Combustion D'Un Melange Methane-Air Heterogene Globalement Pauvre Paperback

Salvador Malheiro

The work presented in this thesis concerns the experimental study of the combustion of a globally poor heterogeneous mixture, after direct injection of methane. An experimental approach out of motor in static chamber with constant volume then in the Rapid Compression Machine was chosen. This study aims, on the one hand, to better understand the physical phenomena present in this type of combustion in order to significantly reduce the overall richness of the mixture, and on the other hand to evaluate the efficiency of combustion in the perspective of a future engine application. The study of the misfires allowed to validate in an innovative way the measurements of wealth fields obtained by PLIF. It has been experimentally proven that Ignition of mixtures of overall richness below the flammability limit of a homogeneous mixture is possible. The control of the swirl flow and the phasing between the injection and the ignition made it possible to ignite a mixture of overall richness of 0.12 (mass of methane eight times weaker than the stoichiometric case) with a pressure efficiency. 90%.

9786131558153

French

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