Investigation of Gas Detonation in Over-Rich Mixtures of Hydrocarbons with Oxygen

Batraev, Igor S.; Васильев, А. А.; Ul’yanitskii, V. Yu.; Штерцер, А. А.; Rybin, Denis K.

doi:10.1134/s0010508218020107

Cited by 24 publications

(11 citation statements)

References 5 publications

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“…Для иллюстрации возможностей сформулированной математической модели и сопоставления с экспериментальными данными были проведены расчеты параметров детонации ацетиленокислородной смеси T m = 4 130 К (curve 1), 3 600 K (curve 2), 3 100 K (curve 3). The dots illustrate experimental data [5] Здесь же на рис. 1 приведены данные измерения скорости фронта детонации в переобогащенных ацетиленом смесях с кислородом [5].…”

Section: расчеты параметров детонацииunclassified

“…The dots illustrate experimental data [5] Здесь же на рис. 1 приведены данные измерения скорости фронта детонации в переобогащенных ацетиленом смесях с кислородом [5]. Видно, что экспериментальные точки близки к участку кривой 1 (при 0.5 0.56 n …”

Section: расчеты параметров детонацииunclassified

“…Для этого был использован вычислительный алгоритм [8], частично совпадающий с методами расчета равновесных течений газообразных продуктов сгорания углеводородных топлив [9]. Сопоставление расчетов с экспериментальными измерениями скорости фронта детонации в [5] показало, что численное решение в обоих случаях существенно отличается от опытных данных. Экспериментальные точки располагаются примерно посередине между расчетными кривыми на графике и расхождения в значениях скорости детонационного фронта достигают более 10 %.…”

Section: Introductionunclassified

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Melting Point of Carbon Particles behind the Gas Detonation Front

Prokhorov

2022

jour

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A mathematical model of gas detonation of fuel-enriched mixtures of hydrocarbons with oxygen has been formulated, which makes it possible to numerically study the equilibrium flows of detonation products in the presence of free carbon condensation. Reference data for graphite were used to describe the thermodynamic properties of carbon condensate. The calculations are compared with the known results of experimental studies in which, when detonating an acetylene-oxygen mixture in a pipe closed at one end, it is possible to obtain nanoscale particles from a carbon material with special properties. It is assumed that the melting point of such a material is lower than that of graphite and is about 3100 K. Only with such an adjustment of the melting temperature, the best agreement (with an accuracy of about 3 %) was obtained between the calculated and experimental dependence of the detonation front velocity on the molar fraction of acetylene in the mixture.

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Section: расчеты параметров детонацииunclassified

Section: Introductionunclassified

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Melting Point of Carbon Particles behind the Gas Detonation Front

Prokhorov

2022

jour

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“…However, the explosive mixtures can detonate even at low contents of the oxidizer. In these cases, the products of detonation contain different forms of nanocarbon [48][49][50][51][52]. For example, the acetylene-oxygen mixture detonates producing solid carbon when parameter k changes from 0.11 to 0.70.…”

Section: Formation Of Carbon and Carbon-containing Phases In The Coatmentioning

confidence: 99%

Computer-Controlled Detonation Spraying: Flexible Control of the Coating Chemistry and Microstructure

Ulianitsky

Dudina

Штерцер

et al. 2019

Metals

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This article is a focused review aimed to describe the potential of the computer-controlled detonation spraying (CCDS) for producing and designing coatings with variable chemical and phase compositions and microstructure and promising properties. The development of the detonation spraying method is briefly analyzed from a historical perspective and the capabilities of the state-of-the art facilities are presented. A key advantage of the CCDS is the possibility of using precisely measured quantities of the explosive gaseous mixtures for each shot of the detonation gun and different oxygen to fuel ratios, which can create spraying environments of different chemical properties—from severely oxidizing to highly reducing. The significance of careful adjustment of the spraying parameters is shown using material systems that are chemically sensitive to the composition of the spraying environment and temperature. Research performed by the authors on CCDS of different materials—metals, ceramics, intermetallics and metal-ceramic composites is reviewed. Novel applications of detonation spraying using the CCDS technology are described.

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“…Recently, much attention is paid to the detonation (explosive) combustion of mixtures based on acetylene and other gaseous types of fuel due to deficiency of oxydizer (oxygen or air) since such a way of hydrocarbon combustion yields the formation of nanoscale carbon condensate with special properties [1,2] in detonation products. The pulsed gas-detonation apparatus, which was developed on the basis of a computerized complex for applying powder coatings (detonation spraying) [3], opens up new opportunities for its production. This apparatus, operating in automatic (cyclic) mode, uses a flow supply of gases to the reaction chamber (detonation tube) at atmospheric pressure, which ensures high performance and safety of this method.…”

Section: Introductionmentioning

confidence: 99%

On melting temperature of carbon produced in detonation combustion of acetylene

Prokhorov

2022

J. Phys.: Conf. Ser.

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A mathematical model of gas detonation of over-riched hydrocarbon-oxygen mixtures has been formulated. The model implies numerical studying the equilibrium flows of detonation products provided that there is condensation of free carbon. To describe thermodynamic properties of carbon condensate, reference data for graphite have been used. The calculations have been compared with the known results of experimental research, in which the detonation of acetylene-oxygen mixture in a tube with one closed end results in nanoscale particles of carbon material with special properties. We assumed that melting temperature of such a material, which is about 3100 K, is lower than that of graphite. Only such a way of correcting melting temperature yields the best agreement (with accuracy of about 3%) between calculation and experimental dependence of detonation front velocity on molar fraction of acetylene in the mixture.

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Investigation of Gas Detonation in Over-Rich Mixtures of Hydrocarbons with Oxygen

Cited by 24 publications

References 5 publications

Melting Point of Carbon Particles behind the Gas Detonation Front

Melting Point of Carbon Particles behind the Gas Detonation Front

Computer-Controlled Detonation Spraying: Flexible Control of the Coating Chemistry and Microstructure

On melting temperature of carbon produced in detonation combustion of acetylene

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