Chemical kinetic effects in nonpremixed flames of H[sub 2]/CO[sub 2] fuel

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

DOI:https://doi.org/10.1016/0010-2180(92)90059-X· OSTI ID:6915400

Masri, A R ^[1]; Dibble, R W ^[2]; Barlow, R S ^[3]

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1. Sydney Univ., NSW (Australia). Dept. of Mechanical Engineering
2. California Univ., Berkeley, CA (United States). Dept. of Mechanical Engineering
3. Sandia National Labs., Livermore, CA (United States). Combustion Research Facility

Finite rate chemical kinetic effects are investigated in diffusion flames of H[sub 2]/CO[sub 2] fuel. The CO[sub 2] diluent is not totally inert since a high temperature some of it will react to give CO. In this paper calculations of laminar flames and measurements in turbulent flames are presented. The calculations are performed, using a detailed chemical kinetic mechanism with 13 species and 34 chemical reactions. The structure of laminar counterflow diffusion flames with a range of stretch rates are calculated. Using the joint Raman-Rayleigh-LIF technique, simultaneous space- and time-resolved measurements of temperature and the Raman scattering from CO, CO[sub 2] H[sub 2]. H[sub 2]O, O[sub 2], and N[sub 2], as well as laser-induced fluorescence (LIF) from OH have been made in turbulent nonpremixed flames of H[sub 2]/CO[sub 2]. As these flames are pilot-stabilized they blow off, at high enough jet velocities, in a region down stream of the pilot where turbulent mixing rates are high and the finite rate chemistry effects are significant. It is found that for laminar flames with low stretch rates, the peak calculated temperatures exceed the equilibrium temperature and the peak temperatures measured in turbulent flames.

• OSTI ID: 6915400
• 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

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
BLOWOFF
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
COHERENT SCATTERING
DIFFUSION
ELEMENTS
ELONGATION
EQUILIBRIUM
FLAMES
FLUID FLOW
FLUORESCENCE
HYDROGEN
HYDROXYL RADICALS
KINETICS
LAMINAR FLOW
LASER SPECTROSCOPY
LUMINESCENCE
NONMETALS
OXIDES
OXYGEN COMPOUNDS
RADICALS
RAMAN EFFECT
RAYLEIGH SCATTERING
REACTION KINETICS
RESOLUTION
SCATTERING
SPATIAL RESOLUTION
SPECTROSCOPY
TIME RESOLUTION
TIMING PROPERTIES
TURBULENT FLOW
VELOCITY