Results 141 to 150 of about 560 (183)

Influence of Fuel Premixing on Partially Premixed Flames in Porous-Wall Channels

International Journal of Nonlinear Sciences and Numerical Simulation, 2017
Abstract This paper examines the influence of mixing a fuel with an oxidizer-rich reactant on the existence and propagation of partially premixed flames formed in a porous-wall channel. The amount of the injected fuel has been taken as a parameter to generate different states of the combustion mixtures.
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Flame Structure Interactions and State Relationships in an Unsteady Partially Premixed Flame

AIAA Journal, 1998
In this investigation our objective is 1 ) to compare the similitude between an unsteady, two-dimensional (axisymmetric), partially premixed e ame and an analogous steady, partially premixed e amelet to determine if state relationshipsintermsofamodie edconservedscalarapplyand2 )toinvestigatee amestructureinteractionsbetween the various reaction zones ...
Suresh K. Aggarwal, Ishwar K. Puri
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Partially premixed flames in stagnating turbulence: The merging of planar triple flames

Combustion and Flame, 2008
Abstract The aim of this work, which takes a RANS perspective, is to consider the prospect of establishing a planar turbulent triple flame whose mean consists of two parallel premixed flame brushes separated by a nonpremixed flame brush. Experiments involving a counterflow between fuel-rich and fuel-lean turbulent streams are considered.
Bray, K.N.C., Champion, M., Libbay, P.A
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Combustion Modeling of Partially Premixed Flames

Volume 2: Combustion, Fuels and Emissions, Parts A and B, 2010
Accurate and properly validated turbulence-chemistry interaction models for RANS combustion computational fluid dynamics (CCFD) simulations are required in support of the development process of modern gas turbine combustors. Although standard models are available for fully premixed and purely non premixed turbulent combustion, models describing ...
Ilona Zimmermann, Michael Pfitzner
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Fuel effects on NOx emissions in partially premixed flames

Combustion and Flame, 2004
Abstract The requirement to significantly reduce NOx and particulate emissions while maintaining combustor performance is one of the main drivers for internal combustion engine research. Partially premixing and using fuel blends represent two promising approaches for reducing both the NOx and the particulate emissions from flames.
Suresh Aggarwal, Sayangdev Naha
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Structure and extinction of heptane/air partially premixed flames

AIAA Journal, 2002
A numerical investigation of the structure and extinction of n-heptane/air partially premixed e ames in a countere ow cone guration is reported. The e ame is computed using a detailed reaction mechanism consisting of 275 elementary reactions and 41 species.
Hongshe Xue, Suresh K. Aggarwal
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Edge flames and partially premixed combustion in diffusion flame quenching

Combustion and Flame, 2001
The aim is to focus on the development of partially premixed combustion after diffusion flame quenching. To this end, the quenching of a planar two-dimensional diffusion flame is studied by using numerical simulation. A flame hole is obtained by submitting the reaction zone to a high strain and scalar dissipation rate resulting from the interaction ...
Vervisch, Luc, Favier, Valérie
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Partial premixing and stratification in turbulent flames

Proceedings of the Combustion Institute, 2015
Abstract This paper reviews recent advances in understanding the structure of turbulent partially premixed and stratified flames. The term “partially premixed” refers here to compositionally inhomogeneous mixtures that include flammable and non-flammable fluid while “stratified” combustion refers to a reacting front propagating through a range of ...
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Turbulent flame propagation in partially premixed combustion

Symposium (International) on Combustion, 1998
Stratified spark-ignition engines that use direct fuel injection into the combustion chamber feature both small- and large-scale spatial variations in unburned mixture composition. In these configurations, the spark-ignited turbulent flame propagates into a mixture with variable equivalence ratio.
J. Hélie, A. Trouvé
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Multiple mapping conditioning for flames with partial premixing

Combustion and Flame, 2008
Fully closed multiple mapping conditioning (MMC) is used to model partially premixed flames in homogeneous, isotropic decaying turbulence where the partial premixing is caused by local extinction and reignition phenomena. Two reference variables that represent mixing and reaction progress, such as mixture fraction and sensible enthalpy, are used to ...
Kronenburg, A., Cleary, M. J.
openaire   +3 more sources