| 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); [email protected]
| |
| Source Publication | THIRD INTERNATIONAL SYMPOSIUM ON LASER INTERACTION WITH MATTER |
| 2015 | |
| Conference Name | 3rd International Symposium on Laser Interaction with Matter |
| Conference Date | NOV 02-05 2014 |
| Conference Place | Nanjing PEOPLES R CHINA |
| Abstract | 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. |
| Keyword | Optical Emission Spectroscopy Tunable Diode Laser Absorption Spectroscopy Shock Wave Temperature Concentration |
| Department | LHD高温气流激光诊断 |
| URL | 查看原文 |
| Indexed By | CPCI-S ; EI |
| Language | 英语 |
| Document Type | 会议论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/55368 |
| Collection | 高温气体动力学国家重点实验室 |
| Corresponding Author | [email protected] |
| Recommended Citation 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. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Cfp2014-015.pdf（1140KB） | 会议论文 | 开放获取 | CC BY-NC-SA | View Download | ||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment