东南大学学报（自然科学版）2024，Vol.54Issue(2)：447-455,9.DOI:10.3969/j.issn.1001-0505.2024.02.023
高速飞行器热防护结构非均匀热流载荷反演方法
Inversion method of non-uniform heat flux load of thermal protection structure for high-speed aircraft
摘要
Abstract
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 charac-terize 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-uni-form heat flow load.For the measurement data containing noise,it shows good anti-noise performance due to the use of interpolation reconstruction characterization method.关键词
热防护结构/样条曲线/共轭梯度法/三维非均匀温度场Key words
thermal protection structure/spline curve/conjugate gradient method/three-dimensional non-uni-form temperature field分类
航空航天引用本文复制引用
沈冬,马晗,陈强,李彦斌,费庆国..高速飞行器热防护结构非均匀热流载荷反演方法[J].东南大学学报（自然科学版）,2024,54(2):447-455,9.基金项目
国家自然科学基金资助项目(52125209,52175220,52302514)、江苏省自然科学基金资助项目(BK20211558)、江苏省科技厅重点研发产业前瞻项目(BE2022158)、东南大学"仲英青年学者"资助项目. （52125209,52175220,52302514）
