A Theoretical Study of Flow Structure and Radiation for Multiphase Turbulent Diffusion Flames PDF Download
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Author: Chin Feng Chern
Publisher:
ISBN:
Category : Flame
Languages : en
Pages : 368
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Book Description
The present technical report summarizes the progress made in considering thermal radiation in the analysis of multiphase turbulent flow structure of a halogen gas jet reacts with a liquid metal. The reaction of a halogen gas jet submerged in an alkali liquid metal fuel forms a complex diffusion flame. The flame is turbulent and multiphase in nature and its temperature is relatively high. The purpose of this study is to account for thermal radiation and the radiation/turbulent interaction in analyzing such a diffusion flame structure. A method is hereby proposed to consider the turbulence-radiation interaction in the analysis of a multiphase diffusion flame. Application is made to study the reaction of a halogen gas jet submerged in a alkali liquid fuel bath. The analysis makes use of a k-epsilon-g turbulence model, a local homogeneous two-phase model, a chemical equilibrium combustion model, a probabilistic approach and a radiation model compatible with mixture fraction fluctuation. The equilibrium state relationships for instantaneous properties, required for mean scalar property predictions and structure analysis of the reacting jet, have been generated. The energy equation containing the radiative source term has been solved simultaneously with the FAvre-averaged transport equations. (jhd).
Author: Chin Feng Chern
Publisher:
ISBN:
Category : Flame
Languages : en
Pages : 368
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Book Description
The present technical report summarizes the progress made in considering thermal radiation in the analysis of multiphase turbulent flow structure of a halogen gas jet reacts with a liquid metal. The reaction of a halogen gas jet submerged in an alkali liquid metal fuel forms a complex diffusion flame. The flame is turbulent and multiphase in nature and its temperature is relatively high. The purpose of this study is to account for thermal radiation and the radiation/turbulent interaction in analyzing such a diffusion flame structure. A method is hereby proposed to consider the turbulence-radiation interaction in the analysis of a multiphase diffusion flame. Application is made to study the reaction of a halogen gas jet submerged in a alkali liquid fuel bath. The analysis makes use of a k-epsilon-g turbulence model, a local homogeneous two-phase model, a chemical equilibrium combustion model, a probabilistic approach and a radiation model compatible with mixture fraction fluctuation. The equilibrium state relationships for instantaneous properties, required for mean scalar property predictions and structure analysis of the reacting jet, have been generated. The energy equation containing the radiative source term has been solved simultaneously with the FAvre-averaged transport equations. (jhd).
Author: S-M. Jeng
Publisher:
ISBN:
Category : Flame spread
Languages : en
Pages :
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Book Description
Author: Kenneth Kuan-yun Kuo
Publisher: John Wiley & Sons
ISBN: 111809929X
Category : Science
Languages : en
Pages : 914
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Book Description
Detailed coverage of advanced combustion topics from the author of Principles of combustion, Second Edition Turbulence, turbulent combustion, and multiphase reacting flows have become major research topics in recent decades due to their application across diverse fields, including energy, environment, propulsion, transportation, industrial safety, and nanotechnology. Most of the knowledge accumulated from this research has never been published in book form—until now. Fundamentals of Turbulent and Multiphase Combustion presents up-to-date, integrated coverage of the fundamentals of turbulence, combustion, and multiphase phenomena along with useful experimental techniques, including non-intrusive, laser-based measurement techniques, providing a firm background in both contemporary and classical approaches. Beginning with two full chapters on laminar premixed and non-premixed flames, this book takes a multiphase approach, beginning with more common topics and moving on to higher-level applications. In addition, Fundamentals of Turbulent and Multiphase Combustion: Addresses seven basic topical areas in combustion and multiphase flows, including laminar premixed and non-premixed flames, theory of turbulence, turbulent premixed and non-premixed flames, and multiphase flows Covers spray atomization and combustion, solid-propellant combustion, homogeneous propellants, nitramines, reacting boundary-layer flows, single energetic particle combustion, and granular bed combustion Provides experimental setups and results whenever appropriate Supported with a large number of examples and problems as well as a solutions manual, Fundamentals of Turbulent and Multiphase Combustion is an important resource for professional engineers and researchers as well as graduate students in mechanical, chemical, and aerospace engineering.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 836
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Book Description
Author: P. E. Botros
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: MICHAEL EMMANUEL KOUNALAKIS
Publisher:
ISBN:
Category : Flame
Languages : en
Pages : 271
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Book Description
scales. (Abstract shortened with permission of author.)
Author: Guan Heng Yeoh
Publisher: Butterworth-Heinemann
ISBN: 0080570038
Category : Technology & Engineering
Languages : en
Pages : 545
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Book Description
Fire and combustion presents a significant engineering challenge to mechanical, civil and dedicated fire engineers, as well as specialists in the process and chemical, safety, buildings and structural fields. We are reminded of the tragic outcomes of ‘untenable’ fire disasters such as at King’s Cross underground station or Switzerland’s St Gotthard tunnel. In these and many other cases, computational fluid dynamics (CFD) is at the forefront of active research into unravelling the probable causes of fires and helping to design structures and systems to ensure that they are less likely in the future. Computational fluid dynamics (CFD) is routinely used as an analysis tool in fire and combustion engineering as it possesses the ability to handle the complex geometries and characteristics of combustion and fire. This book shows engineering students and professionals how to understand and use this powerful tool in the study of combustion processes, and in the engineering of safer or more fire resistant (or conversely, more fire-efficient) structures. No other book is dedicated to computer-based fire dynamics tools and systems. It is supported by a rigorous pedagogy, including worked examples to illustrate the capabilities of different models, an introduction to the essential aspects of fire physics, examination and self-test exercises, fully worked solutions and a suite of accompanying software for use in industry standard modeling systems. Computational Fluid Dynamics (CFD) is widely used in engineering analysis; this is the only book dedicated to CFD modeling analysis in fire and combustion engineering Strong pedagogic features mean this book can be used as a text for graduate level mechanical, civil, structural and fire engineering courses, while its coverage of the latest techniques and industry standard software make it an important reference for researchers and professional engineers in the mechanical and structural sectors, and by fire engineers, safety consultants and regulators Strong author team (CUHK is a recognized centre of excellence in fire eng) deliver an expert package for students and professionals, showing both theory and applications. Accompanied by CFD modeling code and ready to use simulations to run in industry-standard ANSYS-CFX and Fluent software
Author: Paul A. Libby
Publisher:
ISBN:
Category : Combustion
Languages : en
Pages : 12
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Book Description
Author: Thierry Baritaud
Publisher: Editions TECHNIP
ISBN: 9782710806981
Category : Science
Languages : en
Pages : 328
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Book Description
Contents: Description of accurate boundary conditions for the simulation of reactive flows. Parallel direct numerical simulation of turbulent reactive flow. Flame-wall interaction and heat flux modelling in turbulent channel flow. A numerical study of laminar flame wall interaction with detailed chemistry: wall temperature effects. Modeling and simulation of turbulent flame kernel evolution. Experimental and theoretical analysis of flame surface density modelling for premixed turbulent combustion. Gradient and counter-gradient transport in turbulent premixed flames. Direct numerical simulation of turbulent flames with complex chemical kinetics. Effects of curvature and unsteadiness in diffusion flames. Implications for turbulent diffusion combustion. Numerical simulations of autoignition in turbulent mixing flows. Stabilization processes of diffusion flames. References.
Author: Michael F. Modest
Publisher: Springer
ISBN: 3319272918
Category : Science
Languages : en
Pages : 167
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Book Description
This introduction reviews why combustion and radiation are important, as well as the technical challenges posed by radiation. Emphasis is on interactions among turbulence, chemistry and radiation (turbulence-chemistry-radiation interactions – TCRI) in Reynolds-averaged and large-eddy simulations. Subsequent chapters cover: chemically reacting turbulent flows; radiation properties, Reynolds transport equation (RTE) solution methods, and TCRI; radiation effects in laminar flames; TCRI in turbulent flames; and high-pressure combustion systems. This Brief presents integrated approach that includes radiation at the outset, rather than as an afterthought. It stands as the most recent developments in physical modeling, numerical algorithms, and applications collected in one monograph.
