| 引用本文: | 何青松,王广兴,冯瑞,等.充气式返回舱化学非平衡仿真分析.[J].国防科技大学学报,2024,46(3):79-87.[点击复制] |
| HE Qingsong,WANG Guangxing,FENG Rui,et al.Chemical nonequilibrium simulation analysis of inflatable reentry decelerator[J].Journal of National University of Defense Technology,2024,46(3):79-87[点击复制] |
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| 充气式返回舱化学非平衡仿真分析 |
| 何青松1,2,王广兴1,2,冯瑞1,2,董海波1,2,黄明星1,2,贾贺1,2 |
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(1. 北京空间机电研究所, 北京 100094;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 100094)
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| 摘要: |
| 采用空气五组分模型对充气式返回舱的气动特性进行了化学非平衡数值模拟研究,考察了返回舱外形变化对流场温度和压力的分布以及壁面热流密度和压强的影响,分析了流场中组分分布情况。研究结果表明,外形变化在总体上对返回舱流场特性影响较小,会使舱体壁面处的热流密度有所增加；对流场组分分布的研究发现,由于N2比O2更难解离,在整个流场中N的摩尔分数远低于O的摩尔分数；在目前的计算条件下,沿轴线和壁面的氮氧比与来流基本保持一致。仿真结果在总体上与实验结果符合较好,验证了仿真模型的可靠性。 |
| 关键词: 充气式返回舱 化学非平衡 外形变化 组分分布 数值模拟 |
| DOI：10.11887/j.cn.202403008 |
| 投稿日期：2022-02-13 |
| 基金项目:国家自然科学基金资助项目 |
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| Chemical nonequilibrium simulation analysis of inflatable reentry decelerator |
| HE Qingsong1,2, WANG Guangxing1,2, FENG Rui1,2, DONG Haibo1,2, HUANG Mingxing1,2, JIA He1,2 |
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(1. Beijing Institute of Space Mechanics & Electricity, Beijing 100094, China;2. Laboratory of Aerospace Entry, Descent and Landing Technology, China Aerospace Science and Technology Corporation, Beijing 100094, China)
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| Abstract: |
| The aerodynamic characteristics of the inflatable reentry decelerator were studied with chemical nonequilibrium numerical simulation using five-species air model. The effects of reentry decelerator′s shape deformation on distributions of flow temperature and pressure , heat flux and pressure along the wall were investigated, and the mole fractions of each species in the flow filed were presented. The modeling results show that the shape deformation of inflatable reentry decelerator has little influence on flow characteristic, and leads an increase of heat flux on the capsule surface. The study of species distribution shows that since N2 is more difficult to dissociate than O2, the mole fraction of N is much lower than the mole fraction of O in the flow filed. Under the current calculation conditions, the ration of nitrogen and oxygen along the wall and axis is almost consistent with the incoming flow. The modeling study results are in good agreement with the experiment results, which verify the reliability of the model. |
| Keywords: inflatable reentry decelerator chemical nonequilibrium shape deformation species distribution numerical simulation |
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