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Author:
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ISBN:
Category :
Languages : en
Pages : 69
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Book Description
The characteristics of nonpremixed flame-wall interaction have been studied in a reacting vortex ring configuration. A finite duration axisymmetric methane jet is injected into a quiescent oxidizer ambient to generate a laminar vortex ring. Fuel and oxidizer temperatures are adjusted such that auto-ignition takes place and results in the formation of a nonpremixed flame surrounding the vortex ring. The methane combustion is modelled using detailed kinetic mechanism CR13.0 with the reactions and the species containing nitrogen removed, except N 2 . The flame is propelled by the ring induced velocity and interacts with an isothermal inert wall which is perpendicular to the direction of the flame propagation. Interactions have been studied for two different wall conditions---one with and one without a thermal boundary layer. Heat release rate, vorticity, and temperature fields have been examined during the interaction.* (Abstract shortened by UMI.) *This dissertation is a compound document (contains both a paper copy and a CD as part of the dissertation). The CD requires the following system requirements: Windows MediaPlayer or RealPlayer.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 69
Get Book Here
Book Description
The characteristics of nonpremixed flame-wall interaction have been studied in a reacting vortex ring configuration. A finite duration axisymmetric methane jet is injected into a quiescent oxidizer ambient to generate a laminar vortex ring. Fuel and oxidizer temperatures are adjusted such that auto-ignition takes place and results in the formation of a nonpremixed flame surrounding the vortex ring. The methane combustion is modelled using detailed kinetic mechanism CR13.0 with the reactions and the species containing nitrogen removed, except N 2 . The flame is propelled by the ring induced velocity and interacts with an isothermal inert wall which is perpendicular to the direction of the flame propagation. Interactions have been studied for two different wall conditions---one with and one without a thermal boundary layer. Heat release rate, vorticity, and temperature fields have been examined during the interaction.* (Abstract shortened by UMI.) *This dissertation is a compound document (contains both a paper copy and a CD as part of the dissertation). The CD requires the following system requirements: Windows MediaPlayer or RealPlayer.
Author:
Publisher:
ISBN:
Category : Combustion
Languages : en
Pages : 138
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Book Description
Author: Santanu De
Publisher: Springer
ISBN: 9811074100
Category : Science
Languages : en
Pages : 663
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Book Description
This book presents a comprehensive review of state-of-the-art models for turbulent combustion, with special emphasis on the theory, development and applications of combustion models in practical combustion systems. It simplifies the complex multi-scale and nonlinear interaction between chemistry and turbulence to allow a broader audience to understand the modeling and numerical simulations of turbulent combustion, which remains at the forefront of research due to its industrial relevance. Further, the book provides a holistic view by covering a diverse range of basic and advanced topics—from the fundamentals of turbulence–chemistry interactions, role of high-performance computing in combustion simulations, and optimization and reduction techniques for chemical kinetics, to state-of-the-art modeling strategies for turbulent premixed and nonpremixed combustion and their applications in engineering contexts.
Author: Thierry Poinsot
Publisher: R.T. Edwards, Inc.
ISBN: 9781930217102
Category : Science
Languages : en
Pages : 544
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Book Description
Introducing numerical techniques for combustion, this textbook describes both laminar and turbulent flames, addresses the problem of flame-wall interaction, and presents a series of theoretical tools used to study the coupling phenomena between combustion and acoustics. The second edition incorporates recent advances in unsteady simulation methods,
Author: Jiawei Lai
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Author: Nedunchezhian Swaminathan
Publisher: Cambridge University Press
ISBN: 1139498584
Category : Technology & Engineering
Languages : en
Pages : 447
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Book Description
A work on turbulent premixed combustion is important because of increased concern about the environmental impact of combustion and the search for new combustion concepts and technologies. An improved understanding of lean fuel turbulent premixed flames must play a central role in the fundamental science of these new concepts. Lean premixed flames have the potential to offer ultra-low emission levels, but they are notoriously susceptible to combustion oscillations. Thus, sophisticated control measures are inevitably required. The editors' intent is to set out the modeling aspects in the field of turbulent premixed combustion. Good progress has been made on this topic, and this cohesive volume contains contributions from international experts on various subtopics of the lean premixed flame problem.
Author: Bart Merci
Publisher: CRC Press
ISBN: 1000755967
Category : Technology & Engineering
Languages : en
Pages : 355
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Book Description
- written by world leading experts in the field - contains many worked-out examples, taken from daily life fire related practical problems - covers the entire range from basics up to state-of-the-art computer simulations of fire and smoke related fluid mechanics aspects, including the effect of water - provides extensive treatment of the interaction of water sprays with a fire-driven flow - contains a chapter on CFD (Computational Fluid Dynamics), the increasingly popular calculation method in the field of fire safety science
Author: Cosmin Safta
Publisher:
ISBN:
Category :
Languages : en
Pages : 488
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Book Description
Author: Alessandro Parente
Publisher: Frontiers Media SA
ISBN: 2889717003
Category : Technology & Engineering
Languages : en
Pages : 160
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Book Description
Author: Norbert Peters
Publisher: Cambridge University Press
ISBN: 1139428063
Category : Science
Languages : en
Pages : 322
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Book Description
The combustion of fossil fuels remains a key technology for the foreseeable future. It is therefore important that we understand the mechanisms of combustion and, in particular, the role of turbulence within this process. Combustion always takes place within a turbulent flow field for two reasons: turbulence increases the mixing process and enhances combustion, but at the same time combustion releases heat which generates flow instability through buoyancy, thus enhancing the transition to turbulence. The four chapters of this book present a thorough introduction to the field of turbulent combustion. After an overview of modeling approaches, the three remaining chapters consider the three distinct cases of premixed, non-premixed, and partially premixed combustion, respectively. This book will be of value to researchers and students of engineering and applied mathematics by demonstrating the current theories of turbulent combustion within a unified presentation of the field.
