CO concentration measurements using tunable diode laser absorption spectroscopy behind the shock waves in Martian atmosphere | |
Lin X(林鑫)1,2; Li DC2; Li F(李飞)1; Yu XL(余西龙)1,3 | |
2019 | |
会议日期 | November 11, 2018 - November 13, 2018 |
会议地点 | Changsha, China |
页码 | 10.1117/12.2524261 |
英文摘要 | Shock tube experiments are carried out to study the physical and chemical processes during a vehicle entry into the Mars atmosphere using tunable diode laser absorption spectroscopy (TDLAS) and optical emission spectroscopy (OES). CO concentration distributions are diagnosed behind a shock wave in a CO2-N2mixture with three different conditions of initial pressure and velocity. The strong shock wave is established in a shock tube driven by combustion of hydrogen and oxygen. Time-resolved spectra of the Δv = 0 sequence of the B2Σ+ →X2Σ+ electronic transition of CN have been observed through OES. A precise analysis of the CN violet spectra is performed and used to determine rotational and vibrational temperatures. Two absorption lines in the first overtone band of CO near 2.33 μm, are selected from a HITRAN simulation to calibrate laser wavelength and detect the CO concentration. Combined with these temperature results using OES, CO concentrations in the thermal equilibrium region are derived, which are 2.91 × 1017 cm-3, 7.46 × 1017 cm-3 and 1.01 × 1018 cm-3, corresponding to equilibrium temperatures equal to 7000 ± 400 K, 7400 ± 300 K, 6000 ± 300 K in the low, medium and high pressure conditions, respectively. |
会议录 | Proceedings of SPIE - The International Society for Optical Engineering |
语种 | 英语 |
ISBN号 | 9781510627581 |
WOS记录号 | WOS:000470011400009 |
内容类型 | 会议论文 |
源URL | [http://dspace.imech.ac.cn/handle/311007/80036] |
专题 | 力学研究所_高温气体动力学国家重点实验室 |
通讯作者 | Lin X(林鑫) |
作者单位 | 1.State Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing; 100190, China 2.School of Engineering Science, University of Chinese Academy of Sciences, Beijing; 100049, China 3.China Academy of Aerospace Aerodynamics, Beijing; 100074, China |
推荐引用方式 GB/T 7714 | Lin X,Li DC,Li F,et al. CO concentration measurements using tunable diode laser absorption spectroscopy behind the shock waves in Martian atmosphere[C]. 见:. Changsha, China. November 11, 2018 - November 13, 2018. |
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