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拟议的工作实质上是PI目前在火焰动力学领域进行的研究的延伸。这项工作的主要目的是重新检验、推广和推广PI建立的一个模型，该模型用于研究薄预混火焰区的曲率、应变和非定常效应对火焰速度的影响。具体的研究内容包括：(1)考虑非定常扰动和大振幅解的随时间变化的火焰结构，(2)近化学计量比混合物中的传播，(3)非均匀混合物对未燃烧气体的影响，以及(4)预混火焰与表面和受限环境相互作用的影响。一般的方法将包括使用基于一步全局动力学的大激活能渐近，并考虑从未燃烧气体到燃烧气体的密度变化。