Extinction limits of nonadiabatic, catalyst-assisted flames in stagnation-point flow

Extinction Limits of Nonadiabatic, Catalyst-Assisted Flames in Stagnation- Point Flow

An idealized geometry corresponding to a premixed flame in stagnation-point flow is used to investigate the effects of catalysis on extending the extinction limits of nonadiabatic stretched flames. Specifically, a surface catalytic reaction is assumed to occur on the stagnation plane, thereby augmenting combustion in the bulk gas with an exothermic surface reaction characterized by a reduced ac...

Extinction Characteristics of Catalyst-Assisted Combustion in a Stagnation-Point Flow Reactor

As a fundamental study to understand physical and chemical characteristics in micro-combustors, numerical simulations of a stagnation-point flow combustor with a catalytic surface are performed. One-dimensional similarity formulation is derived with full consideration of detailed surface and gasphase chemical kinetic models. Parametric studies are conducted to investigate the effects of strain ...

Extinction Limits of Premixed Combustion Assisted by Catalytic Reaction in a Stagnation-Point Flow

Motivated by the potential use of catalytic materials in micro-combustor application, the primary scope of this study is to investigate the lean extinction characteristics of premixed flames in the presence of catalytic reaction. In particular, the effects of mixture dilution on the lean flammability limit are examined by adopting a stagnation-point flow system with a methane/air mixture over a...

Mathematical Model of Stagnation Point Flames

Effects of platinum stagnation surface on the lean extinction limits of premixed methane/air flames at moderate surface temperatures

0010-2180/$ see front matter 2010 The Combust doi:10.1016/j.combustflame.2010.08.002 ⇑ Corresponding author. Fax: +1 734 647 3170. E-mail address: [email protected] (J.T. Wiswall A stagnation flow reactor was used to study the effects of platinum on the lean flammability limits of atmospheric pressure premixed methane/air flames at moderate stagnation surface temperatures. Experimental and com...