1 Introduction 1
Motivation to Study Combustion 1
A Definition of Combustion 6
Combustion Modes and Flame Types 6
Approach to Our Study 8
References 8
2 Combustion and Thermochemistry 9
Overview 9
Review of Property Relations 9
Extensive and Intensive Properties 9
Equation of State 10
Calorific Equations of State 11
Ideal-Gas Mixtures 13
Latent Heat of Vaporization 15
First Law of Thermodynamics 16
First Law—Fixed Mass 16
First Law—Control Volume 17
Reactant and Product Mixtures 18
Stoichiometry 18
Absolute（or Standardized）Enthalpy and Enthalpy of Formation 24
Enthalpy of Combustion and Heating Values 27
Adiabatic Flame Temperatures 32
Chemical Equilibrium 36
Second-Law Considerations 36
Gibbs Function 38
Complex Systems 44
Equilibrium Products of Combustion 45
Full Equilibrium 45
Water-Gas Equilibrium 47
Pressure Effects 51
Some Applications 52
Recuperation and Regeneration 52
Flue-（or Exhaust-）Gas Recirculation 58
Summary 66
Nomenclature 66
References 68
Review Questions 69
Problems 70
Appendix 2A—Some Fuel Chemistry 78
3 Introduction to Mass Transfer 83
Overview 83
Rudiments of Mass Transfer 83
Mass Transfer Rate Laws 84
Species Conservation 90
Some Applications of Mass Transfer 92
The Stefan Problem 92
Liquid-Vapor Interface Boundary Conditions 94
Droplet Evaporation 98
Summary 105
Nomenclature 105
References 107
Review Questions 107
Problems 108
4 Chemical Kinetics 111
Overview 111
Global versus Elementary Reactions 112
Elementary Reaction Rates 113
Bimolecular Reactions and Collision Theory 113
Other Elementary Reactions 118
Rates of Reaction for Multistep Mechanisms 119
Net Production Rates 119
Compact Notation 121
Relation between Rate Coefficients and Equilibrium Constants 122
Steady-State Approximation 125
The Mechanism for Unimolecular Reactions 126
Chain and Chain-Branching Reactions 127
Chemical Time Scales 133
Partial Equilibrium 138
Summary 140
Nomenclature 140
References 141
Questions and Problems 143
5 Some Important Chemical Mechanisms 148
Overview 148
The H2-O2 System 148
Carbon Monoxide Oxidation 152
Oxidation of Higher Paraffins 153
General Scheme 153
Global and Quasi-global Mechanism 156
Methane Combustion 158
Complex Mechanism 158
High-Temperature Reaction Pathway Analysis 158
Low-Temperature Reaction Pathway Analysis 166
Oxides of Nitrogen Formation 168
Summary 171
References 172
Questions and Problems 174
6 Coupling Chemical and Thermal Analyses of Reacting Systems 178
Overview 178
Constant-Pressure， Fixed-Mass Reactor 179
Application of Conservation Laws 179
Reactor Model Summary 182
Constant-Volume，Fixed-Mass Reactor 182
Application of Conservation Laws 182
Reactor Model Summary 183
Well-Stirred Reactor 189
Application of Conservation Laws 190
Reactor Model Summary 192
Plug-Flow Reactor 200
Assumptions 200
Application of Conservation Laws 201
Applications to Combustion System Modeling 205
Summary 206
Nomenclature 206
References 208
Problems and Projects 209
Appendix 6A—Some Useful Relationships among Mass Fractions，Mole Fractions，Molar Concentrations，and Mixture Molecular Weights 214
7 Simplified Conservation Equations for Reacting Flows 215
Overview 215
Overall Mass Conservation（Continuity） 216
Species Mass Conservation（Species Continuity） 218
Multicomponent Diffusion 221
General Formulations 222
Calculation of Multicomponent Diffusion Coefficients 223
Simplified Approach 226
Momentum Conservation 229
One-Dimensional Forms 229
Two-Dimensional Forms 230
Energy Conservation 234
General One-Dimensional Form 234
Shvab-Zeldovich Forms 236
Useful Form for Flame Calculations 240
The Concept of a Conserved Scalar 241
Definition of Mixture Fraction 241
Conservation of Mixture Fraction 242
Conserved Scalar Energy Equation 246
Summary 247
Nomenclature 248
References 249
Review Questions 250
Problems 251
8 Laminar Premixed Flames 253
Overview 253
Physical Description 254
Definition 254
Principal Characteristics 254
Typical Laboratory Flames 256
Simplified Analysis 261
Assumptions 262
Conservation Laws 262
Solution 264
Detailed Analysis 269
Governing Equations 269
Boundary Conditions 270
Structure of CH4-Air Flame 271
Factors Influencing Flame Velocity and Thickness 274
Temperature 274
Pressure 277
Equivalence Ratio 278
Fuel Type 278
Flame Speed Correlations for Selected Fuels 278
Quenching，Flammability，and Ignition 283
Quenching by a Cold Wall 284
Flammability Limits 289
Ignition 291
Flame Stabilization 294
Summary 298
Nomenclature 299
References 300
Review Questions 302
Problems 302
9 Laminar Diffusion Flames 305
Overview 305
Nonreacting Constant-Density Laminar Jet 306
Physical Description 306
Assumptions 307
Conservation Laws 308
Boundary Conditions 308
Solution 309
Jet Flame Physical Description 314
Simplified Theoretical Descriptions 317
Primary Assumptions 318
Basic Conservation Equations 318
Additional Relations 319
Conserved Scalar Approach 320
Various Solutions 327
Flame Lengths for Circular-Port and Slot Burners 331
Roper’s Correlations 331
Flowrate and Geometry Effects 336
Factors Affecting Stoichiometry 336
Soot Formation and Destruction 343
Counterflow Flames 347
Mathematical Description 348
Structure of CH4-Air Flame 350
Summary 354
Nomenclature 354
References 356
Review Questions 359
Problems 359
10 Droplet Evaporation and Burning 362
Overview 362
Some Applications 362
Diesel Engines 363
Gas-Turbine Engines 365
Liquid-Rocket Engines 367
Simple Model of Droplet Evaporation 367
Assumptions 370
Gas-Phase Analysis 372
Droplet Lifetimes 375
Simple Model of Droplet Burning 378
Assumptions 379
Problem Statement 380
Mass Conservation 381
Species Conservation 381
Energy Conservation 383
Summary and Solution 389
Burning Rate Constant and Droplet Lifetimes 391
Extension to Convective Environments 395
Additional Factors 398
One-Dimensional Vaporization-Controlled Combustion 399
Physical Model 399
Assumptions 401
Mathematical Problem Statement 401
Analysis 402
Model Summary 410
Summary 410
Nomenclature 413
References 415
Problems 418
Projects 420
Appendix 10A—Sir Harry R. Ricardo’s Description of Combustion in Diesel Engines 421
11 Introduction to Turbulent Flows 423
Overview 423
Definition of Turbulence 424
Length Scales in Turbulent Flows 427
Four Length Scales 427
Turbulence Reynolds Numbers 430
Analyzing Turbulent Flows 434
Reynolds Averaging and Turbulent Stresses 435
The Closure Problem 437
Axisymmetric Turbulent Jet 441
Beyond the Simplest Model 444
Summary 445
Nomenclature 446
References 447
Questions and Problems 449
12 Turbulent Premixed Flames 450
Overview 450
Some Applications 450
Spark-Ignition Engines 450
Gas-Turbine Engines 451
Industrial Gas Burners 452
Definition of Turbulent Flame Speed 454
Structure of Turbulent Premixed Flames 456
Experimental Observations 456
Three Flame Regimes 457
Wrinkled Laminar-Flame Regime 462
Distributed-Reaction Regime 466
Flamelets-in-Eddies Regime 468
Flame Stabilization 470
Bypass Ports 470
Burner Tiles 471
Bluff Bodies 471
Swirl or Jet-Induced Recirculating Flows 473
Summary 474
Nomenclature 475
References 476
Problems 478
13 Turbulent Nonpremixed Flames 481
Overview 481
Jet Flames 484
General Observations 484
Simplified Analysis 489
Flame Length 495
Flame Radiation 501
Liftoff and Blowout 504
Other Configurations 509
Summary 512
Nomenclature 513
References 514
Review Questions 517
Problems 517
14 Burning of Solids 519
Overview 519
Coal-Fired Boilers 520
Heterogeneous Reactions 520
Burning of Carbon 522
Overview 523
One-Film Model 524
Two-Film Model 536
Particle Burning Times 542
Coal Combustion 544
Other Solids 545
Summary 545
Nomenclature 546
References 547
Questions and Problems 548
15 Pollutant Emissions 550
Overview 550
Effects of Pollutants 551
Quantification of Emissions 553
Emission Indices 553
Corrected Concentrations 555
Various Specific Emission Measures 558
Emissions from Premixed Combustion 559
Oxides of Nitrogen 559
Carbon Monoxide 567
Unburned Hydrocarbons 568
Catalytic Aftertreatment 569
Particulate Matter 571
Emissions from Nonpremixed Combustion 572
Oxides of Nitrogen 573
Unburned Hydrocarbons and Carbon Monoxide 584
Particulate Matter 586
Oxides of Sulfur 586
Summary 587
Nomenclature 588
References 589
Questions and Problems 594
16 Detonations 598
Overview 598
Physical Description 598
Definition 598
Principal Characteristics 599
One-Dimensional Analysis 600
Assumptions 600
Conservation Laws 601
Combined Relations 602
Detonation Velocities 609
Structure of Detonation Waves 613
Summary 617
Nomenclature 618
References 619
Problems 620
Appendix A Selected Thermodynamic Properties of Gases Comprising C—H—O—N System 621
Appendix B Fuel Properties 648
Appendix c Selected Properties of Air，Nitrogen，and Oxygen 653
Appendix D Binary Diffusion Coefficients and Methodology for their Estimation 656
Appendix E Generalized Newton’s Method for the Solution of Nonlinear Equations 659
Appendix F Computer Codes for Equilibrium Products of Hydrocarbon—Air Combustion 662
Index 665