Inversion method of non-uniform heat flux load of thermal protection structure for high-speed aircraft

被引：0
|
作者：
Shen D. [1 ,2 ]
Ma H. [1 ,2 ]
Chen Q. [1 ,2 ]
Li Y. [1 ,2 ]
Fei Q. [1 ,2 ]
机构：
[1] School of Mechanical Engineering, Southeast University, Nanjing
[2] Key Laboratory of Structure and Thermal Protection for High-Speed Aircraft of Ministry of Education, Southeastern University, Nanjing
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2024年 / 54卷 / 02期
关键词：
conjugate gradient method; spline curve; thermal protection structure; three-dimensional non-uniform temperature field;
D O I：
10.3969/j.issn.1001-0505.2024.02.023
中图分类号：
学科分类号：
摘要：
To accurately grasp the non-uniform aerodynamic thermal load borne by the thermal protection structure of high-speed aircraft in service, an inversion method of non-uniform heat flow load was proposed based on the conjugate gradient theory. Two kinds of typical non-uniform heat flow loads were studied using the heat insulation tile structure as an example. By introducing first-order spline curve interpolation to characterize the time-varying law of non-uniform heat flow, the number of parameters to be inverted was reduced. The feasibility of the inversion method was analyzed, and the influence of temperature measurement deviations on inversion accuracy was studied. The results show that the number of inversion parameters can be reduced to 4 using the time-varying spline characterization method, which greatly improves the inversion efficiency. The proposed inversion method can accurately invert the time and space distribution characteristics of the non-uniform heat flow load. For the measurement data containing noise, it shows good anti-noise performance due to the use of interpolation reconstruction characterization method. © 2024 Southeast University. All rights reserved.
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页码：447 / 455
页数：8
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