Simultaneous temperature and multispecies measurement in a lifted hydrogen diffusion flame

摘要: This paper reports that ultraviolet (UV) spontaneous vibrational Raman scattering and laser-induced predissociative fluorescence (LIPF) techniques are combined applied to a lifted hydrogen jet diffusion flame. Simultaneous, temporally spatially resolved point measurements of temperature, major species concentrations (H[sub 2], O[sub 2] N[sub H[sub 2]O), absolute hydroxyl radical concentration (OH) obtained with single excimer laser for the first time. For OH measurements, use LIPF makes quenching corrections unnecessary. Results demonstrate fuel oxidizer in rich, premixed, unignited condition center core flame base. In zone, combustion occurs an intermittent annular turbulent brush strong finite-rate chemistry effects result nonequilibrium values species, radicals. Downstream slow three-body recombination partial equilibrium, superequilibrium, temperatures subequilibrium. Far downstream flame, equilibrium radical, found.