New diagnostic methods for laser plasma- and microwave-enhanced combustion.

Autor:	Miles RB; Department of Mechanical and Aerospace Engineering, School of Engineering and Applied Sciences, Princeton University, Olden Street, Princeton, NJ 08544, USA miles@princeton.edu., Michael JB; Department of Mechanical and Aerospace Engineering, School of Engineering and Applied Sciences, Princeton University, Olden Street, Princeton, NJ 08544, USA., Limbach CM; Department of Mechanical and Aerospace Engineering, School of Engineering and Applied Sciences, Princeton University, Olden Street, Princeton, NJ 08544, USA., McGuire SD; Department of Mechanical and Aerospace Engineering, School of Engineering and Applied Sciences, Princeton University, Olden Street, Princeton, NJ 08544, USA., Chng TL; Department of Mechanical and Aerospace Engineering, School of Engineering and Applied Sciences, Princeton University, Olden Street, Princeton, NJ 08544, USA., Edwards MR; Department of Mechanical and Aerospace Engineering, School of Engineering and Applied Sciences, Princeton University, Olden Street, Princeton, NJ 08544, USA., DeLuca NJ; Department of Mechanical and Aerospace Engineering, School of Engineering and Applied Sciences, Princeton University, Olden Street, Princeton, NJ 08544, USA., Shneider MN; Department of Mechanical and Aerospace Engineering, School of Engineering and Applied Sciences, Princeton University, Olden Street, Princeton, NJ 08544, USA., Dogariu A; Department of Mechanical and Aerospace Engineering, School of Engineering and Applied Sciences, Princeton University, Olden Street, Princeton, NJ 08544, USA.
Jazyk:	angličtina
Zdroj:	Philosophical transactions. Series A, Mathematical, physical, and engineering sciences [Philos Trans A Math Phys Eng Sci] 2015 Aug 13; Vol. 373 (2048).
DOI:	10.1098/rsta.2014.0338
Abstrakt:	The study of pulsed laser- and microwave-induced plasma interactions with atmospheric and higher pressure combusting gases requires rapid diagnostic methods that are capable of determining the mechanisms by which these interactions are taking place. New rapid diagnostics are presented here extending the capabilities of Rayleigh and Thomson scattering and resonance-enhanced multi-photon ionization (REMPI) detection and introducing femtosecond laser-induced velocity and temperature profile imaging. Spectrally filtered Rayleigh scattering provides a method for the planar imaging of temperature fields for constant pressure interactions and line imaging of velocity, temperature and density profiles. Depolarization of Rayleigh scattering provides a measure of the dissociation fraction, and multi-wavelength line imaging enables the separation of Thomson scattering from Rayleigh scattering. Radar REMPI takes advantage of high-frequency microwave scattering from the region of laser-selected species ionization to extend REMPI to atmospheric pressures and implement it as a stand-off detection method for atomic and molecular species in combusting environments. Femtosecond laser electronic excitation tagging (FLEET) generates highly excited molecular species and dissociation through the focal zone of the laser. The prompt fluorescence from excited molecular species yields temperature profiles, and the delayed fluorescence from recombining atomic fragments yields velocity profiles. (© 2015 The Author(s) Published by the Royal Society. All rights reserved.)
Databáze:	MEDLINE
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