摘要
预测防热涂层热防护性能有三个技术关键:即描述三层结构热响应守恒方程的建立,三层结构热物理性能的确定以及防热涂层表面边界条件的建立,本文用粗糙度测量仪测量了表面形貌,表面等高面和表面粗糙度曲线,为建立防热涂层热防护性能的物理模型提供依据。利用参数辨识灵敏度法对防热涂层材料导热系数进行参数估计,取得了有用的结果。分析不同工艺的表面烧蚀特性,建立了三种表面边界条件。本文讨论了涂层材料在加热过程中出现的三层结构的吸热机理,建立不同层反映不同功能的守恒方程。给出了防热涂层热防护性能预测与试验结果的比较,比较的结果是满意的。
There are three technical crux for predicting thermal protection performance of coating material , that are to establish conservation equations of thermal response for three layers, to determine the thermal physical property parameters for three layers and to give the surface boundary condition. The surface pattern, surface roughness contour and roughness curve were measured with roughness meter, it provides basis for physical module of thermal protection property of coating material. The parameter estimate of thermal conductivity coefficient was done using sensitivity method of system identification, the useful results was obtained. To analyze the surface pattern of difference technology, the boundary condition of three types were given. The thermal protection mechanism of three layer for coating material under heating process was discussed, the conservation equations which reflects difference function was established. The comparison between the prediction and ARC experimental results for thermal protection property of coating material was presented, it shows a good agreement.
出处
《空气动力学学报》
CSCD
北大核心
2004年第1期24-28,共5页
Acta Aerodynamica Sinica
基金
国家自然科学基金项目(10072056).
关键词
防热涂层材料
热防护性能
战术导弹
表面烧蚀
thermal coating material
predicting method of thermal protection performance
