Numerical and Experimental Investigation on Photothermal Performance of Polyimide/High-Electrical-Performance-Coating Composite Films Considering Surface Roughness

  • JING Peng ,
  • ZHOU Xiao ,
  • XU Zhengyang ,
  • XU Zhiguo
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  • 1. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    2. Sunman (Zhenjiang) Co., Ltd, Zhenjiang 212000, China

网络出版日期: 2023-12-01

基金资助

This work is supported by the National Natural Science Foundation of China (Grant No. 51576126).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

Numerical and Experimental Investigation on Photothermal Performance of Polyimide/High-Electrical-Performance-Coating Composite Films Considering Surface Roughness

  • JING Peng ,
  • ZHOU Xiao ,
  • XU Zhengyang ,
  • XU Zhiguo
Expand
  • 1. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    2. Sunman (Zhenjiang) Co., Ltd, Zhenjiang 212000, China

Online published: 2023-12-01

Supported by

This work is supported by the National Natural Science Foundation of China (Grant No. 51576126).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

摘要

聚酰亚胺薄膜是航天器上常用的重要热控材料,对航天器热平衡有重要影响,但很少有人研究薄膜表面缺陷的影响。在本文中,采用紫外-可见-近红外分光光度计测试了聚酰亚胺薄膜和锗/铟锡氧化物/铝涂层组成的复合薄膜的光热性能,用原子力显微镜观察了其表面形貌。本文创新性的从有限差分的角度将表面粗糙度引入FDTD建模模型,采用考虑表面粗糙度的FDTD方法对复合薄膜的光热性能(包括透光率和透光率)进行了研究。基于均方根粗糙度和相关长度生成的随机粗糙表面,采用FDTD方法对复合薄膜电磁波场进行了表征。结果表明,该方法大大提高了计算精度,数值计算结果令人满意。当考虑表面粗糙度时,与实验数据吻合良好。研究结果表明,涂层材料和厚度对复合薄膜光热性能有显著影响。

本文引用格式

JING Peng , ZHOU Xiao , XU Zhengyang , XU Zhiguo . Numerical and Experimental Investigation on Photothermal Performance of Polyimide/High-Electrical-Performance-Coating Composite Films Considering Surface Roughness[J]. 热科学学报, 2022 , 31(4) : 1206 -1219 . DOI: 10.1007/s11630-022-1453-7

Abstract

Polyimide (PI) films are the common and important components on spacecraft for thermal control. Their parameter design accuracy has an important impact on the spacecraft thermal balance but there are few studies focusing on the effect of film surface defects. In the present study, photothermal properties of composite films made of PI films and germanium/indium tin oxide/aluminum coatings are obtained by UV-VIS-NIR spectrophotometer. The film surface morphology of composite films is obtained by the atomic force microscope. The present study creatively introduces surface roughness into modeling from the perspective of finite-difference time-domain (FDTD) model. The FDTD method considering surface roughness is used to present a comprehensive investigation on the coating effect on the photothermal properties including transmittance and reflectance of composite films. Based on the random rough surface generated by root-mean-square (RMS) roughness and correlation length, the FDTD method is applied to characterize the electromagnetic field of composite films. It has been found that the numerical accuracy is greatly improved and the numerical results agree well with the experimental data when surface roughness is considered. The results also show that coating material and thickness have remarkable impacts on photothermal properties of the composite films.

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