Temperature measurement by two-line laser-saturated OH fluorescence in flames. [p]

Journal Article · Fri Oct 15 04:00:00 EDT 1982 · Appl. Opt.; (United States)

DOI:https://doi.org/10.1364/AO.21.003729· OSTI ID:5580161

Lucht, R P; Laurendeau, N M; Sweeney, D W

A technique is proposed and demonstrated for measuring combustion temperatures using two-line laser-saturated fluorescence. The rotational temperature of OH is determined by saturating two different rotational transitions in the (0,0) and of the A/sup 2/summation/sup +/-X /sup 2/product electronic system and detecting fluorescence emission which originates from the laser-pumped upper rotational levels. Temperature is calculated from the ratio of the fluorescence intensities for the two different excitation-emission pairs. The method is demonstrated by measuring temperature profiles in subatmospheric H/sub 2//O/sub 2//Ar flat flames. Temperatures measured by two-line saturated fluorescence are compared with temperatures measured by coated thermocouples and OH absorption and with predictions from an elementary chemical kinetics code. The temperatures measured by the two-line fluorescence technique are accurate to 3--5% and exhibit low random error.

• Research Organization: The authors are with Purdue University, School of Mechanical Engineering, West Lafayette, Indiana 47907.
• DOE Contract Number: AC02-78ER04939
• OSTI ID: 5580161
• Journal Information: Appl. Opt.; (United States), Journal Name: Appl. Opt.; (United States) Vol. 21:20; ISSN APOPA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
DATA
DIRECTED-ENERGY WEAPONS
ELECTROMAGNETIC RADIATION
EXPERIMENTAL DATA
FLAMES
FLUORESCENCE
HYDROXYL RADICALS
INFORMATION
LASER RADIATION
LASER WEAPONS
LUMINESCENCE
NUMERICAL DATA
RADIATIONS
RADICALS
TEMPERATURE MEASUREMENT
WEAPONS