Unsteady Flamelet Modeling of Pollutant Emission in Diffusion Flame PDF Download
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Author: N. Al-Abbadi
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: N. Al-Abbadi
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: N. Al-Abbadi
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Naif Mohammed Al-Abbadi
Publisher:
ISBN:
Category :
Languages : en
Pages : 426
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Author: Şevket A. Baykal
Publisher:
ISBN:
Category :
Languages : en
Pages : 125
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Book Description
Author: Tarek Echekki
Publisher: Springer Science & Business Media
ISBN: 9400704127
Category : Technology & Engineering
Languages : en
Pages : 496
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Book Description
Turbulent combustion sits at the interface of two important nonlinear, multiscale phenomena: chemistry and turbulence. Its study is extremely timely in view of the need to develop new combustion technologies in order to address challenges associated with climate change, energy source uncertainty, and air pollution. Despite the fact that modeling of turbulent combustion is a subject that has been researched for a number of years, its complexity implies that key issues are still eluding, and a theoretical description that is accurate enough to make turbulent combustion models rigorous and quantitative for industrial use is still lacking. In this book, prominent experts review most of the available approaches in modeling turbulent combustion, with particular focus on the exploding increase in computational resources that has allowed the simulation of increasingly detailed phenomena. The relevant algorithms are presented, the theoretical methods are explained, and various application examples are given. The book is intended for a relatively broad audience, including seasoned researchers and graduate students in engineering, applied mathematics and computational science, engine designers and computational fluid dynamics (CFD) practitioners, scientists at funding agencies, and anyone wishing to understand the state-of-the-art and the future directions of this scientifically challenging and practically important field.
Author: Sylvie Honnet
Publisher: Cuvillier Verlag
ISBN: 386727391X
Category :
Languages : en
Pages : 147
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Author:
Publisher:
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Category :
Languages : en
Pages :
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Author: Alessandro Parente
Publisher: Frontiers Media SA
ISBN: 2889717003
Category : Technology & Engineering
Languages : en
Pages : 160
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Author:
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Category : Airplanes
Languages : en
Pages : 538
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Author: Charles Mueller
Publisher:
ISBN:
Category : Combustion
Languages : en
Pages : 13
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Book Description
A laminar methane-air diffusion flame is interacted with vortices of various sizes and strengths in order to better understand unsteady stretch and history effects on turbulent flames. The nitrogendiluted fuel stream of a Wolfhard-Parker slot burner is acoustically forced, producing repeatable two-dimensional vortices that strain and curve the flame. Phase locked, planar laser-induced fluorescence (PLIF) diagnostics are used to quantify the response of the OH-radical to the vortex-induced stretch. Acetone PLIF images are used to clarify the relationship between the vortex structure and the flame. The results show that the vortex causes significant variations in the OH layer thickness. In particular, negative strain produces a doubling of the flame thickness. Such large increases in OH layer thickness are not predicted by the laminar flamelet model (LFM) because negative strain rates cannot be simulated using standard counterflow flamelet geometry. Local extinction of the OH layer due to high strain is observed near the flame base. Peak OH mole fraction levels vary considerably more than adiabatic LFM predictions. In particular, the peak OH decreases by a factor of two with downstream distance. This decrease is believed due to dilution of reactants by combustion products formed elsewhere in the flow. A simplified model is proposed, which shows the OH concentration is sensitive to product dilution through the scalar dissipation rate.
