Unsteady Supersonic Combustion (eBook)
XL, 345 Seiten
Springer Singapore (Verlag)
978-981-15-3595-6 (ISBN)
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.
Prof. Mingbo Sun is the Director of Science and Technology on Scramjet Laboratory at National University of Defense Technology (NUDT) in China. He was awarded a Doctorate in Aerospace Science and Technology from NUDT (2008) and a bachelor's degree in Aerodynamic Engineering from NUDT (2002). His Ph.D. thesis entitled 'Studies on Flow Patterns and Flameholding Mechanisms of Cavity Flameholders in Supersonic Flows' was rated as outstanding doctoral dissertation. He started his research career as a Lecturer at NUDT from 2008 and was promoted to a Professor in Science and Technology on Scramjet Laboratory in 2014. He has been working on experimental and numerical studies of the supersonic flow/combustion in scramjet engines in the past 15 years. He was awarded the National Science Fund for Distinguished Young Scholars for his outstanding research in supersonic combustion. He authored over 100 SCI-indexed journal papers and 16 patents.
Dr. Hongbo Wang is an Associate Professor at National University of Defense Technology (NUDT) in China. He was awarded a Doctorate in Aerospace Science and Technology from NUDT (2012), Master of Science degree in Aerospace Science and Technology from NUDT (2007) and a bachelor's degree in Aerodynamic Engineering from NUDT (2005). He used to be a visiting Ph.D. student in Aerospace Engineering at the University of Sheffield (UK) from 2009 to 2010. His Ph.D. thesis entitled 'Combustion Modes and Oscillation Mechanisms of Cavity-Stabilized Jet Combustion in Supersonic Flows' was rated as outstanding doctoral dissertation. He started his Hypersonic Propulsion Technology research career working as a Lecturer at NUDT from 2012. He conducted research in the areas of scramjet combustor design, supersonic combustion and computational fluid/combustion dynamics. He authored over 50 publications in journals and several patents.
Dr. Zun Cai is a Lecturer at National University of Defense Technology in China. He was awarded a Doctorate in Aerospace Science and Technology from NUDT (2018), Master of Science degree in Aerospace Science and Technology from NUDT (2014) and a bachelor's degree in Aerodynamic Engineering from NUDT (2012). He used to be a visiting Ph.D. student in Computational Fluid Dynamics at the University of Lund (Sweden) from 2015 to 2016, during which he developed a supersonic combustion solver based on the OpenFOAM. His Ph.D. thesis entitled 'Investigation on the Flame Ignition and Stabilization Processes in a Cavity-based Scramjet Combustor with a Rear-wall-expansion Geometry' was rated as outstanding doctoral dissertation. He started his Hypersonic Propulsion Technology research career working as a Lecturer at NUDT from 2018 and conducted research in the areas of scramjet combustor design, supersonic combustion and RBCC propulsion issues. He authored over 20 publications in journals and several patents.
Dr. Jiajian Zhu is an Associate Professor at National University of Defense technology (NUDT) in China. He was awarded a Doctorate in Combustion Physics from Lund University in Sweden (2015) and a bachelor's degree in Opto-electronic Engineering from NUDT in China (2009). He was employed as a Lecturer by the Science and Technology on Scramjet Laboratory, NUDT, in 2015 and promoted to an Associate Professor in 2018. His present research focus is supersonic combustion and laser-based combustion diagnostics. He was supported by the Huxiang Youth Talent Program and co-authored over 40 journal publications.
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.
Preface 7
Acknowledgements 9
Contents 10
About the Authors 14
Nomenclature 16
List of Figures 20
List of Tables 37
1 Introduction 39
1.1 Interactions Between Acoustic Wave and Flame 40
1.1.1 Fundamentals of the Coupling Between Acoustic Wave and Combustion Process 41
1.1.2 Classification of Combustion Instability Related to Acoustic Wave 43
1.1.3 Acoustic Induced Combustion Instabilities in Supersonic Flows 46
1.1.4 Summary 49
1.2 Flow Dominating Instability 49
1.2.1 Low-Frequency Unsteadiness of Shock Wave/Turbulent Boundary Layer Interaction 49
1.2.2 Unsteadiness of Shock-Induced Separation in Non-reacting Flow 52
1.2.3 Unsteady Combustion Dominated by Flow Instability 56
1.2.4 Summary 60
1.3 Ignition 60
1.3.1 Basic Concepts for the Forced Ignition 60
1.3.2 Effects of the Forced Ignition Methods 62
1.3.3 Effects of Auto-Ignition 67
1.3.4 Summary 70
1.4 Flame Flashback 70
1.4.1 Flashback Due to DDT (Deflagration–Detonation Transition) 70
1.4.2 Flashback Due to Boundary Layer Separation 71
1.4.3 Flashback Due to Thermal Choking and Acoustic Instabilities 76
1.4.4 Summary 76
1.5 Combustion Near Blowout Limits 78
1.5.1 Blowout Limits 78
1.5.2 Combustion Behaviors Near Blowout Limits 80
1.5.3 Summary 82
1.6 Discussion 83
References 85
2 Acoustic Oscillation in Supersonic Combustor 94
2.1 High Frequency Acoustic Oscillations of Cavity 94
2.1.1 Characteristics of Oscillations in Supersonic Cavity Flows 94
2.1.2 Characteristics of Oscillations in Supersonic Cavity Combustion 107
2.2 Low Frequency Acoustic Oscillation 121
2.2.1 Effect of Cavity Parameters on the Acoustic Oscillation 122
2.2.2 Effect of Mixing Status on the Acoustic Oscillation 131
2.2.3 Numerical Analysis on Acoustic Oscillation 136
2.3 Summary 147
References 148
3 Flow Dominating Instability in Supersonic Flows 150
3.1 Asymmetric and Dynamic Combustion Behaviors in Strong Separated Flows 150
3.1.1 Experimental Setup and Numerical Methodology for High-Temperature Cases 151
3.1.2 Combustion Characteristics Under Different Equivalence Ratios 153
3.1.3 Dynamic Combustion Under Intermediate Heat Release 156
3.2 Decoupling Analysis of the Unsteady Combustion 160
3.2.1 Impact Factors of the Separation Dominating Unsteady Combustion 162
3.2.2 Dynamic Behaviors in High-Temperature Separated Flow Induced by Backpressure 168
3.3 Cold Flow Analysis: Asymmetric Separation Induced by Boundary Layer Transformation 172
3.3.1 Experimental Setup and Numerical Methodology for Cold Flow Cases 173
3.3.2 Backpressure Induced Symmetric and Asymmetric Separated Flowfield 176
3.3.3 Mechanism of Asymmetric Separation Based on Boundary Layer Study 182
3.4 Cold Flow Analysis: Separation Transition and Low-Frequency Unsteadiness 185
3.4.1 Symmetric/Asymmetric Separation Transition Under Threshold Backpressure 186
3.4.2 Mechanism of Separation Pattern Transition 193
3.4.3 Low-Frequency Unsteadiness in the Separated Flowfield 197
3.4.4 Control of Unsteadiness 201
3.5 Validation on Reactive Flows with Different Geometry 204
3.5.1 Experimental Facility 204
3.5.2 Variation of Combustion Modes Under Different Equivalence Ratios 206
3.5.3 Quantitative Descriptions of Unsteady Combustion 208
3.6 Summary 211
References 211
4 Cavity Ignition in Supersonic Flows 214
4.1 Ignition Processes Under Different Ignition Methods 214
4.1.1 Spark Ignition 215
4.1.2 Piloted Ignition 216
4.1.3 Gliding-Arc-Discharge (GAD) Ignition 219
4.1.4 Laser-Induced Plasma (LIP) Ignition 220
4.2 Flame Behaviors During Ignition 223
4.2.1 Experimental and Numerical Setups 223
4.2.2 Formation of the Flame Kernel 228
4.2.3 Flame Propagation in the Single-Cavity Supersonic Combustor 231
4.2.4 Flame Propagation in the Multi-cavity Supersonic Combustor 234
4.3 Ignition Mechanism Analysis 244
4.3.1 Experimental and Numerical Setups 245
4.3.2 Four-Stages Dominated Ignition Process 248
4.3.3 Ignition Modes 259
4.4 Auto-Ignition Effects 266
4.4.1 Experimental Setup 266
4.4.2 Auto-Ignition in the Ignition Process 268
4.5 Summary 271
References 273
5 Flame Flashback in Supersonic Flows 277
5.1 Flame Flashback Phenomenon in a Flight Mach 4 Condition 277
5.1.1 Flashback Flame in a Single-Side Expansion Scramjet Combustor 277
5.1.2 Injection Parametric Study in a Single-Side Expansion Scramjet Combustor 283
5.2 Flame Flashback Phenomenon in a Flight Mach 5.5 Condition 294
5.2.1 Experimental Investigations on Flame Flashback 295
5.2.2 Numerical Investigations of Flame Flashback 316
5.2.3 Theoretical Analyses 331
5.3 Summary 338
References 339
6 Flame Behaviors Near Blowoff in Supersonic Flows 342
6.1 Blowoff Limits of Supersonic Combustion 342
6.1.1 Physical Interpretation of Blowoff Limits 342
6.1.2 Modeling of Blowoff Limits 344
6.2 Mixing and Combustion Characteristics Near Blowoff 346
6.2.1 Interpretation of Blowoff Limits 349
6.2.2 Mixing Characteristics 350
6.2.3 Combustion Characteristics 354
6.3 Near Blowoff Flame Dynamics 360
6.3.1 Non-premixed Flame 361
6.3.2 Premixed Flame 363
6.4 Summary 378
References 379
| Erscheint lt. Verlag | 14.4.2020 |
|---|---|
| Zusatzinfo | XL, 345 p. 317 illus., 285 illus. in color. |
| Sprache | englisch |
| Themenwelt | Mathematik / Informatik ► Mathematik ► Angewandte Mathematik |
| Naturwissenschaften ► Physik / Astronomie ► Strömungsmechanik | |
| Technik ► Bauwesen | |
| Technik ► Fahrzeugbau / Schiffbau | |
| Technik ► Luft- / Raumfahrttechnik | |
| Technik ► Maschinenbau | |
| Schlagworte | Acoustic Oscillation • Blowoff Limits • Cavity • flame flashback • Flow structures • Flow Unsteadiness • fluid- and aerodynamics • Ignition • supersonic flow • Unsteady Combustion |
| ISBN-10 | 981-15-3595-7 / 9811535957 |
| ISBN-13 | 978-981-15-3595-6 / 9789811535956 |
| Haben Sie eine Frage zum Produkt? |
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