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This book provides an analysis of contemporary problems in combustion science, namely flame propagation, detonation and heterophaseous combustion based on the works of the author. The current problems in the area of gas combustion, as well as the methods allowing to calculate and estimate limiting conditions of ignition, and flame propagation on the basis of experimental results are considered. The book focuses on the virtually inaccessible works of Russian authors and will be useful for experienced students and qualified scientists in the area of experimental studies of combustion processes.

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Introduction

Section I. Propagation of laminar spherical flames

Chapter 1. Flame propagation. Theoretical approaches

1. Influence of chemically active additives on flame .velocity of rich H 2 + 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 H 2 + 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 a
t 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 instabi
lities 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 confu
sers

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

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