Персона:
Копылов, Сергей Николаевич

Организационные подразделения

Организационная единица

Институт лазерных и плазменных технологий

Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.

Фамилия

Копылов

Имя

Сергей Николаевич

Полная страница элемента

Результаты поиска

Теперь показываю 1 - 10 из 14

Только метаданные
Characteristics of the Development of a Chain Thermal Explosion when Burning Gas Mixtures under Atmospheric Pressure
(2020) Kopylov, P. S.; Eltyshev, I. P.; Kopylov, S. N.; Gubina, T. V.; Копылов, Сергей Николаевич; Губина, Татьяна Валентиновна
© 2020, Pleiades Publishing, Ltd.Abstract: An experimental study of the features of the critical transition between two kinetic combustion regimes of gas-air mixtures reacting by a chain mechanism is carried out. The presence of two radically different combustion modes is experimentally confirmed by the example of the combustion of propane–air mixtures, both containing an inhibitor (trifluoromethane) and without it, and in complete agreement with the predictions of the theory of A chain thermal explosion (CTE). It is shown that the pattern observed in this work is characteristic not only for slow-burning but also for fast-burning gas mixtures of various compositions. The two distinct and radically different regions observed on the pressure–time variation curve during the combustion of gas mixtures are a manifestation of the general laws which combustible gas mixtures reacting by the chain mechanism follow in a wide range of pressures. It is found that fluorine-containing hydrocarbon is capable of induced oxidation in rich combustible gas mixtures. Trifluoroethane CF3H has an inhibitory effect on the chain combustion process of the propane–air mixture before it enters the CTE and promotes combustion in the CTE mode. If the transition to the CTE is not possible during the propane–air mixture combustion, the fluorinated agent has only an inhibitory effect on combustion.
Только метаданные
Effect of Oxidation of Fluorohydrocarbons and Fluorocarbons on Their Characteristics as Gas Combustion Suppressing Agents
(2019) Kopylov, S. N.; Gubina, T. V.; Копылов, Сергей Николаевич; Губина, Татьяна Валентиновна
The combustion of some fluorohydrocarbons (FHCs) and fluorocarbons (FCs) in oxygen was studied in a closed vessel at initially room temperature and atmospheric pressure. The chemical mechanism of oxidation of these compounds was discussed. To improve the characteristics of fluorinated compounds as gas combustion suppressing agents, an oxidation inhibitor should be introduced in them. After the addition of C3H8, C4H10, and C3H6 to the fluorinated compound, its minimum phlegmatizing concentration (MPC) for methane-air mixtures significantly decreased.
Только метаданные
The Role of Radicals in the Conversion of Trifluoromethane in the Flame of Methane–Oxygen Mixtures
(2023) Kopylov, S. N.; Kopylov, P. S.; Eltyshev, I. P.; Begishev, I. R.; Копылов, Сергей Николаевич
Только метаданные
Trifluoromethane Destruction Mechanism in Methane-Oxygen Flame
(2023) Kopylov, S. N.; Kopylov, P. S.; Eltyshev, I. P.; Begishev, I. R.; Копылов, Сергей Николаевич
Только метаданные
Assessment of Carbon Dioxide Emissions due to Forest Fires in Russia and Possible Ways to Reduce Them
(2022) Kopylov, N. P.; Strizhak, P. A.; Bukhtoyarov, D. V.; Kopylov, S. N.; Копылов, Сергей Николаевич
© 2022 Institute of Physics Publishing. All rights reserved.Calculations of CO2 emissions into the atmosphere caused by forest fires in Russia as well as an experimental assessment of some possibilities to reduce the emissions were carried out. It was shown that calculations with the usage of the average values of the reserves of combustible forest materials (CFM), the area of fires and the value of the mass rate of wood burning gives the same results as the approach based on the relatively accurate data on the reserves of CFM and their distribution over the fire area as well as an information on the character of forest fires. It was obtained experimentally that the continuous short-term supply of sprayed extinguishing liquid does not reduce but increases the yield of carbon dioxide due to the earlier termination of the flame burning and transition of the process to the smoldering regime. It is possible to reduce CO2 emissions into the atmosphere caused by forest fires up to 3-5 times when the extinguishing liquid is sprayed by applying two short-term pulses to eliminate both flaming and smoldering combustion.
Только метаданные
Effect of the State of the Reactor Surface on the Characteristics of Combustion of Gas Mixtures Containing Halogen-Substituted Hydrocarbons
(2023) Kopylov, S. N.; Kopylov, P. S.; Eltyshev, I. P.; Begishev, I. R.; Копылов, Сергей Николаевич
Только метаданные
Laboratory and Bench Methodology to Test Fire Suppressant Effectiveness in Aviation Method of Extinguishing of Forest Fires
(2022) Kopylov, N. P.; Strizhak, P. A.; Kopylov, S. N.; Kuznetsov, A. E.; Yu Sushkina, E.; Копылов, Сергей Николаевич
Laboratory and bench tests for evaluation of fire retaining and fire extinguishing properties of agents used for fighting forest fires are described. The methodology gives not only a possibility to understand the effectiveness of the agents themselves but also to determine the characteristics of their discharge from an aircraft, in particular, the length and width of the wetted strip, the irrigation density and the flight altitude. Laboratory experiments confirm high fire retaining efficiency of aqueous solutions of magnesium halides and diammonium phosphate which cause significant delay in ignition time and substantial increase in ignition temperature for wood treated with these solutions. The efficiency of the halides significantly increases in the row MgCl2 < MgBr2 < MgI2. It was also shown by the experiments that the irrigation density by aqueous solutions necessary to extinguish grassroots and crown forest fires decreases when using Firex wetting agent and increases for bischofite and bentonite. © Published under licence by IOP Publishing Ltd.
Только метаданные
Highly Effective Fire Extinguishing Mixtures of Iodinated and Fluorinated Hydrocarbons as a Way to Reduce Greenhouse Gas Emissions into the Atmosphere
(2021) Kopylov, P. S.; Eltyshev, I. P.; Kopylov, N. P.; Begishev, I. R.; Kopylov, S. N.; Копылов, Сергей Николаевич
© Published under licence by IOP Publishing Ltd.One of possible ways to reduce the volume of the use of hydrofluorocarbons (HFCs) as gaseous fire suppressants is studied in the paper. Extinguishing mixtures of HFCs and some fluoroiodocarbons are investigated. It is theoretically predicted that fluoroiodohydrocarbons are effective inhibitors of conversion of fluorinated alkanes in a flame. Special experimental equipment allowing to measure fire extinguishing concentration of gaseous fire suppressant having high boiling point is described. Experiments show that fluoroiodohydrocarbons are effective means of reducing the use of gaseous fire extinguishing agents based on fluorinated alkanes, which are greenhouse gases: in the presence of insignificant addition of iodized substance the volume of fluorinated alkanes required for the extinguishing decreases several times. Creation of mixtures with the content of iodized components higher than 5 mass. is impractical because in this case the iodine-containing substance will exceed safe level of its use from the point of view of toxicity.
Только метаданные
CALCULATION OF CHARACTERISTICS OF A FIRE-EXTINGUISHING AEROSOL GENERATOR AND HIGH-PRESSURE SPRAY FOR EXTINGUISHING OIL AND GAS FOUNTAINS
(2024) Kozlova, E. V.; Kartashov E. Y.; Kopylov, S. N.; Rogozhina, O. I.; Копылов, Сергей Николаевич
Только метаданные
Assessment of the Behavior of Fire-Proof Coatings in the Temperature Field From –162 to +1300°C Formed During Accidents Involving Liquefied Natural Gas
(2025) Kopylov, P.S.; Kopylov, S. N.; Eltyshev, I. P.; Pekhotikov, A. V.; Копылов, Сергей Николаевич