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Stabilization and Dynamic of Premixed Swirling Flames
Prevaporized, Stratified, Partially, and Fully Premixed Regimes
- 1st Edition - July 3, 2020
- Author: Paul Palies
- Language: English
- Paperback ISBN:9 7 8 - 0 - 1 2 - 8 1 9 9 9 6 - 1
- eBook ISBN:9 7 8 - 0 - 1 2 - 8 1 9 9 9 7 - 8
Stabilization and Dynamic of Premixed Swirling Flames: Prevaporized, Stratified, Partially, and Fully Premixed Regimes focuses on swirling flames in various premixed modes (… Read more
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Request a sales quoteStabilization 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
1. The Combustor1. Overall Principle of the Gas Turbine Engine1.1. Generalities and Overall Description1.2. Components/Modules Technologies Description1.3. Thermodynamics and Non-reacting Fluid Dynamics
2. Combustor Role, Requirements and Environment2.1. Overall View2.2. Design and Requirements2.3. Combustor, injector and swirler designs
3. Combustor Architectures3.1. RQL3.2. LDI3.3. LPP3.4. LSI3.5. LFP
4. Operating Conditions and Flight Envelope 54
2. Premixed Combustion for Combustors
1. Mathematical descriptions1.1. Governing Equations of Reacting Flows1.2. G-Equation Formalism1.3. Decomposition in static and dynamic components2. Physical-Chemical Description2.1. Premixed Combustion Overview2.2. Swirling Flames Overview2.3. Acoustics Wave-Flame Interactions2.4. Autoignition2.5. Blowout2.6. Chemical Kinetic2.7. Combustion Noise2.8. Combustion Instability2.9. Flame Speed2.10. Flame Stretch2.11. Flammability Limits2.12. Flashback2.13. Ignition2.14. Pollutants Emissions2.15. Turbulent Combustion2.16. Turbulent Mixing
3. Combustion modes3.1. Overview3.2. Pre-vaporized Mode3.3. Partially Premixed Mode3.4. Stratified Premixed Mode3.5. Fully Premixed Mode
4. Effect of operating conditions on premixed combustion and impact on flame4.1. Current operating conditions4.2. Fuel, equivalence ratio and power settings engine matching
3. Premixed Swirling Flame Stabilization
1. Mechanisms and processes of stabilization1.1. Definitions1.2. Key stabilization mechanisms: local contributors1.3. Local equivalence ratio1.4. Flame stretch1.5. Flame speed versus flow speed1.6. Reaction rates1.7. Vorticity1.8. Temperature, pressure and density (Equation of State)1.9. Governing equations1.10. Role and impact of global flow/flame features2. Framework for flame stabilization study: application2.1. Numerical procedure2.2. Statistically steady flame dynamics3. Theoretical results on flame stabilization and propagation3.1. Flowfield decomposition and theoretical approach: framework3.2. Regimes and configurations3.3. Expressions for laminar and turbulent planar flames in open tubes3.4. Expressions for the static component of stabilized flame3.5. Expressions for the dynamic component of stabilized flame3.6. Swirling flame numerical simulations: results and discussion3.7. Summary
4. Effect of operating conditions, swirl number and fuel on flame stabilization
4. Transient Combustion1. Introduction1.1. Definitions1.2. Data sciences and data analysis1.3. Measurements and diagnostics
2. Unsteady Premixed Combustion2.1. Laminar unsteady premixed combustion2.2. Turbulent premixed combustion
3. Combustor Engine Transient
4. Configuration Case Study4.1. Methodology and Numerical Procedure4.2. Time average versus instantaneous velocity field4.3. Flashback4.4. Lean blowout4.5. Transient to limit cycle
5. Fundamentals mechanisms and link between steady and unsteady combustion)5.1. Static and dynamic stability link5.2. Static stability5.3. Dynamic stability
6. Technologies and control for flame stabilization and combustion instability6.1. State of the art6.2. Effect of swirler position6.3. Effect of geometry6.4. Effect of operating condition, equivalence ratio and fuel
5. Swirling Flame Dynamic and Combustion Instability
1. Combustor Acoustics1.1. Combustion instability loop1.2. Network acoustics model1.3. Acoustics codes1.4. Upstream flow modulation versus self-sustained oscillations1.5. Flow modulation and Navier-Stokes characteristics boundary conditions models (NSCBC)2. Modulated swirling flames dynamic2.1. Flame responses2.2. Flow dynamic mode conversion processes occurring upstream of the flame2.3. Unsteady flame front dynamics2.4. Combustion dynamics mechanisms
3. Combustion instability3.1. Combustion instability prediction3.2. Coupling and stability criteria3.3. Longitudinal instabilities3.4. Tangential instabilities
6. Design and Numerical Simulations Modeling
1. Context and challenges2. Modeling of flow modulations in numerical simulations2.1. Introduction2.2. Combustor Dynamics Modulation Models2.3. Inlet modulation in an isothermal duct2.4. Application to a bluff-body stabilized flame2.5. Conclusions
3. Modeling approaches and assumptions3.1. Unsteady Reynolds Averaged Navier-Stokes3.2. Large Eddy Simulations
4. Chemical kinetic
5. Turbulent combustion modeling5.1. Thickened flame models5.2. Flamelet models5.3. Flame surface models5.4. Probability Density Function models
6. A priori filtering for turbulent combustion model6.1. Introduction6.2. The a priori filtering method6.3. DNS Preccinsta dataset6.4. Results and discussion6.5. Comparisons for the Thickened Flame model6.6. Conclusions and perspectives
7. Fuel vaporization physics and modeling
8. Supercritical combustion regime at take-off conditions
7. Lean Fully Premixed (LFP) Injector Design
1. Design procedure2. Innovation and concept definition
3. Modeling and sizing3.1. Vaporizing unit3.2. Premixing and premixing-stabilizing units
4. Conclusion
Conclusion and Perspectives
- No. of pages: 400
- Language: English
- Edition: 1
- Published: July 3, 2020
- Imprint: Academic Press
- Paperback ISBN: 9780128199961
- eBook ISBN: 9780128199978
PP
Paul Palies
Paul Palies is Principal Scientist at CFD Research Corporation in Huntsville, Alabama. He is a dedicated aeronautical research scientist and a specialist in propulsion including all aspects of combustion dynamics. He graduated from Ecole Centrale Paris in aerospace and from University of Paris XI in mechanics-physics. He holds a doctorate in combustion from Ecole Centrale Paris. He previously was a senior research scientist at the research center of United Technologies Corporation and worked with Pratt and Whitney’s main combustor team. He has a demonstrated experience in acoustics, combustion and fluid dynamics and is an expert in combustion dynamics applied to laboratory scale combustor and jet engines. He is the reviewer of several international conferences and journals, a full member of the AIAA Propellant and Combustion Technical Committee and the USNC/TAM AIAA Professional Society Representative.
Affiliations and expertise
Principla Scientist, CFD Research Corporation, Huntsville, AL, United States of AmericaRead Stabilization and Dynamic of Premixed Swirling Flames on ScienceDirect