【作者】

Heikki Kahila

【摘要】

该论文已在赫尔辛基举行的第28届CIMAC大会上发表，论文的版权归CIMAC所有。Large-eddy simulations (LES) of a chemically reacting "Spray A" - target case, defined by the Engine Combustion Network (ECN), are carried out with three injection pressures: 50, 100 and 150 MPa. The flamelet generated manifold (FGM) is applied as the combustion model in the present study. The simulation results in non-reacting conditions indicate relatively good agreement with the experimental data in terms of liquid and vapour penetrations and radial mixture fraction profiles. Subsequently, the simulation results in reacting conditions indicate the inverse relationship of the ignition delay time (IDT) to injection pressure with a slight underprediction. The experimental trend in flame lift-off lengths (FLOLs) is better captured for all cases with a slight overprediction growing with the injection pressure. Complementary analysis of formaldehyde and hydroxide formation is shown and the spatio-temporal features of the ignition and flame development are discussed. Furthermore the length of the confined formaldehyde region, i.e. 'cool flame' is discussed.

【会议名称】

第28届CIMAC会议

【会议地点】

芬兰 赫尔辛基

【下载次数】

2

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