Journal ArticleDOI
Three-Dimensional Numerical Simulations of Turbulent, Bluff-Body Stabilized, Lean, Premixed Combustion
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In this paper, three-dimensional (3D) unsteady numerical simulations of turbulent, bluff-body, stabilized, lean, premixed combustion are reported, and the three dimensionality of the flame is clearly demonstrated through velocity and temperature profiles.Abstract:
Results from three-dimensional (3D) unsteady numerical simulations of turbulent, bluff-body, stabilized, lean, premixed combustion are reported. Shear stress transport (SST) k − ω model has been used for modeling turbulence, while a detailed 43-step mechanism has been used for modeling the methane, air chemistry. Turbulence chemistry interaction has been modeled using the eddy dissipation concept. Calculation has been done with buoyancy effects included to account for the effect of buoyancy on the predicted results. The three dimensionality of the flame is clearly demonstrated through velocity and temperature profiles. The intensity of turbulence is greatly enhanced by the flame, which is located at the shear layer, and thus the role of the flame as a turbulence generator is highlighted. The shear layer separates the cold reactants and the hot products, and is thus highly strained. The spectral analysis of time histories of pressure and velocity reveal that the lowest and highest dominant frequencies corr...read more
Citations
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Journal ArticleDOI
Application of unstrained flamelet SGS closure for multi-regime premixed combustion
TL;DR: In this article, a large eddy simulation of turbulent premixed combustion behind a bluff-body is performed using unstrained flamelet model with a presumed probability density function to calculate filtered reaction rate.
Journal ArticleDOI
The Effects of Inlet Turbulence Intensity and Computational Domain on a Nonpremixed Bluff-Body Flame
Lu Chen,Francine Battaglia +1 more
Dissertation
Computational Study of Turbulent Combustion Systems and Global Reactor Networks
TL;DR: In this paper, a numerical study of turbulent combustion systems was pursued to examine different computational modeling techniques, namely computational fluid dynamics (CFD) and chemical reactor network (CRN) methods.
References
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Journal ArticleDOI
Pdf modeling of co and no formation in lean premixed methane flames
TL;DR: In this article, a combination of computational fluid dynamics and Monte Carlo methods for the solution of the joint probability density function is proposed to simulate the CO and NO formation in a premixed turbulent methane flame.
Journal ArticleDOI
Implementing multi-step chemical kinetics models in opposed-flow flame spread over cellulose and a comparison to single-step chemistry
Proceedings ArticleDOI
LES of a Non-Premixed Flame Using an Extended Flamelet/Progress Variable Model
TL;DR: In this article, the statistically most likely distribution is proposed as a presumed probability density function (PDF) for the flamelet parameter in a conserved scalar based model for non-premixed combustion and uses a reactive scalar as an additional parameter in table lookup.
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