国防科技大学学报2017，Vol.39Issue(4)：40-47,8.DOI:10.11887/j.cn.201704007
采用高超声速再入圆球的大气密度间接探测方法
Indirect detection method of atmospheric density based on hypersonic reentry sphere
摘要
Abstract
A near space atmospheric density detection method based on hypersonic reentry sphere was proposed with the aim of overcoming the shortages of current detection methods, such as the low accuracy, the high cost and the weak time-space conformity.The measurement error was analyzed according to the kinematic equation of reentry sphere.The results show that the atmospheric density below the height of 90 km can be detected with the accuracy level below 6%.The antenna placement scheme was determined by analyzing the 6-DOF (degree of freedom) motion model of the sphere with eccentric balancing weight and combining with the numerical simulation of aerodynamic heat.Numerical calculation of heat conduction along ballistic trajectory for the eccentric sphere with double radome was achieved and the thermal protection scheme was performed eventually to demonstrate the feasibility of this detection scheme.The proposed detection method of atmospheric density can provide a meaningful reference to the construction of high-accuracy near-space atmospheric density.关键词
高超声速/临近空间/再入圆球/大气密度/阻力系数/热流密度Key words
hypersonic/near space/reentry sphere/atmospheric density/drag coefficient/heat flux分类
航空航天引用本文复制引用
李昊歌,朱恒伟,吴昌聚,陈伟芳..采用高超声速再入圆球的大气密度间接探测方法[J].国防科技大学学报,2017,39(4):40-47,8.基金项目
国家自然科学基金资助项目(51575487,11572284) （51575487,11572284）
