The Dynamics of Premixed Flame Surfaces

预混合火焰表面的动力学

• 批准号: 9521022
• 负责人: Moshe Matalon
• 金额: $ 18.46万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-08-01 至 1999-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9521022&HistoricalAwards=false
• 关键词: Dynamics; Premixed; Flame; Surfaces

Abstract Matalon CTS-9521022 The proposed work is essentially an extension of research currently being carried out by the PI in the area of flame dynamics. The primary objective of the proposed effort is to re-examine, extend and generalize a model that the PI has developed for the flame speed dependence in terms of curvature, strain and non-steady effects in the thin premixed flamelet regime. Specific topics will include the investigation of the following: (1) time dependent flame structure in which unsteady perturbation and large amplitude solutions will be considered, (2) propagation in near-stoichiometric mixtures, (3) effects of nonuniform mixtures on the unburned gas, and (4) effects of interactions of a premixed flame with surfaces and in confined environments. The general methodology will involve the use of large activation energy asymptotics based on one-step global kinetics, with the addition of allowing for density changes from unburned to burned gases.

摘要 Matalon CTS-9521022 所提出的工作本质上是 PI 目前在火焰动力学领域正在进行的研究的延伸。 这项工作的主要目标是重新检查、扩展和概括 PI 开发的模型，该模型针对薄预混小火焰区域中曲率、应变和非稳态效应的火焰速度依赖性。 具体主题将包括以下方面的研究：（1）时间相关的火焰结构，其中将考虑不稳定扰动和大幅度解决方案，（2）近化学计量混合物中的传播，（3）非均匀混合物对未燃烧气体的影响，以及（4）预混合火焰与表面和受限环境中相互作用的影响。 一般方法将涉及使用基于一步全局动力学的大活化能渐近法，并考虑到从未燃烧气体到已燃烧气体的密度变化。