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http://dx.doi.org/10.3795/KSME-B.2002.26.7.1039

Characteristics of Preheated Air Combustion in a Laminar Premixed Flame  

Lee, Jong-Ho (부산대학교 대학원 기계공학과)
Lee, Seung-Young (부산대학교 대학원 기계공학과)
Hahn, Jae-Won (한국표준과학연구원, 레이저계측그룹)
Chang, Young-June (부산대학교 기계공학부)
Jeon, Chung-Hwan (부산대학교 기계공학부, 기계기술연구소)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.26, no.7, 2002 , pp. 1039-1046 More about this Journal
Abstract
Co-flow axisymmetric laminar premixed flame of methane was used to study the influence of air temperature and $N_2$ addition on the flame structure, temperature field and emission characteristics. OH 2-D images and temperatures along the centerline were measured experimentally by PLIF and CARS techniques respectively to observe the influences of dilution and thermal effects of $N_2$ in the gas mixture. Also, the concentration of NOx was measured at each condition by gas analyser to see the suppression effect of N2 addition on NOx emissions. It was found that OH concentrations distribute widely as air temperature goes higher, while the effect of $N_2$ addition is not significant. But $N_2$ addition highly contributes to the flame front and NOx emissions which was argued to be due to the reduction of flame temperature. In accordance with experimental study, numerical simulation using CHEMKlN code was carried out to compare the temperature results with those acquired by CARS measurement, and we could find that there is good agreement between those results.
Keywords
Preheated Air Combustion; OH Radical; Dilutio; NOx; PLlF; CARS;
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