based on transient thermal response at high temperature

doi: 10.13224/j.cnki.jasp.20210222
  • Received Date: 2021-05-09
  • Publish Date: 2022-04-28
  • A method for simultaneous inversion of thermal conductivity of quartz window at different temperatures was presented by using transient thermal response information under high temperature heating.Combining the experimental test process,a high-temperature non-gray body radiative and conductive heat transfer model with a quartz window-graphite plate-quartz window sandwich structure was established firstly.Through the actual temperature response and the material's spectral radiation characteristic parameters,the genetic algorithm was used for constructing the inversion and identification model of the thermal conductivity of quartz window.The thermal conductivity of quartz window was inversed by the result data of 1 100 K heating conditions,ranging from 1.35 to 2.58 W/(m·K) at room temperature to 1 100 K,and the relationship between thermal conductivity and temperature was fitted.The influence of radiation on the thermal conductivity of the material increased with the temperature,accounting for 16.12% at 1 100 K.Finally,the method and the accuracy of the thermal conductivity data were verified by the additional high-temperature tests.

     

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