充气式返回舱迎风面真实气体效应  

Real gas effect of inflatable reentry decelerator on windward side

作　　者：何青松 孙素蓉[3] HE Qingsong;SUN Surong(Beijing Institute of Space Mechanics&Electricity,Beijing 100194,China;Laboratory of Aerospace Entry,Descent and Landing Technology,China Aerospace Science and Technology Corporation,Beijing 100084,China;School of Astronautics,Beihang University,Beijing 100191,China)

机构地区：[1]北京空间机电研究所,北京100194 [2]中国航天科技集团有限公司航天进入、减速与着陆技术实验室,北京100084 [3]北京航空航天大学宇航学院,北京100191

出　　处：《北京航空航天大学学报》2025年第3期816-823,共8页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家自然科学基金(12005014,12005010)。

摘　　要：分别采用空气9组分化学非平衡模型和基于理想气体假设模型对充气式返回舱再入流场进行数值模拟,考察2种方法计算结果的差异,研究真实气体效应的表现形式,探究充气式返回舱真实气体效应与刚性返回舱真实气体效应存在差异的原因。研究结果表明:相比于理想气体假设,真实气体效应使激波位置更靠近壁面,激波后空气温度降低,壁面热流密度下降;在飞行高度为83 km处,激波后气体比热比高于1.4,空气发生解离反应,而在飞行高度为73 km处真实气体效应的作用较弱,激波后空气的比热比维持在1.4,空气仍以分子的形式存在;导致充气式返回舱与刚性返回舱在相同高度范围真实气体强弱差异的主要原因是充气式返回舱的阻重比相较于刚性返回舱更大,进入大气后速度下降更快,在相同高度速度更低。In this paper,a 9-component chemical non-equilibrium model and a perfect gas model were used to study the reentry flow of an inflatable reentry decelerator through numerical simulation.The differences in the calculation results of the two models were investigated.The manifestation of the real gas effect was studied,and the reason for the difference between the real gas effect of inflatable reentry decelerator and that of rigid capsule was explored.The results show that compared to the perfect gas hypothesis,the shock wave position is closer to the wall in the real gas effect.After the shock wave,the air temperature decreases,and the wall heat flux decreases.At 83 km,the specific heat ratio of the gas after the shock wave is higher than 1.4,and the air undergoes a dissociation reaction.At 73 km,the real gas effect is very weak,and the specific heat ratio of the gas after the shock wave remains at 1.4.The air still exists in the form of molecules.The main reason for the difference in real gas strength between inflatable reentry decelerator and rigid capsule in the same altitude range is that the inflatable reentry decelerator has a larger resistance-weight ratio than the rigid capsule.Its speed drops faster after entering the atmosphere,and its speed is lower at the same altitude.

关 键 词：充气式返回舱 真实气体效应 理想气体 比热比 数值模拟 

分 类 号：V445.4[航空宇航科学与技术—飞行器设计]