The Effect of Selective Energy Deposition on the Homogeneous Ignition of Methane and its Implication for Flame Initiation and Combustion Enhancement
作者:
THOMPSONM. SLOANE,
期刊:
Combustion Science and Technology
(Taylor Available online 1985)
卷期:
Volume 42,
issue 3-4
页码: 131-144
ISSN:0010-2202
年代: 1985
DOI:10.1080/00102208508960373
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
This paper describes a computational study of the ignition of methane mixtures by selective ignition energy deposition. In this work the ignition energy was added as an initial condition to the combustible mixture in a specific manner, either in the form of heat or a combination of heat and selected, highly reactive atoms or molecules. The resulting induction time for the ignition of homogeneous combustion was found to decrease with increasing fraction of ignition energy deposited into dissociation for the same total ignition energy at a given equivalence ratio. In addition to these calculations performed at constant energy, other calculations were performed where equal amounts of the radicals H, O, and OH were added to assess the effect of direct addition of these radicals on the induction time. Oxygen atoms yielded the shortest induction time in the stoichiometric case and hydrogen atoms yielded the shortest induction time in the lean case. Hydroxyl radicals yielded by far the longest induction time in both cases
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