NO formation in high pressure premixed flames: Experimental results and validation of a new revised reaction mechanism

FUEL

卷:260

Article

de Persis, Stephanie^1,2  Pillier, Laure³  Idir, Mahmoud¹  Molet, Julien^1,2  Lamoureux, Nathalie³  Desgroux, Pascale³ 

[1] ICARE, Inst Combust Aerotherm Reactivite Environm, UPR3021, CNRS, 1C Av Rech Sci, F-45071 Orleans, France

[2] Univ Orleans, Ave Parc Floral, F-45067 Orleans, France

[3] Univ Lille, CNRS, UMR8522, PC2A,PhysicoChim Proc Combust & Atmosphere, F-59000 Lille, France

关键词: NOx formation;    High pressure flames;    Laser Induced Fluorescence;    Methane combustion;    Kinetic analysis;   

DOI  :  10.1016/j.fuel.2019.116331

来源: Elsevier

【 摘 要 】

This paper presents an experimental and modelling study of NO formation in high pressure premixed flames. Experiments were performed in a high-pressure counterflow burner in which laminar premixed CH4/air flames were stabilised at equivalence ratios of E.R = 0.7, 1 and 1.2 and for pressures varying from 0.1 to 0.7 MPa. We report quantitative NO mole fraction profiles measured by Laser Induced Fluorescence. The effects of pressure and equivalence ratio on NO formation are discussed. These results are compared to the simulations using two reaction mechanisms: NOmecha2.0 associated to a detailed mechanism for methane oxidation: GDFkin (R) 3.0 and the mechanism from Klippenstein a al., which is the most recent high-pressure NOx formation mechanism available in the literature. In general, both mechanisms are able to predict NO correctly in lean and stoichio-metric high pressure flames; however, in rich flames, GDFkin (R) 3.0_NOmecha2.0 gives the best predictions. The performances of these mechanisms are also tested on NO measurements in high-pressure flames from the literature. A kinetic analysis is then presented to identify the main pathways that lead to the formation and consumption of NO and highlight the differences between the two mechanisms, as well as a sensitivity analysis to identify important reactions that influence the formation/consumption of NO in our high pressure flames.

【 授权许可】

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