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24 May 1993 Rayleigh and predissociative fluorescence imaging of total and quantum state-specific densities from a combustion bomb using tunable excimer laser light
Gyungsoo Kim, Hongjie An, Erhard W. Rothe, Lynne M. Hitchcock, Youngwei Gu, Gene P. Reck
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Proceedings Volume 1862, Laser Applications in Combustion and Combustion Diagnostics; (1993) https://doi.org/10.1117/12.145691
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States
Abstract
Rayleigh Scattering (RS) and Planar Laser Induced Predissociative Fluorescence (PLIPF) are used to obtain 2-D images of total and of state specific [i.e., of definite rotational levels of OH (v' equals 0) and O2 (v' equals 2, 3, 6, or 7)] densities of the burned and unburned zones inside a combustion bomb. A tunable excimer laser, operated in either the 193 nm- or 248 nm-range, is used. Our bomb is about the size of an automobile engine cylinder. As each volume element of the fuel mixture burns, it forms high-T products with large specific volumes. Because the thermodynamics are well known, the bomb may serve as a reference device for diagnostics for high temperature species via pulsed-laser methods. The total densities and the mole fractions of the various constituents can be accurately calculated. Work has been done with various compositions of hydrogen-air and propane-air fuel mixtures.
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Gyungsoo Kim, Hongjie An, Erhard W. Rothe, Lynne M. Hitchcock, Youngwei Gu, and Gene P. Reck "Rayleigh and predissociative fluorescence imaging of total and quantum state-specific densities from a combustion bomb using tunable excimer laser light", Proc. SPIE 1862, Laser Applications in Combustion and Combustion Diagnostics, (24 May 1993); https://doi.org/10.1117/12.145691
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KEYWORDS
Combustion
Luminescence
Laser scattering
Excimer lasers
Remote sensing
Light scattering
Optical filters
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