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Laser-based measurements of OH in high pressure CH4/air flamesNarrow-linewidth laser absorption measurements are reported from which mole fraction and temperature of OH are determined in high-pressure (1-10 atm), lean CH4/air flames. These measurements were made in a new high pressure combustion facility which incorporates a traversable flat flame burner, providing spatially and temporally uniform combustion gases at pressures up to 10 am. A commercially avialable CW ring dye laser was used with an intracavity doubling crystal to provide near-UV single mode output at approximately 306 nm. The UV beam was rapidly scanned over 120 GHz (0.1 sec scan duration) to resolve the absorption lineshape of the A-X (0,0) R1(7)/R1(11) doublet of the OH radical. From the doublet's absorption lineshape, the temperature was determined; and from peak absorption, Beer's Law was employed to find the mole fraction of OH. These data were obtained as a function of height above the flame at various pressures.
Document ID
19910058922
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Battles, B. E.
(Stanford Univ. CA, United States)
Hanson, R. K.
(Stanford University CA, United States)
Date Acquired
August 15, 2013
Publication Date
June 1, 1991
Subject Category
Inorganic And Physical Chemistry
Report/Patent Number
AIAA PAPER 91-1494
Accession Number
91A43545
Distribution Limits
Public
Copyright
Other

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