Персона:
Сумской, Сергей Иванович

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.

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Сумской

Имя

Сергей Иванович

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Теперь показываю 1 - 10 из 18

Только метаданные
Simulation of Pressure Waves During Deflagration Combustion of Clouds of Fuel-Air Mixtures
(2024) Sumskoi,S.I.; Zaynetdinov,S.Kh.; Sofyin,A.S.; Lisanov,M.V.; Сумской, Сергей Иванович
Только метаданные
On some differences in the methodological approaches when modeling the parameters of pressure waves from combustion and detonation of fuel-air mixtures clouds
(2020) Agapov, A. A.; Safonov, V. S.; Shvyryaev, A. A.; Sumskoy, S. I.; Сумской, Сергей Иванович
© 2020, STC Industrial Safety CJSC. All rights reserved.The main regularities of the formation of shock air waves and air compression waves during combustion or detonation of fuel-air clouds are briefly considered in the article. Specific features are discussed related to the mathematical model of fuel-air mixture explosion, which is used in the Methodology for determining the calculated values of fire risk at the production facilities. The considered Methodology uses the same mathematical model as the corresponding Safety Guide on the assessment of the emergency explosion consequences approved by Rostechnadzor with some differences that are discussed in the article. The approach of the Methodology is based on the consideration of one-dimensional pressure waves that are formed in the atmosphere during detonation or turbulent combustion of spherical uniformly mixed clouds. For such processes the approximate dependences of pressure on the distance are built. The validity, accuracy, as well as the field of application of such dependencies are considered in the work. The conclusion is made about sufficient accuracy of the used dependencies and their good compliance to the current analogues and experiments, the provisions establishing the field of application of the extrapolation formulas for deflagration combustion are missing in the Methodology text. Due to this reason when calculating the situations are possible that at the same distance from the place of explosion of the clouds of fuel-air mixtures the pressure on the front of the detonation wave is significantly less (up to 7 times) than at the front of the deflagration waves. For deflagration combustion rates considered in the Methodology (up to 500 m/s), this result is incorrect. The reasons for this discrepancy are shown in the article. In Russia the Methodology is approved as the only document on which basis the fire risk indices are calculated, which in turn are one of the main criteria for making managerial decisions in the design and construction of industrial and social objects. It is shown that considered in the article specific features of the numerical explosion models of fuel-air mixtures cloud lead not always to the justified increase of the conservatism of the obtained results. It is noted that the indicated conservatism can be deleted by introducing appropriate limitations on the field of application of the corresponding approximations.
Только метаданные
Updating Safety Guides in the Field of Accident Risk Assessment at the Production Facilities
(2023) Lisanov, M. V.; Agapov, A. A.; Zainetdinov, S. K.; Sumskoy, S. I.; Сумской, Сергей Иванович
Только метаданные
Recording of the cavitation phenomena when modeling flows in the trunk pipelines
(2020) Sverchkov, A. M.; Sumskoy, S. I.; Сумской, Сергей Иванович
© 2020, STC Industrial Safety CJSC. All rights reserved.In the article, it is proposed to use a numerical method based on the approach of S.K. Godunov to simulate boiling in a pipeline. The paper presents a statement of the real problem of modeling a water hammer, considering possible boiling of the transpor-ted liquid on a real object — an oil pipeline. When solving the problem, two variants of flow modeling when closing the valve installed at the end of the pipeline were carried out. In the first case, the possibility of liquid boiling was not considered. In the second case, this opportunity was considered. The performed numerical simulation showed that in the pipeline in emergency situations, liquid columns can be formed, sepa-rated by the cavitation zones and oscillating in different phases, respectively, at the collapse of the cavitation zones, which serve as a kind of pressure dampers, the collisions of liquid columns occur, which can lead, depending on the ratio of velocities, to hydraulic shocks that occur not on the valves, but on the linear part of the pipeline (local hydraulic shocks). The waves from these collapses, interacting with each other, create the new pressure peaks that do not coincide with the pattern of simple wave circulation, which are predicted in the simulations that do not consider possible liquid boiling. As a result, the pressures reached in the pipeline during fluid hammer is significantly different from what it would be in the absence of boiling. When boiling is considered, the maximum reached pressures are 40 % higher. Moreover, this excess is repe-ated. The detailed analysis of the pressure profile in the pipeline is given in the article. Based on the results of solving this prob-lem, it is concluded that when modeling pre–emergency and emergency situations in the pipeline, it is necessary to consider the process of possible liquid boiling, since sometimes, as in the presented case, the values of the pressure surges can be higher than the values of the pressure surges in the liquid without considering boiling, which increases the likelihood of emergency depressurization.
Только метаданные
Ignition, Combustion, and Detonation of Gas-Phase and Heterogeneous Mixtures (Review)
(2022) Mikhalkin, V. N.; Sumskoi, S. I.; Tereza, A. M.; Troshin, K. Y.; Khasainov, B. A.; Frolov, S. M.; Сумской, Сергей Иванович; Фролов, Сергей Михайлович
Только метаданные
SIMULATION OF GENERATION AND PROPAGATION OF SHOCK/COMPRESSION WAVES IN BUBBLY MEDIA
(2021) Gubin, S. A.; Sverchkov, A. M.; Sumskoy, S. I.; Губин, Сергей Александрович; Сумской, Сергей Иванович
Только метаданные
Parameters of Air Cylindrical Shock Waves
(2020) Sof'in, A. S.; Zainetdinov, S. K.; Agapov, A. A.; Sumskoi, S. I.; Сумской, Сергей Иванович
© 2020, Pleiades Publishing, Ltd.Abstract: In this paper, we perform a numerical analysis of the parameters of shock waves (SWs) generated during the expansion of cylindrical volumes of compressed methane. A single dimensionless approximation of the overpressure dependence on the distance is obtained using precise numerical solutions. The overpressure values in the SW are estimated for both the near and far zones. Comparison with previously developed similar dependences shows a higher accuracy of the proposed approximation, which allows predicting the consequences of accidents during the rupture of pipelines.
Только метаданные
Effect of Obstructed Space on the Parameters of Shock Waves from the Deflagration of Hydrogen–Air Clouds
(2023) Sumskoy, S. I.; Sof’in, A. S.; Zainetdinov, S. Kh.; Lisanov, M. V.; Сумской, Сергей Иванович
Только метаданные
Methodological Approaches to Calculation of Accident Risk Indices with the Substantiation of Safe Allocation of Trunk Gas Pipelines within the Fifth Subzone of the Aerodrome Environs
(2024) Titko, V. L.; Sofyin, A. S.; Sumskoy, S. I.; Churkin, G. Yu.; Сумской, Сергей Иванович
Только метаданные
Parameters of Pressure Waves during the Rupture of Underwater Gas Pipelines
(2023) Sumskoy, S. I.; Sof’in, A. S.; Zainetdinov, S. Kh.; Agapov, A. A.; Сумской, Сергей Иванович