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Stabilization and Dynamic of Premixed Swirling Flames

Stabilization and Dynamic of Premixed Swirling Flames
  • Author : Paul Palies
  • Publisher :Unknown
  • Release Date :2020-07-03
  • Total pages :400
  • ISBN : 9780128199978
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Summary : Stabilization and Dynamic of Premixed Swirling Flames: Prevaporized, Stratified, Partially, and Fully Premixed Regimes focuses on swirling flames in various premixed modes (stratified, partially, fully, prevaporized) for the combustor, and development and design of current and future swirl-stabilized combustion systems. This includes predicting capabilities, modeling of turbulent combustion, liquid fuel modeling, and a complete overview of stabilization of these flames in aeroengines. The book also discusses the effects of the operating envelope on upstream fresh gases and the subsequent impact of flame speed, combustion, and mixing, the theoretical framework for flame stabilization, and fully lean premixed injector design. Specific attention is paid to ground gas turbine applications, and a comprehensive review of stabilization mechanisms for premixed, partially-premixed, and stratified premixed flames. The last chapter covers the design of a fully premixed injector for future jet engine applications. Features a complete view of the challenges at the intersection of swirling flame combustors, their requirements, and the physics of fluids at work Addresses the challenges of turbulent combustion modeling with numerical simulations Includes the presentation of the very latest numerical results and analyses of flashback, lean blowout, and combustion instabilities Covers the design of a fully premixed injector for future jet engine applications

Stabilization and Dynamic of Premixed Swirling Flames

Stabilization and Dynamic of Premixed Swirling Flames
  • Author : Paul Palies
  • Publisher :Unknown
  • Release Date :2020-08-17
  • Total pages :600
  • ISBN : 9780128199961
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Summary : Stabilization and Dynamic of Premixed Swirling Flames: Prevaporized, Stratified, Partially, and Fully Premixed Regimes focuses on swirling flames in various premixed modes (stratified, partially, fully, prevaporized) for the combustor, and development and design of current and future swirl-stabilized combustion systems. This includes predicting capabilities, modeling of turbulent combustion, liquid fuel modeling, and a complete overview of stabilization of these flames in aeroengines. The book also discusses the effects of the operating envelope on upstream fresh gases and the subsequent impact of flame speed, combustion, and mixing, the theoretical framework for flame stabilization, and fully lean premixed injector design. Specific attention is paid to ground gas turbine applications, and a comprehensive review of stabilization mechanisms for premixed, partially-premixed, and stratified premixed flames. The last chapter covers the design of a fully premixed injector for future jet engine applications. Features a complete view of the challenges at the intersection of swirling flame combustors, their requirements, and the physics of fluids at work Addresses the challenges of turbulent combustion modeling with numerical simulations Includes the presentation of the very latest numerical results and analyses of flashback, lean blowout, and combustion instabilities Covers the design of a fully premixed injector for future jet engine applications

Swirl-stabilized Lean-premixed Flame Combustion Dynamics: An Experimental Investigation of Flame Stabilization, Flame Dynamics and Combustion Instability Control Strategies

Swirl-stabilized Lean-premixed Flame Combustion Dynamics: An Experimental Investigation of Flame Stabilization, Flame Dynamics and Combustion Instability Control Strategies
  • Author : Rajavasanth Rajasegar
  • Publisher :Unknown
  • Release Date :2018
  • Total pages :229
  • ISBN : OCLC:1084742595
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Summary :

Unsteady Combustor Physics

Unsteady Combustor Physics
  • Author : Tim C. Lieuwen
  • Publisher :Unknown
  • Release Date :2012-08-27
  • Total pages :229
  • ISBN : 9781139576833
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Summary : Developing clean, sustainable energy systems is a pre-eminent issue of our time. Most projections indicate that combustion-based energy conversion systems will continue to be the predominant approach for the majority of our energy usage. Unsteady combustor issues present the key challenge associated with the development of clean, high-efficiency combustion systems such as those used for power generation, heating or propulsion applications. This comprehensive study is unique, treating the subject in a systematic manner. Although this book focuses on unsteady combusting flows, it places particular emphasis on the system dynamics that occur at the intersection of the combustion, fluid mechanics and acoustic disciplines. Individuals with a background in fluid mechanics and combustion will find this book to be an incomparable study that synthesises these fields into a coherent understanding of the intrinsically unsteady processes in combustors.

Swirling Flows and Flames

Swirling Flows and Flames
  • Author : Toufik Boushaki
  • Publisher :Unknown
  • Release Date :2019-06-26
  • Total pages :118
  • ISBN : 9781838807436
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Summary : Swirl flows are used in a wide range of industrial applications. In non-reacting cases, examples of applications include vortex amplifiers and reactors, heat exchangers, jet pumps, and cyclone separators. In reacting cases, swirlers are widely used in combustion systems, such as gas turbines, industrial furnaces, boilers, gasoline and diesel engines, and many other practical heating devices. Effects of using swirl on flow and combustion are significant and varied, and concern, for example, aerodynamics, mixing, flame stability, intensity of combustion, and pollutant emissions. The purpose of this book is to present recent research efforts to understand and characterize swirling flows of different types and in different applications. These include gaseous, liquid, and solid fuels in order to enhance combustion systems and their energy efficiency. Swirl flows are very complex and the studies proposed in this project are based on different means, including theoretical calculations, numerical modeling, and experimental measurements.

Microfluidics and Nanofluidics

Microfluidics and Nanofluidics
  • Author : Mohsen Sheikholeslami Kandelousi
  • Publisher :Unknown
  • Release Date :2018-08-22
  • Total pages :318
  • ISBN : 9781789235401
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Summary : In the present book, various applications of microfluidics and nanofluidics are introduced. Microfluidics and nanofluidics span a broad array of disciplines including mechanical, materials, and electrical engineering, surface science, chemistry, physics and biology. Also, this book deals with transport and interactions of colloidal particles and biomolecules in microchannels, which have great importance to many microfluidic applications, such as drug delivery in life science, microchannel heat exchangers in electronic cooling, and food processing industry. Furthermore, this book focuses on a detailed description of the thermal transport behavior, challenges and implications that involve the development and use of HTFs under the influence of atomistic-scale structures and industrial applications.

Combustion Instabilities in Gas Turbine Engines

Combustion Instabilities in Gas Turbine Engines
  • Author : Timothy C. Lieuwen,Vigor Yang
  • Publisher :Unknown
  • Release Date :2005
  • Total pages :657
  • ISBN : UOM:39015062471126
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Summary : This book offers gas turbine users and manufacturers a valuable resource to help them sort through issues associated with combustion instabilities. In the last ten years, substantial efforts have been made in the industrial, governmental, and academic communities to understand the unique issues associated with combustion instabilities in low-emission gas turbines. The objective of this book is to compile these results into a series of chapters that address the various facets of the problem. The Case Studies section speaks to specific manufacturer and user experiences with combustion instabilities in the development stage and in fielded turbine engines. The book then goes on to examine The Fundamental Mechanisms, The Combustor Modeling, and Control Approaches.

Laser Diagnostics for Combustion Temperature and Species

Laser Diagnostics for Combustion Temperature and Species
  • Author : Alan C. Eckbreth
  • Publisher :Unknown
  • Release Date :1996-10-10
  • Total pages :630
  • ISBN : 9056995324
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Summary : This book examines the variety of potential laser diagnostic techniques and presents a considerable theoretical foundation elucidating physics relevant to the laser diagnostics. It explains the Raman-based approaches for major species and temperature measurements.

Swirl Flows

Swirl Flows
  • Author : Ashwani K. Gupta,D. G. Lilley,Nick Syred
  • Publisher :Unknown
  • Release Date :1984
  • Total pages :475
  • ISBN : UOM:39015013066611
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Summary :

Turbulence and Interactions

Turbulence and Interactions
  • Author : Michel O. Deville,Vincent Couaillier,Jean-Luc Estivalezes,Vincent Gleize,Thiên HiêpLê,Marc Terracol,Stéphane Vincent
  • Publisher :Unknown
  • Release Date :2017-09-11
  • Total pages :280
  • ISBN : 9783319603872
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Summary : This book presents a snapshot of the state-of-art in the field of turbulence modeling, with an emphasis on numerical methods. Topics include direct numerical simulations, large eddy simulations, compressible turbulence, coherent structures, two-phase flow simulation and many more. It includes both theoretical contributions and experimental works, as well as chapters derived from keynote lectures, presented at the fourth Turbulence and Interactions Conference (TI 2015), which was held on June 11-14 in Cargèse, Corsica, France. This multifaceted collection, which reflects the conference ́s emphasis on the interplay of theory, experiments and computing in the process of understanding and predicting the physics of complex flows and solving related engineering problems, offers a timely guide for students, researchers and professionals in the field of applied computational fluid dynamics, turbulence modeling and related areas.

Turbulent Combustion

Turbulent Combustion
  • Author : Norbert Peters
  • Publisher :Unknown
  • Release Date :2000-08-15
  • Total pages :304
  • ISBN : 1139428063
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Summary : 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.

Coarse Grained Simulation and Turbulent Mixing

Coarse Grained Simulation and Turbulent Mixing
  • Author : Fernando F. Grinstein
  • Publisher :Unknown
  • Release Date :2016-05-31
  • Total pages :516
  • ISBN : 9781107137042
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Summary : Reviews our current understanding of the subject. For graduate students and researchers in computational fluid dynamics and turbulence.

Unsteady Supersonic Combustion

Unsteady Supersonic Combustion
  • Author : Mingbo Sun,Hongbo Wang,Zun Cai,Jiajian Zhu
  • Publisher :Unknown
  • Release Date :2020-04-14
  • Total pages :345
  • ISBN : 9789811535956
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Summary : This book describes the unsteady phenomena needed to understand supersonic combustion. Following an initial chapter that introduces readers to the basic concepts in and classical studies on unsteady supersonic combustion, the book highlights recent studies on unsteady phenomena, which offer insights on e.g. interactions between acoustic waves and flames, flow dominating instability, ignition instability, flame flashback, and near-blowout-limit combustion. In turn, the book discusses in detail the fundamental mechanisms of these phenomena, and puts forward practical suggestions for future scramjet design.

Approaches for Clean Combustion in Gas Turbines

Approaches for Clean Combustion in Gas Turbines
  • Author : Medhat A. Nemitallah,Ahmed A. Abdelhafez,Mohamed A. Habib
  • Publisher :Unknown
  • Release Date :2020-03-24
  • Total pages :417
  • ISBN : 9783030440770
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Summary : This book focuses on the development of novel combustion approaches and burner designs for clean power generation in gas turbines. It shows the reader how to control the release of pollutants to the environment in an effort to reduce global warming. After an introduction to global warming issues and clean power production for gas turbine applications, subsequent chapters address premixed combustion, burner designs for clean power generation, gas turbine performance, and insights on gas turbine operability. Given its scope, the book can be used as a textbook for graduate-level courses on clean combustion, or as a reference book to accompany compact courses for mechanical engineers and young researchers around the world.

CFD Techniques and Energy Applications

CFD Techniques and Energy Applications
  • Author : Zied Driss,Brahim Necib,Hao-Chun Zhang
  • Publisher :Unknown
  • Release Date :2018-02-22
  • Total pages :194
  • ISBN : 9783319709505
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Summary : This book focuses on CFD (Computational Fluid Dynamics) techniques and the recent developments and research works in energy applications. It is devoted to the publication of basic and applied studies broadly related to this area. The chapters present the development of numerical methods, computational techniques, and case studies in the energy applications. Also, they offer the fundamental knowledge for using CFD in energy applications through new technical approaches. Besides, they describe the CFD process steps and provide benefits and issues for using CFD analysis in understanding the flow complicated phenomena and its use in the design process. The best practices for reducing errors and uncertainties in the CFD analysis are further described. The book reveals not only the recent advances and future research trends of CFD Techniques but also provides the reader with valuable information about energy applications. It aims to provide the readers, such as engineers and PhD students, with the fundamentals of CFD prior to embarking on any real simulation project. Additionally, engineers supporting or being supported by CFD analysts can take advantage from the information of the book’s different chapters. ​

Fundamentals of Turbulent and Multiphase Combustion

Fundamentals of Turbulent and Multiphase Combustion
  • Author : Kenneth Kuan-yun Kuo,Ragini Acharya
  • Publisher :Unknown
  • Release Date :2012-07-03
  • Total pages :912
  • ISBN : 9781118099292
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Summary : Detailed coverage of advanced combustion topics from the authorof Principles of Combustion, Second Edition Turbulence, turbulent combustion, and multiphase reacting flowshave become major research topics in recent decades due to theirapplication across diverse fields, including energy, environment,propulsion, transportation, industrial safety, and nanotechnology.Most of the knowledge accumulated from this research has never beenpublished in book form—until now. Fundamentals of Turbulentand Multiphase Combustion presents up-to-date, integrated coverageof the fundamentals of turbulence, combustion, and multiphasephenomena along with useful experimental techniques, includingnon-intrusive, laser-based measurement techniques, providing a firmbackground in both contemporary and classical approaches. Beginningwith two full chapters on laminar premixed and non-premixed flames,this book takes a multiphase approach, beginning with more commontopics and moving on to higher-level applications. In addition, Fundamentals of Turbulent and MultiphaseCombustion: Addresses seven basic topical areas in combustion and multiphaseflows, including laminar premixed and non-premixed flames, theoryof turbulence, turbulent premixed and non-premixed flames, andmultiphase flows Covers spray atomization and combustion, solid-propellantcombustion, homogeneous propellants, nitramines, reactingboundary-layer flows, single energetic particle combustion, andgranular bed combustion Provides experimental setups and results wheneverappropriate Supported with a large number of examples and problems as wellas a solutions manual, Fundamentals of Turbulent and MultiphaseCombustion is an important resource for professional engineers andresearchers as well as graduate students in mechanical, chemical,and aerospace engineering.

Turbulent Premixed Flames

Turbulent Premixed Flames
  • Author : Nedunchezhian Swaminathan,K. N. C. Bray
  • Publisher :Unknown
  • Release Date :2011-04-25
  • Total pages :229
  • ISBN : 9781139498586
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Summary : A work on turbulent premixed combustion is timely 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 recently on this topic. Thus, it is timely to edit a cohesive volume containing contributions from international experts on various subtopics of the lean premixed flame problem.

Flashback Mechanisms in Lean Premixed Gas Turbine Combustion

Flashback Mechanisms in Lean Premixed Gas Turbine Combustion
  • Author : Ali Cemal Benim,Khawar Jamil Syed
  • Publisher :Unknown
  • Release Date :2014-12-01
  • Total pages :134
  • ISBN : 9780128008263
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Summary : Blending fuels with hydrogen offers the potential to reduce NOx and CO2 emissions in gas turbines, but doing so introduces potential new problems such as flashback. Flashback can lead to thermal overload and destruction of hardware in the turbine engine, with potentially expensive consequences. The little research on flashback that is available is fragmented. Flashback Mechanisms in Lean Premixed Gas Turbine Combustion by Ali Cemal Benim will address not only the overall issue of the flashback phenomenon, but also the issue of fragmented and incomplete research. Presents a coherent review of flame flashback (a classic problem in premixed combustion) and its connection with the growing trend of popularity of more-efficient hydrogen-blend fuels Begins with a brief review of industrial gas turbine combustion technology Covers current environmental and economic motivations for replacing natural gas with hydrogen-blend fuels

Unsteady Combustion

Unsteady Combustion
  • Author : F. Culick,M.V. Heitor,J.H. Whitelaw
  • Publisher :Unknown
  • Release Date :2012-12-06
  • Total pages :562
  • ISBN : 9789400916203
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Summary : This book contains selected papers prepared for the NATO Advanced Study Institute on "Unsteady Combustion", which was held in Praia da Granja, Portugal, 6-17 September 1993. Approximately 100 delegates from 14 countries attended. The Institute was the most recent in a series beginning with "Instrumentation for Combustion and Flow in Engines", held in Vimeiro, Portugal 1987 and followed by "Combusting Flow Diagnostics" conducted in Montechoro, Portugal in 1990. Together, these three Institutes have covered a wide range of experimental and theoretical topics arising in the research and development of combustion systems with particular emphasis on gas-turbine combustors and internal combustion engines. The emphasis has evolved roughly from instrumentation and experimental techniques to the mixture of experiment, theory and computational work covered in the present volume. As the title of this book implies, the chief aim of this Institute was to provide a broad sampling of problems arising with time-dependent behaviour in combustors. In fact, of course, that intention encompasses practically all possibilities, for "steady" combustion hardly exists if one looks sufficiently closely at the processes in a combustion chamber. The point really is that, apart from the excellent paper by Bahr (Chapter 10) discussing the technology of combustors for aircraft gas turbines, little attention is directed to matters of steady performance. The volume is divided into three parts devoted to the subjects of combustion-induced oscillations; combustion in internal combustion engines; and experimental techniques and modelling.

Theoretical and Numerical Combustion

Theoretical and Numerical Combustion
  • Author : Thierry Poinsot,Denis Veynante
  • Publisher :Unknown
  • Release Date :2005
  • Total pages :522
  • ISBN : 1930217102
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Summary : 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,

Modeling and Simulation of Turbulent Combustion

Modeling and Simulation of Turbulent Combustion
  • Author : Santanu De,Avinash Kumar Agarwal,Swetaprovo Chaudhuri,Swarnendu Sen
  • Publisher :Unknown
  • Release Date :2017-12-12
  • Total pages :661
  • ISBN : 9789811074103
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Summary : 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.