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GENERATION OF PREMIX LAMINAR FLAME SPEED LIBRARY

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Page : pages

File Size : 27,58 MB

Release : 2020

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Abstract : The Laminar flame speed is an essential parameter in measuring turbulent premixed combustion applied in Spark ignition engines. Instead of using power-law correlations, which is valid only for particular ranges, the procedure for generating a premixed laminar flame speed library is defined using MTU - Master mechanism for a wide range of charge mixture conditions inside an engine combustion chamber: Temperature (300 - 700 K), Pressure (1 - 70 bar) and reactant mixture composition of equivalence ratio (0.4 - 2.0) Laminar flame speed library is generated for methane. The mechanism's performance was improved by adjusting the pre-exponential factor of the most sensitive reactions found from the sensitivity analysis to match the simulation results with experimental data in the literature. It is observed that the sensitivity order of reactions changes for different operating conditions, except that H+O2=O+OH, is the most sensitive reaction.





Combustion Theory

Author : Forman A. Williams

Publisher : CRC Press

Page : 549 pages

File Size : 19,92 MB

Release : 2018-03-05

Category : Science

ISBN : 0429973683

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Book Description

Combustion Theory delves deeper into the science of combustion than most other texts and gives insight into combustions from a molecular and a continuum point of view. The book presents derivations of the basic equations of combustion theory and contains appendices on the background of subjects of thermodynamics, chemical kinetics, fluid dynamics, and transport processes. Diffusion flames, reactions in flows with negligible transport and the theory of pre-mixed flames are treated, as are detonation phenomena, the combustion of solid propellents, and ignition, extinction, and flamibility pehnomena.



Fundamentals of Combustion Processes

Author : Sara McAllister

Publisher : Springer Science & Business Media

Page : 315 pages

File Size : 12,1 MB

Release : 2011-05-10

Category : Science

ISBN : 1441979433

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Book Description

Fundamentals of Combustion Processes is designed as a textbook for an upper-division undergraduate and graduate level combustion course in mechanical engineering. The authors focus on the fundamental theory of combustion and provide a simplified discussion of basic combustion parameters and processes such as thermodynamics, chemical kinetics, ignition, diffusion and pre-mixed flames. The text includes exploration of applications, example exercises, suggested homework problems and videos of laboratory demonstrations



Turbulent Premixed Flames

Author : Nedunchezhian Swaminathan

Publisher : Cambridge University Press

Page : 447 pages

File Size : 17,96 MB

Release : 2011-04-25

Category : Technology & Engineering

ISBN : 1139498584

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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.



Turbulent Combustion

Author : Norbert Peters

Publisher : Cambridge University Press

Page : 322 pages

File Size : 50,40 MB

Release : 2000-08-15

Category : Science

ISBN : 1139428063

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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.



Laser Diagnostics for Combustion Temperature and Species

Author : Alan C. Eckbreth

Publisher : CRC Press

Page : 636 pages

File Size : 27,83 MB

Release : 1996-10-10

Category : Technology & Engineering

ISBN : 9789056995324

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Book Description

Focusing on spectroscopically-based, spatially-precise, laser techniques for temperature and chemical composition measurements in reacting and non-reacting flows, this book makes these powerful and important new tools in combustion research



Combustion

Author : J. Warnatz

Publisher : Springer Science & Business Media

Page : 309 pages

File Size : 45,50 MB

Release : 2013-04-17

Category : Science

ISBN : 3662045087

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Book Description

This book provides a rigorous treatment of the coupling of chemical reactions and fluid flow. Combustion-specific topics of chemistry and fluid mechanics are considered and tools described for the simulation of combustion processes. This edition is completely restructured. Mathematical Formulae and derivations as well as the space-consuming reaction mechanisms have been replaced from the text to appendix. A new chapter discusses the impact of combustion processes on the atmosphere, the chapter on auto-ignition is extended to combustion in Otto- and Diesel-engines, and the chapters on heterogeneous combustion and on soot formation are heavily revised.



Combustion

Author : J. Warnatz

Publisher : Springer Science & Business Media

Page : 389 pages

File Size : 37,70 MB

Release : 2006-09-23

Category : Technology & Engineering

ISBN : 3540453636

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Book Description

This book provides a rigorous treatment of the coupling of chemical reactions and fluid flow. Combustion-specific topics of chemistry and fluid mechanics are considered and tools described for the simulation of combustion processes. This edition is completely restructured. Mathematical Formulae and derivations as well as the space-consuming reaction mechanisms have been replaced from the text to appendix. A new chapter discusses the impact of combustion processes on the atmosphere, the chapter on auto-ignition is extended to combustion in Otto- and Diesel-engines, and the chapters on heterogeneous combustion and on soot formation are heavily revised.



Combustion, Flames and Explosions of Gases

Author : Bernard Lewis

Publisher : Academic Press

Page : 754 pages

File Size : 47,47 MB

Release : 2013-10-22

Category : Science

ISBN : 1483258394

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Book Description

Combustion, Flames, and Explosions of Gases, Second Edition focuses on the processes, methodologies, and reactions involved in combustion phenomena. The publication first offers information on theoretical foundations, reaction between hydrogen and oxygen, and reaction between carbon monoxide and oxygen. Discussions focus on the fundamentals of reaction kinetics, elementary and complex reactions in gases, thermal reaction, and combined hydrogen-carbon monoxide-oxygen reaction. The text then elaborates on the reaction between hydrocarbons and oxygen and combustion waves in laminar flow. The manuscript tackles combustion waves in turbulent flow and air entrainment and burning of jets of fuel gases. Topics include effect of turbulence spectrum and turbulent wrinkling on combustion wave propagation; ignition of high-velocity streams by hot solid bodies; burners with primary air entrainment; and description of jet flames. The book then takes a look at detonation waves in gases; emission spectra, ionization, and electric-field effects in flames; and methods of flame photography and pressure recording. The publication is a valuable reference for readers interested in combustion phenomena.