The effect of chemical structure of dimethyl ether (DME) on NOx formation in nonpremixed counterflow flames

• Published in: Journal of mechanical science and technology 2009, 23(7), , pp.1885-1892
• Main Authors: Kim, Tae-Hyun, Kim, Jong-Min, Hwang, Cheol-Hong, Kum, Sung-Min, Lee, Chang-Eon
• Format: Article
• Language: English
• Subjects: Applied sciences; Atmospheric pollution; Bonding; Combustion of gaseous fuels; Combustion. Flame; Control; Counterflow; Dimethyl; Dimethyl ether; Dynamical Systems; Energy; Energy. Thermal use of fuels; Engineering; Exact sciences and technology; Flame structure; Fluid dynamics; Fundamental areas of phenomenology (including applications); General theory; Industrial and Production Engineering; Mathematical analysis; Mechanical Engineering; Miscellaneous; Nonpremixed flames; Physics; Pollution; Pollution sources. Measurement results; Premixed flames; Studies; Theoretical studies. Data and constants. Metering; Vibration; 기계공학
• ISSN: 1738-494X; 1976-3824
• DOI: 10.1007/s12206-009-0619-6

To clarify the effect of chemical structure of Dimethyl ether(DME) on NOx formation in nonpremixed counterflow flame, DME flame was investigated numerically to compare the flame structures and NOx emissions with C 2 H 6 and Mixed-fuel. Numerically, the governing equations were solved using the Oppdif code coupled with CHEMKIN package, and DME flames were calculated by Kaiser’s mechanism, while the C 2 H 6 flames and Mixed-fuel flames were calculated by the C 3 mechanism. These mechanisms were combined with the modified Miller-Bowman mechanism for the analysis of NOx. Numerical results of nonpremixed counterflow flames show that the EI NO of DME nonpremixed flame is low as much as 50 % of the C 2 H 6 nonpremixed flame. The cause of EI NO reduction is attributed mainly to the characteristics of partial premixed flame due to the existence of oxygen atom in DME and partly to the O-C bond in DME, instead of C-C bond in hydrocarbon fuels.