A Compact Tunable Diode Laser Absorption Spectrometer to Monitor CO2 at 2.7 μm Wavelength in Hypersonic Flows

被引：18
|
作者：
Vallon, Raphaeel [1 ]
Soutade, Jacques [1 ]
Verant, Jean-Luc [1 ]
Meyers, Jason [2 ]
Paris, Sebastien [2 ]
Mohamed, Ajmal [1 ]
机构：
[1] Off Natl Etud & Rech Aerosp, French Aerosp Lab, FR-92322 Chatillon, France
[2] Von Karman Inst, B-1640 Rhode St Genese, Belgium
来源：
SENSORS | 2010年 / 10卷 / 06期
关键词：
gas sensor; tunable diode laser absorption spectroscopy; distributed feedback (DFB); laser velocimetry; CO2; monitoring; hypersonic flow; Mars atmosphere; TEMPERATURE; SPECTROSCOPY;
D O I：
10.3390/s100606081
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
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.
引用
收藏
页码：6081 / 6091
页数：11
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