Modeling of Rich Premixed C2H4/O2/Ar and C2H4/Dimethoxymethane/O2/Ar Flames
(2008) Sixth International Seminar on Flame Structure — Location: Brussels, Belgium (14.September.2008)
Files
No attached file found for this publication.
Details
- Authors
- Abstract
- Two rich premixed ethylene/oxygen/argon and ethylene/dimethoxymethane/oxygen/argon flat flames burning at 50 mbar were investigated experimentally by using molecular beam mass spectrometry to study the effect of methylal (dimethoxymethane) addition on species concentration profiles (C. Renard, P.J. Van Tiggelen and J. Vandooren, Proc. Combust. Inst., 29 (2002) 1277–1284). The replacement of 5.7% C2H4 by 4.3% C3H8O2, keeping the equivalence ratio equal to 2.50, is responsible for a decrease of the maximum mole fractions of most of the detected intermediate species. If this phenomenon is barely noticeable for C2 to C4 intermediates, it becomes more efficient for C5 to C10 species. Previously, a reaction mechanism has been validated against a premixed rich C2H4/O2/Ar flame (φ = 2.50) which describes in detail the formation of soot precursors and more precisely the main pathways involving benzene (V. Dias, C. Renard, P.J. Van Tiggelen and J. Vandooren, European Combustion Meeting, Orléans, France, p.221, 2003).The aim of this work is to extend this original model by building a sub-mechanism taking into account the formation and the consumption of oxygenated species involved in dimethoxymethane combustion. The new mechanism contains 474 elementary reactions and involves 90 chemical species in order to simulate both ethylene flames with and without methylal addition. The model leads to a good simulation for all species detected in these flames, and underlines the effect of methylal addition on species concentration profiles.According to this mechanism, the two main degradation pathways of methylal (CH3OCH2OCH3) in C2H4/methylal/oxygen/argon flame are: 1) CH3OCH2(´3´)OCH3 → CH3OCH2OCH2 → CH3OCH2 → CH2O 2) CH3OCH2OCH3 → CH3OCHOCH3 → CH3OCHO → CH3OCO → CH3O → CH3OH → CH2OH → CH2O
- Affiliations
Citations
Dias, V., Renard, C., & Vandooren, J. (2008). Modeling of Rich Premixed C2H4/O2/Ar and C2H4/Dimethoxymethane/O2/Ar Flames. Sixth International Seminar on Flame Structure, Brussels, Belgium. https://hdl.handle.net/2078.5/231081