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Detonation Initiation upon Interaction of a Shock Wave with a Combustible Gas Bubbleстатья Перевод
- Авторы: Georgievskiy P.Y., Sutyrin O.G.
- Журнал: Doklady Physics
- Том: 67
- Номер: 3
- Год издания: 2022
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 74
- Последняя страница: 79
- DOI: 10.1134/S1028335822020057
- Аннотация: (a) Research Institute of Mechanics, Moscow State University, Moscow, 119192 Russia*e-mail: georgi@imec.msu.ru **e-mail: sutyrin@imec.msu.ruPresented by Academician V.A. Levin November 24, 2021 Received November 25, 2021; revised November 25, 2021; accepted December 6, 2021Published: 22 March 2023ISSN 1028-3358, Doklady Physics, 2022, Vol. 67, No. 3, pp. 74–79. © Pleiades Publishing, Ltd., 2022. Russian Text © The Author(s), 2022, published in Doklady Rossiiskoi Akademii Nauk. Fizika, Tekhnicheskie Nauki, 2022, Vol. 503, pp. 35–41.Abstract—In this paper, we perform a numerical simulation of the interaction of a shock wave in a gas with an ellipsoidal combustible gas bubble of increased density in a two-dimensional plane and with axisymmetric formulations based on the Euler equations. Three qualitatively different modes of detonation initiation were found: direct detonation initiation in the front part of the bubble at sufficiently high Mach numbers of the incident wave and detonation initiation as a result of wave refraction and focusing of secondary shock waves in the rear part of the bubble at lower Mach numbers. The detonation initiation mode is shown to depend significantly on both the shock wave intensity and the bubble shape. The elongation of the bubble leads to a decrease in the threshold Mach numbers: moderately in the axisymmetric case and significantly in the case of plane symmetry. The effect of focusing the shock wave allows achieving successful detonation initiation at a fundamentally lower intensity of the incident wave compared to direct initiation. Keywords: shock wave, gas bubble, focusing of the shock wave, cumulation, detonation DOI: 10.1134/S1028335822020057 FUNDING This work was carried out in accordance with the research plan of the Research Institute of Mechanics, Moscow State University, using the equipment of the Center for Shared Use of Ultra-High-Performance Computing Resources, Moscow State University, and was supported by the Ministry of Science and Higher Education of the Russian Federation, agreement no. 075-15-2020-806
- Добавил в систему: Левин Владимир Алексеевич