The Modes of Gaseous Combustion (eBook)

IntroductionSection I.   Propagation of laminar spherical flames Chapter 1.   Flame propagation. Theoretical approaches§1. Influence of chemically active additives on flame .velocity of rich H2 + air mixtures § 2. Concentration limits of combustion in rich hydrogen–air mixtures in the presence of     inhibitors § 3. On the nature of an upper concentration limit of flame propagation in an H2 + air      mixture References Chapter 2.  Flame propagation by spark discharge initiation § 4. Influence of inert additives on the time of formation of steady spherical flame front of mixtures of natural gas and isobutylene with oxygen under spark initiation  § 5. Influence of inert and active additives on the features of initiation and propagation of laminar spherical flames at atmospheric pressure § 6. Numerical investigation of effects of surface recombination and initiation for laminar hydrogen flames at atmospheric pressure § 7. Investigation into regularities of lean hydrogen-air mixtures combustion at atmospheric pressure by means of high-speed cinematography References Chapter 3.  Ignition and flame propagation in heated vessels § 8. Investigation into thermal ignition in chain oxidation of hydrogen, natural gas, and isobutene by means of high-speed color cinematography §9. Investigation into spontaneous ignition of propane-air and n-pentane-air mixtures in heated vessel at atmospheric pressure by means of high-speed color cinematography §10. On the features of the negative temperature coefficient phenomenon in combustion of n-pentane-air mixtures §11. Investigation into spontaneous ignition of hydrogen-air mixtures in a heated reactor at atmospheric pressure by means of high-speed color cinematography References Chapter 4.  Some features of kinetic mechanisms of gaseous combustion § 12. Initiation of hydrogen flame by a local source §13. Various influence of active chemical additives on hydrogen and hydrocarbons combustion References Section  2.  Unsteady gaseous combustion Chapter 1.  Instabilities in gaseous combustion §1.   Flame propagation regimes at combustion of lean hydrogen-air mixtures in the presence of additives at central spark initiation at atmospheric pressure  §2. Cellular combustion at transition of spherical flame front to flat front at initiated ignition of methane-air, methane-oxygen and n-pentane-air mixtures §3. Establishment of some features of propagation of unstable flames by 3D optical spectroscopy and color speed cinematography §4. Acoustic instabilities in hydrogen-air mixtures in the closed reactor at the central spark initiation References Chapter 2. Flame interaction with obstacles §5. Interaction of spherical flames of hydrogen-air and methane-air mixtures in the closed reactor at the central spark initiation with close-meshed obstacles  §6. Interaction of laminar flames of methane-air mixtures with close-meshed spherical and planar obstacles in closed cylindrical reactor at spark discharge initiation  §7. Non-steady propagation of single and counter flames in hydrogen-oxygen and natural gas-oxygen mixtures in closed cylindrical vessels at spark initiation in initially motionless gas §8. Penetration of flames of methane-oxygen mixtures through spherical and planar obstacles in closed cylindrical reactor §9. Interaction of laminar flames of natural gas-oxygen mixtures with planar obstacles, diffusers and confusers References  Section 3. Detonation limits in gaseous systems § 1. Contemporary approaches to the description of supersonic combustion §2. Influence of an acoustic resonator on flame propagation regimes in spark initiated H2 combustion in cylindrical reactor in the vicinity of the lower detonation limit  §3. Influence of small chemical additives on the velocity of detonation wave and the detonation limit in rich hydrogen mixtures References                              Section 4.  The role of disperse phase in combustion processes  Chapter 1.  Phase formation in combustion and pyrolysis §1. Factors determining phase formation in the heterogeneous chain oxidation of dichlorosilane at low pressures                                §2. Formation of liquid and solid dusty crystals in gas-phase combustion reactions by the example of dichlorosilane oxidation §3. Thermal decomposition of dichlorosilane. Formation of threadlike nanostructures of silicon and silicon carbide by means of the method of chemical vapor deposition References Chapter 2.  Features of combustion of coal gas suspensions §4. Features of thermal ignition of coal gas suspensions, containing natural gas and oxygen §5. Thermal ignition of coal powders in the presence of natural gas, oxygen and chemically active additives §6. Investigation into ignition of coal powders in the presence of oxygen and natural gas by means of high-speed cinematography §7. Suppression of ignition of coal powders in the presence of oxygen and natural gas with small additives of vapor of octadecafluorodecahydronaphthalene С10F18 References Final remarks Acknowledgements