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Measurements of KrF laser-induced O2 fluorescence in high-temperature atmospheric airConditions for obtaining laser-induced O2 fluorescence using a tunable KrF laser has been determined theoretically and experimentally. With this laser source, O2 rotational temperature measurement is possible even in the absence of vibrational equilibrium. Temperature measurement using a two-line excitation scheme has been demonstrated in a high-temperature atmospheric-air furnace. A measurement uncertainty of 10.7 percent for the temperature range 1325-1725 K was realized. At atmospheric pressure, O2 LIF measurements are possible for air temperatures above 1250 K. Interference from OH fluorescence in reacting flows can be avoided by the proper selection of O2 transitions. Depletion of the ground state population by the incident laser is negligible for intensities below 7.5 x 10 to the 6th W/sq cm/per cm.
Document ID
19930036161
Document Type
Conference Paper
Authors
Grinstead, Jay H. (NASA Langley Research Center Hampton, VA, United States)
Laufer, Gabriel (NASA Langley Research Center Hampton, VA, United States)
Mcdaniel, James C., Jr. (Virginia Univ. Charlottesville, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1993
Subject Category
INSTRUMENTATION AND PHOTOGRAPHY
Report/Patent Number
AIAA PAPER 93-0045
Meeting Information
AIAA, Aerospace Sciences Meeting and Exhibit(Reno, NV)
Funding Number(s)
CONTRACT_GRANT: NAG1-795
Distribution Limits
Public
Copyright
Other