Book contents
- Frontmatter
- Summary Contents
- Detailed Contents
- Introduction
- Overview of the Book
- 1 Overview and Basic Equations
- 2 Decomposition and Evolution of Disturbances
- 3 Hydrodynamic Flow Stability I: Introduction
- 4 Hydrodynamic Flow Stability II: Common Combustor Flow Fields
- 5 Acoustic Wave Propagation I – Basic Concepts
- 6 Acoustic Wave Propagation II – Heat Release, Complex Geometry, and Mean Flow Effects
- 7 Flame–Flow Interactions
- 8 Ignition
- 9 Internal Flame Processes
- 10 Flame Stabilization, Flashback, Flameholding, and Blowoff
- 11 Forced Response I – Flamelet Dynamics
- 12 Forced Response II – Heat Release Dynamics
- Index
- Solutions
- References
8 - Ignition
Published online by Cambridge University Press: 05 October 2012
Book contents
- Frontmatter
- Summary Contents
- Detailed Contents
- Introduction
- Overview of the Book
- 1 Overview and Basic Equations
- 2 Decomposition and Evolution of Disturbances
- 3 Hydrodynamic Flow Stability I: Introduction
- 4 Hydrodynamic Flow Stability II: Common Combustor Flow Fields
- 5 Acoustic Wave Propagation I – Basic Concepts
- 6 Acoustic Wave Propagation II – Heat Release, Complex Geometry, and Mean Flow Effects
- 7 Flame–Flow Interactions
- 8 Ignition
- 9 Internal Flame Processes
- 10 Flame Stabilization, Flashback, Flameholding, and Blowoff
- 11 Forced Response I – Flamelet Dynamics
- 12 Forced Response II – Heat Release Dynamics
- Index
- Solutions
- References
Summary
Overview
This chapter describes the processes associated with spontaneous ignition (or auto-ignition) and forced ignition. The forced ignition problem is of significant interest in most combustors, as an external ignition source is almost always needed to initiate reaction. Two examples in which the autoignition problem is relevant for flowing systems are illustrated in Figure 8–1 [1–12]. Figure 8–1(a) depicts the autoignition of high-temperature premixed reactants in a premixing duct. This is generally undesirable and is an important design consideration in premixer design. Figure 8–1(b) depicts the ignition of a jet of premixed reactants by recirculating hot products. In this case, autoignition plays an important role in flame stabilization and must be understood in order to predict the operational space over which combustion can be sustained. Although not shown, autoignition can also occur during the injection of a fuel, air, or premixed reactants jet into a stream of hot fuel, air, or products. For example, a vitiated H2/CO stream reacts with a cross-flow air jet in RQL combustors [13].
Figure 8–2 shows several canonical configurations used to study ignition that are referred to in this chapter. These are (a) the ignition of premixed reactants by hot gases, (b) the ignition of a non-premixed flame by either a hot fuel or air stream or an external spark, and (c) stagnating flow of fuel or premixed reactants into a hot gas stream [14].
- Type
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- Information
- Unsteady Combustor Physics , pp. 225 - 246Publisher: Cambridge University PressPrint publication year: 2012
References
Experimental investigation of the intermediates of isooctane during ignitionInternational Journal of Chemical Kinetics 2007 39 498CrossRefGoogle Scholar
Investigation of auto-ignition of a pulsed methane jet in vitiated air using high-speed imaging techniquesJournal of Engineering for Gas Turbines and Power 2011 133CrossRefGoogle Scholar
Ignition delay characteristics of methane fuelsProgress in Energy and Combustion Science 1994 20 431CrossRefGoogle Scholar
Oxidation and ignition of methane-propane and methane-ethane-propane mixtures – Experiments and modelingCombustion Science and Technology 1994 103 133CrossRefGoogle Scholar
A jet fuel surrogate formulated by real fuel propertiesCombustion and Flame 2010 157CrossRefGoogle Scholar
Prediction of autoignition in a lifted methane/air flame using an unsteady flamelet/progress variable modelCombustion and Flame 2010 1850CrossRefGoogle Scholar
Development of detailed kinetic mechanism to study low temperature ignition phenomenon of keroseneASME Turbo Expo 2005: Power for Land, Sea, and Air 2005 Reno, NVASMEGoogle Scholar
A fiber-optic probe to measure precombustion in-cylinder fuel-air ratio fluctuations in production enginesTwenty-sixth Symposium (International) on Combustion 1996 26 2613CrossRefGoogle Scholar
1998
Fundamental combustion properties of H2/CO mixtures: Ignition and flame propagation at elevated pressuresCombustion Science and Technology 2008 180 1097CrossRefGoogle Scholar
An experimental and modeling study of iso-octane ignition delay times under homogeneous charge compression ignition conditionsCombustion and Flame 2005 142 266CrossRefGoogle Scholar
An experimental investigation of the ignition properties of hydrogen and carbon monoxide mixtures for syngas turbine applicationsProceedings of the Combustion Institute 2007 31 3147CrossRefGoogle Scholar
Gas Turbine Combustion: Alternative Fuels and Emissions 2010 Taylor and FrancisCrossRefGoogle Scholar
Ignition of CO/H2/N2 versus heated air in counterflow: experimental and modeling resultsCombustion and Flame 2000 120 417CrossRefGoogle Scholar
Ignition of turbulent non-premixed flamesProgress in Energy and Combustion Science 2009 35 57CrossRefGoogle Scholar
Effects of H2 enrichment on the propagation characteristics of CH4-air triple flamesCombustion and Flame 2008 153 367CrossRefGoogle Scholar
Spark ignition of turbulent nonpremixed bluff-body flamesCombustion and Flame 2007 151 366CrossRefGoogle Scholar
Chemical kinetics of hydrocarbon ignition in practical combustion systemsProceedings of the Combustion Institute 2000 28 1563CrossRefGoogle Scholar
Measurement of the rate constant for H + O2 + MHO2 + M (M = N2, Ar) using kinetic modeling of the high-pressure H2/O2/NOx reactionTwenty-seventh Symposium (International) on Combustion 1998 27 177CrossRefGoogle Scholar
Explicit reduced reaction models for ignition, flame propagation, and extinction of C2H4/CH4/H2 and air systemsCombustion and Flame 2007 150 71CrossRefGoogle Scholar
The autoignition of C8H10 aromatics at moderate temperatures and elevated pressuresCombustion and Flame 2009 156 1053CrossRefGoogle Scholar
A shock tube study of the ignition of -heptane, -decane, -dodecane, and -tetra-decane at elevated pressuresEnergy and Fuels 2009 23 2482CrossRefGoogle Scholar
Flammability Characteristics of Combustible Gases and Vapors 1965 Bureau of MinesWashington D.CGoogle Scholar
An experimental ignition delay study of alkane mixtures in turbulent flows at elevated pressures and intermediate temperaturesJournal of Engineering for Gas Turbines and Power 2011 133CrossRefGoogle Scholar
Autoignition of propane-air mixtures behind reflected shock wavesProceedings of the Combustion Institute 2005 30 1941CrossRefGoogle Scholar
High-pressure methane oxidation behind reflected shock wavesTwenty-Sixth Symposium (International) on Combustion 1996 26 799CrossRefGoogle Scholar
Ignition of lean methane-based fuel blends at gas turbine pressuresJournal of Engineering for Gas Turbines and Power 2007 129 937CrossRefGoogle Scholar
Autoignition delay time measurements of methane, ethane, and propane pure fuels and methane-based fuel blendsJournal of Engineering for Gas Turbines and Power 2010 132 1CrossRefGoogle Scholar
Some Problems in Chemical Kinetics and Reactivity. Vol. I 1959 Princeton University PressGoogle Scholar
Some Problems in Chemical Kinetics and Reactivity. Vol. II 1959 Princeton University PressGoogle Scholar
Fifteen Lectures on Laminar and Turbulent CombustionERCOFTAC Summer SchoolAachen, Germany 1992Google Scholar
Ignition in nonpremixed counterflowing hydrogen versus heated air: Computational study with detailed chemistryCombustion and Flame 1996 104 157CrossRefGoogle Scholar
Ignition in the viscous layer between counterflowing streams: Asymptotic theory with comparison to experimentsCombustion and Flame 2000 122 339CrossRefGoogle Scholar
Influence of compositional stratification on autoignition in n-heptane/air mixturesCombustion and Flame 2010 158 1064CrossRefGoogle Scholar
Autoignition of turbulent non-premixed flames investigated using direct numerical simulationsCombustion and Flame 2002 128 22CrossRefGoogle Scholar
Ignition of premixed hydrogen/air by heated counterflowProceedings of the Combustion Institute 2002 1637CrossRefGoogle Scholar
2010
On the critical flame radius and minimum ignition energy for spherical flame initiationProceedings of the Combustion Institute 2011 33 1219CrossRefGoogle Scholar
Ignition and flame quenching in flowing gaseous mixturesProceedings of the Royal Society of London. A. Mathematical and Physical Sciences 1977 357 163CrossRefGoogle Scholar
The influence of flow parameters on minimum ignition energy and quenching distanceFifteenth Symposium (International) on Combustion 1975 15 1473CrossRefGoogle Scholar
A general model of spark ignition for gaseous and liquid fuel-air mixturesEighteenth Symposium (International) on Combustion 1981 18 1737CrossRefGoogle Scholar
The interplay of transport, kinetics, and thermal interactions in the stability of premixed hydrogen/air flames near surfacesCombustion and Flame 1995 103 59CrossRefGoogle Scholar
An experimental investigation of flame stabilization in a heated turbulent boundary layer 1958 PhD dissertationCalifornia Institute of TechnologyGoogle Scholar
Thermal-ignition analysis in boundary-layer flowsJournal of Fluid Mechanics 1979 92 97CrossRefGoogle Scholar
Experimental determination of probability density functions within a turbulent high velocity premixed flameEighteenth Symposium (International) on Combustion 1981 18 993CrossRefGoogle Scholar
An experimental study of hydrogen autoignition in a turbulent co-flow of heated airProceedings of the Combustion Institute 2005 30 883CrossRefGoogle Scholar
2005 417
A theoretical study of ignition in the laminar mixing layerJournal of Heat Transfer 1982 104 329CrossRefGoogle Scholar