Evaluation of the Local Burning Velocity Using DNS Data of Turbulent Premixed Flames
نویسندگان
چکیده
منابع مشابه
Temperature response of turbulent premixed flames to inlet velocity oscillations
Flame–turbulence interactions are at the heart of modern combustion research as they have a major influence on efficiency, stability of operation and pollutant emissions. The problem remains a formidable challenge, and predictive modelling and the implementation of active control measures both rely on further fundamental measurements. Model burners with simple geometry offer an opportunity for ...
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1. Introduction Premixed turbulent flames are of increasing practical importance and remain a significant research challenge in the combustion community. These flames have the potential to operate cleanly and efficiently over a broad range of fuels, and therefore to represent a key element in the implementation of low-emissions burners for a variety of industrial applications. However, it is di...
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The upstream interaction of twin premixed hydrogen-air flames in 2-D turbulence is studied using direct numerical simulations with detailed chemistry. The primary objective is to determine the effect of flame stretch on the overall burning rate during various stages of the interaction. Preferential diffusion effects are accounted for by varying the equivalence ratio from symmetric rich-rich to ...
متن کاملEffects of Flow Transients on the Burning Velocity of Laminar Hydrogen/air Premixed Flames
The effects of unsteady strain rate on the burning velocity of hydrogen/air premixed flames have been studied in an opposed nozzle configuration. The numerical method employs adaptive time integration of a system of differential–algebraic equations. Detailed hydrogen/air kinetic mechanism and transport properties are considered. The equivalence ratio is varied from lean to rich premixtures in o...
متن کاملExperimental investigation of the nonlinear response of turbulent premixed flames to imposed inlet velocity oscillations
This paper describes an experimental investigation of acoustically forced lean premixed turbulent bluff-bodystabilised flames in an enclosure short enough so that no coupling of the combustor downstream acoustics occurred for the frequencies studied here, which allows an unambiguous examination of the flame response to inlet velocity fluctuations. Special emphasis was placed on the amplitude de...
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ژورنال
عنوان ژورنال: Natural Science
سال: 2014
ISSN: 2150-4091,2150-4105
DOI: 10.4236/ns.2014.612093