Carbon condensation wave in C3O2 and C2H2 initiated by a shock wave

Emelianov, A. V.; Еремин, А. В.; Jander, H.; Wagner, H. Gg.

doi:10.1016/j.proci.2010.05.103

Cited by 20 publications

(3 citation statements)

References 27 publications

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“…The experiments were carried out behind shock waves in mixtures of carbon suboxide with argon containing 10-30% C 3 O 2 [12][13][14][15]. The temperature and pressure behind the reflected shock wave before chemical transformations (the so-called frozen parameters) were in the ranges 1400-2000 K and 4-9 bar, respectively.…”

Section: Methodsmentioning

confidence: 99%

Chemical Condensation Wave Initiating Oxygen-Free Combustion and Detonation

Emelianov

Еремин

Фортов

2021

Russ. J. Phys. Chem. B

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It is well known that the propagation of traditional combustion and detonation waves was determined by the branched chain reactions discovered by Academician N.N. Semenov. This article discusses a new type of detonation waves initiated by chemical condensation processes. Chemical condensation waves arise as a result of the heat released during the explosive condensation of a highly supersaturated carbon vapor formed as a result of the dissociation of the initial carbon-containing molecules behind the front of the initiating shock wave. Unlike traditional combustion and detonation waves, the mechanism of chemical condensation does not include branched chain reactions; nevertheless, the laws of propagation of detonation waves of condensation are clearly described by the Zel’dovich–Neumann–Döring theory.

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Section: Methodsmentioning

confidence: 99%

Chemical Condensation Wave Initiating Oxygen-Free Combustion and Detonation

Emelianov

Еремин

Фортов

2021

Russ. J. Phys. Chem. B

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“…Acetylene is the most important fuel for studying detonation because of its instability. This fuel can not only detonate when mixed with oxygen, but also form selfsustained detonation in oxygen-free environments [1][2][3], even releasing more energy [4]. Acetylene is a key intermediate in the formation of PAHs (polycyclic aromatic hydrocarbons) during the combustion of hydrocarbon fuels [5] and has its reactive characteristics during the detonation of hydrocarbon fuels.…”

Section: Introductionmentioning

confidence: 99%

“…Emelianov et al [2] experimented with the formation of shock-induced condensation waves of carbon nanoparticles after the self-decomposition of C 2 H 2 . Results show that the reaction C 2 H 2 = H 2 + soot releases a lot of heat and forms self-sustaining condensation waves under high pressure.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Gaseous Detonation Performance and Wall Reflection Effect of Acetylene-Rich Fuel

Gao

Tang

2022

Energies

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The efficient utilization of energy in rich fuel detonation processes and the effective control method of soot are important topics in combustion research. In this paper, we numerically study the detonation wave behavior of acetylene–air systems in rich fuel condition by using a reduced reaction mechanism. The non-stiff terms of the governing equations are solved explicitly using the gas kinetic scheme, and the stiff terms are solved implicitly. Our results show that the acetylene pyrolysis is the dominant reaction process. The oxidation reaction is exploited to initiate the reaction induction process, providing the required energy to overcome the potential energy barrier. The secondary detonation structure is due to the stable interaction of the transverse waves and the combined action of the vinyl reaction system, thus effectively improve the energy release rate and providing a powerful solution for the fuel-rich high-energy release of advanced heat engines. The area of the unreacted pocket increases with the acetylene concentration, resulting in an irregular wave-front and detonation cell. The reflected shock wave impacting on the wall induces the secondary reaction of the detonation products. The concentration of polycyclic aromatic hydrocarbons decreases significantly and regenerates near the wall. Our approach provides an effective tool for controlling detonation soot and the preparation of carbon particles.

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