| 引用本文: | 李昊歌,朱恒伟,吴昌聚,等.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.[点击复制] |
| LI Haoge,ZHU Hengwei,WU Changju,et al.Indirect detection method of atmospheric density based on hypersonic reentry sphere[J].Journal of National University of Defense Technology,2017,39(4):40-47[点击复制] |
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| 采用高超声速再入圆球的大气密度间接探测方法 |
| 李昊歌, 朱恒伟, 吴昌聚, 陈伟芳 |
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(浙江大学 航空航天学院， 浙江 杭州 310027)
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| 摘要: |
| 针对现有大气密度探测方法的精度低、成本高、时空一致性差等不足，提出基于高超声速再入圆球的临近空间大气密度探测方法。根据再入运动方程沿弹道迭代计算大气密度值。仿真结果表明，该方法可测得高度90 km以下的大气密度，测量精度在6%以内。对带有偏心配重块的圆球建立沿弹道的六自由度运动分析模型，结合气动力热数值模拟确定了双天线罩布局方案；并进一步对带双天线罩的偏心圆球实现了沿弹道的热传导数值计算，提出热防护方案，证明了探测方案的可行性。提出的大气密度测量方法可以为建立临近空间高精度大气密度模型提供参考。 |
| 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 |
| DOI：10.11887/j.cn.201704007 |
| 投稿日期：2016-04-29 |
| 基金项目:国家自然科学基金资助项目（51575487，11572284） |
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| Indirect detection method of atmospheric density based on hypersonic reentry sphere |
| LI Haoge, ZHU Hengwei, WU Changju, CHEN Weifang |
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(School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China)
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| 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. |
| Keywords: hypersonic near space reentry sphere atmospheric density drag coefficient heat flux |
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