Measurements of CO concentration distribution for Mars atmospheric entry by combining OES and TDLAS

	Measurements of CO concentration distribution for Mars atmospheric entry by combining OES and TDLAS
	Lin X(林鑫); Chen LZ; Ou DB; Li F(李飞); Yu XL(余西龙); oudongbin@sina.com
会议录名称	THIRD INTERNATIONAL SYMPOSIUM ON LASER INTERACTION WITH MATTER
	2015
会议名称	3rd International Symposium on Laser Interaction with Matter
会议日期	NOV 02-05 2014
会议地点	Nanjing PEOPLES R CHINA
摘要	Shock tube experiments are carried out to study the physical and chemical processes during a vehicle entry into the Mars atmosphere using optical emission spectroscopy and tunable diode laser absorption spectroscopy . Gas temperature and CO concentration distribution are diagnosed behind a shock wave in a CO2-N-2 mixture with two 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 Delta v = 0 sequence of the B-2 Sigma-> X-2 Sigma 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 mu m 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 x 10 cm and 1.01 x 10 cm corresponding to equilibrium temperatures equal to 7000 +/- 400 K and 6000 +/- 300 K in low and high pressure conditions respectively.
关键词	Optical Emission Spectroscopy Tunable Diode Laser Absorption Spectroscopy Shock Wave Temperature Concentration
课题组名称	LHD高温气流激光诊断
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收录类别	CPCI-S ; EI
语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/55368
专题	高温气体动力学国家重点实验室
通讯作者	oudongbin@sina.com
推荐引用方式 GB/T 7714	Lin X,Chen LZ,Ou DB,et al. Measurements of CO concentration distribution for Mars atmospheric entry by combining OES and TDLAS[C]THIRD INTERNATIONAL SYMPOSIUM ON LASER INTERACTION WITH MATTER,2015.

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