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Experimental and Numerical Study of Carbon-Dioxide Dissociation for Mars Atmospheric Entry
Lin X(林鑫); Chen LZ; Li JP(李进平); Li F(李飞); Yu XL(余西龙)
2018-04-01
发表期刊JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER
卷号32期号:2页码:503-513
ISSN0887-8722
摘要

The mechanism of CO2 dissociation during entry in the Mars atmosphere is experimentally investigated. A hydrogen-oxygen combustion-driven shock tube is used to simulate physical and chemical conditions in a CO2-N-2 mixture. Two shock velocity/initial pressure conditions are studied: 7.09 +/- 0.05 km /s at 100 Pa (called the low-pressure condition) and 5.68 +/- 0.07 km /s at 300 Pa (called the high-pressure condition). The temperature behind the shock wave is obtained by analyzing the high-temporal-resolution and high-spatial-resolution experimental spectra of the CN violet (B-2 Sigma(+ )-> X-2 Sigma(+), Delta v = 0) system. The CO number density is derived using a tunable diode laser absorption spectroscopy system based on CO absorption near 2.33 mu m. Moreover, a numerical code is developed to reproduce the experimental results (temperatures and species densities). The kinetic code in this work is based on Park's two-temperature model. Comparisons between experiments and calculations are presented. Such a relatively simple two-temperature model fails to accurately describe the nonequilibrium temperature and CO number density but is suitable for equilibrium temperature predictions.

DOI10.2514/1.T5152
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收录类别SCI ; EI
语种英语
WOS记录号WOS:000428347000021
关键词[WOS]Strong Shock-wave ; Nonequilibrium Radiation ; Temperature-measurements ; Emission-spectroscopy ; Cn Radiation ; Simulations ; Mixtures ; Plasmas ; System ; Tube
WOS研究方向Thermodynamics ; Engineering, Mechanical
WOS类目Thermodynamics ; Engineering
项目资助者National Natural Science Foundation of China
论文分区Q3
力学所作者排名1
引用统计
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77814
专题高温气体动力学国家重点实验室
通讯作者Yu XL(余西龙)
推荐引用方式
GB/T 7714
Lin X,Chen LZ,Li JP,et al. Experimental and Numerical Study of Carbon-Dioxide Dissociation for Mars Atmospheric Entry[J]. JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER,2018,32(2):503-513.
APA Lin X,Chen LZ,Li JP,Li F,&Yu XL.(2018).Experimental and Numerical Study of Carbon-Dioxide Dissociation for Mars Atmospheric Entry.JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER,32(2),503-513.
MLA Lin X,et al."Experimental and Numerical Study of Carbon-Dioxide Dissociation for Mars Atmospheric Entry".JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER 32.2(2018):503-513.
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