冯·卡门曲面整流罩PMI泡沫夹层防热结构技术研究  

Research of the Thermal Protection-structure Technique by Von-Karman Fairing with PMI Foam Sandwich Structure

作　　者：尹莲花 骆洪志 吴会强 陈友伟 王晔 Yin Lian-hua;Luo Hong-zhi;Wu Hui-qiang;Chen You-wei;Wang Ye(Beijing Institute of Astronautical Systems Engineering,Beijing,100076)

机构地区：[1]北京宇航系统工程研究所,北京100076

出　　处：《导弹与航天运载技术》2021年第3期43-46,共4页Missiles and Space Vehicles

摘　　要：由于新一代运载火箭整流罩冯·卡门锥段采用聚甲基丙烯酰亚胺(Polymethacrylimide,PMI)泡沫夹层结构,其导热性能是铝蜂窝的1/50,将导致泡沫外层的玻璃钢温度急剧上升,因此防热结构软木的热环境会比传统整流罩恶劣很多。运用石英灯加热试验和热解面模型仿真方法,在冷壁热流的边界条件下,得到外壁温度,并最终确定软木的烧蚀热物理性能。然后通过热解面模型仿真结果和石英灯烧蚀试验结果的对比证明了这种方法合理可行,最终得到热壁热流输入条件,为最终确定整流罩防热软木厚度提供了一种有效途径。Restricted by the condition and equipment of the experimentation,validly testing all kinds of aero-condition of the sandwich-curve-cone nose with the traditional experimentation method is difficulty and likely endangers the sample.By adjusting and optimizing the magnitude and subsection of the testing load with the method of engineering and FEA,the overall and valid static-experimentation of the sandwich-structure with the Von-Carmen cone is realized.This method is validated by the comparing test.

关 键 词：冯·卡门整流罩 曲面锥 夹层结构 防热结构 PMI泡沫夹层 

分 类 号：V421.1[航空宇航科学与技术—飞行器设计]