Highly strained turbulent rich methane flames stabilized by hot combustion products
Journal Article
·
· Combustion and Flame
- Univ. of Cairo, Giza, A.R. (Egypt). Dept. of Mechanical Power Engineering
- Univ. of Sydney (Australia). Dept. of Mechanical and Mechatronic Engineering
- RWTH, Aachen (Germany). Inst. fuer Technische Mechanik
The structure of rich turbulent methane flames, with an equivalence ratio of 2.0, at high strain rates has been investigated based on simultaneous and instantaneous line profile measurements of the species mass fractions of CH{sub 4}, O{sub 2}, N{sub 2}, H{sub 2}O, CO{sub 2}, CO, H{sub 2} and OH radical, together with gas temperature. The flames are stabilized by the hot combustion products from a stoichiometric large pilot flame surrounding a Bunsen burner. Two flames have been investigated at overall stretch rates of 2500 s{sup {minus}1} and 4167 s{sup {minus}1}. One-dimensional combined UV Raman, Rayleigh, and laser-induced predissociation fluorescence (LIPF) technique has been applied. Measurements at different axial positions enable the flame structure to be studied at different turbulence levels. The instantaneous species mass fractions and temperature profiles are conditioned on both mixture fraction and a reaction progress variable, namely the H{sub 2}O mass fraction, allowing a proper description of the partially premixed flame structure. The components of the scalar dissipation rate of both mixture fraction and progress variable in the radial direction are also measured.
- OSTI ID:
- 675654
- Journal Information:
- Combustion and Flame, Journal Name: Combustion and Flame Journal Issue: 1-2 Vol. 116; ISSN CBFMAO; ISSN 0010-2180
- Country of Publication:
- United States
- Language:
- English
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