Open AccessTemperature measurements based on tunable diode laser absorption spectroscopy
Author(s) -
Zhenyu Xu,
Wenqing Liu,
Jianguo Liu,
Zihe Li,
Yao Lu,
Jun Ruan,
Jiuying Chen,
Han Li,
Shuai Yuan,
Hong Geng,
Ruifeng Kan
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.234204
Subject(s) - hitran , materials science , combustor , absorption spectroscopy , tunable diode laser absorption spectroscopy , absorption (acoustics) , temperature measurement , line (geometry) , spectroscopy , optics , spectral line , analytical chemistry (journal) , combustion , tunable laser , optoelectronics , chemistry , physics , wavelength , quantum mechanics , composite material , organic chemistry , geometry , mathematics , astronomy , chromatography
The thermometry based on absorption spectroscopy and developing of a temperature sensor is introduced, in which temperature is retrieved by measuring line strength ratio between a pair of absorptions of water vapor near 1.4 μm. The temperature sensor is first calibrated on a tubular furnace and then used to verify measurement results with the heating tube whose both sides are open, an average fluctuation of about 50 K is obtained at each temperature setpoint. Some new absorption lines of H2O near one absorption (centered at 7153.7 cm -1) of the selected line pair are observed during demonstration measurements for CH4/air flat flame burner. These absorption lines overlapping with 7153.7 cm-1, are not listed in HITRAN08 database while HITEMP data give absorption information about these wave number positions. But line center of the other absorption (centered at 7154.354 cm-1) in HITEMP seems different from our measurement and HITRAN database. A combination of our calibrated results from tubular furnace and line parameters of new features from HITEMP is chosen and some results measured at different equivalence ratios on the burner are shown here.