Laser Diagnostic Imaging of Energetically Enhanced Flames Using Direct Microwave Plasma Coupling

Author

Rao, Xing ; Hammack, Stephen ; Carter, Campbell ; Lee, Tonghun

Author_Institution

Rare Isotope Beams, Michigan State Univ., East Lansing, MI, USA

Volume

39

Issue

11

fYear

2011

Firstpage

2354

Lastpage

2355

Abstract

Quantitative images of temperature and hydroxyl (OH) concentrations are presented in plasma-enhanced flames, where a nonthermal microwave plasma discharge is coupled directly with the reaction zone of the flame. The plasma jet is generated through a novel microwave (2.45 GHz) waveguide based a coaxial reactor system. Planar laser-induced fluorescence is used to generate the OH fields, and planar Rayleigh scattering thermometry is used for the temperature. Plasma-enhanced flames present new possibilities for ignition and flame holding under harsh operating conditions, including stabilization of combustion in hypersonic flame conditions.

Keywords

Rayleigh scattering; combustion; flames; high-frequency discharges; plasma chemistry; plasma diagnostics; plasma temperature; coaxial reactor system; combustion stabilization analysis; direct microwave plasma coupling; energetically enhanced flame analysis; flame reaction zone; frequency 2.45 GHz; harsh operating condition; hydroxyl concentration; hypersonic flame condition; laser diagnostic imaging; microwave waveguide; nonthermal microwave plasma discharge; planar Rayleigh scattering thermometry; planar laser-induced fluorescence; plasma jet; plasma temperature; plasma-enhanced flames; Combustion; Discharges; Masers; Microwave imaging; Plasma temperature; Rayleigh scattering; Laser-induced fluorescence; Rayleigh scattering; nonequilibrium microwave plasma; plasma-enhanced combustion;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

Conference_Location

5/19/2011 12:00:00 AM

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2011.2148180

Filename

5771602