Simultaneous temperature and multispecies measurement in a lifted hydrogen diffusion flame

Journal Article · Mon Nov 30 23:00:00 EST 1992 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(92)90061-S· OSTI ID:7189739

Cheng, T S ^[1]; Wehrmeyer, J A ^[2]; Pitz, R W ^[3]

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1. Dept. of Mechanical Engineering, Chung Hua Polutechnic Inst., Hsin Chu 30067 (Taiwan, Province of China)
2. Dept. of Mechanical and Aerospace Engineering, Univ. of Missouri-Columbia, Columbia, MO (United States)
3. Dept. of Mechanical Engineering, Vanderbilt Univ., Nashville, TN (United States)

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

• Sponsoring Organization: NASA; National Aeronautics and Space Administration, Washington, DC (United States)
• OSTI ID: 7189739
• Journal Information: Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 91:3/4; ISSN 0010-2180; ISSN CBFMAO
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
083000* -- Hydrogen-- Combustion-- (1990-)
440500 -- Thermal Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
CONCENTRATION RATIO
DIFFUSION
ELEMENTS
EXCIMER LASERS
FLAMES
FLUORESCENCE
GAS LASERS
HYDROGEN
HYDROGEN COMPOUNDS
HYDROXYL RADICALS
JETS
LASER SPECTROSCOPY
LASERS
LUMINESCENCE
MANY-BODY PROBLEM
NITROGEN
NONMETALS
OXIDIZERS
OXYGEN
OXYGEN COMPOUNDS
RADICALS
RAMAN SPECTRA
RESOLUTION
SPATIAL RESOLUTION
SPECTRA
SPECTROSCOPY
TEMPERATURE MEASUREMENT
THREE-BODY PROBLEM
ULTRAVIOLET SPECTRA
WATER