Sensors | |
A Compact Tunable Diode Laser Absorption Spectrometer to Monitor CO2 at 2.7 μm Wavelength in Hypersonic Flows | |
Raph๎l Vallon1  Jacques Soutadé1  Jean-Luc Vérant1  Jason Meyers2  Sstien Paris2  | |
[1] The French Aerospace Lab, ONERA, BP72-29 avenue de la Division Leclerc, FR-92322 Chatillon cedex, France; E-Mails:;Von Karman Institute, 1640 Rhode-St-Génèse, Belgium; E-Mails: | |
关键词: gas sensor; tunable diode laser absorption spectroscopy; distributed feedback (DFB); laser velocimetry; CO2 monitoring; hypersonic flow; Mars atmosphere; | |
DOI : 10.3390/s100606081 | |
来源: mdpi | |
【 摘 要 】
Since the beginning of the Mars planet exploration, the characterization of carbon dioxide hypersonic flows to simulate a spaceship’s Mars atmosphere entry conditions has been an important issue. We have developed a Tunable Diode Laser Absorption Spectrometer with a new room-temperature operating antimony-based distributed feedback laser (DFB) diode laser to characterize the velocity, the temperature and the density of such flows. This instrument has been tested during two measurement campaigns in a free piston tunnel cold hypersonic facility and in a high enthalpy arc jet wind tunnel. These tests also demonstrate the feasibility of mid-infrared fiber optics coupling of the spectrometer to a wind tunnel for integrated or local flow characterization with an optical probe placed in the flow.
【 授权许可】
CC BY
© 2010 by the authors; licensee MDPI, Basel, Switzerland.
【 预 览 】
Files | Size | Format | View |
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RO202003190053348ZK.pdf | 968KB | download |