Numerical simulation of detonation wave propagation in a non-uniform medium in the shock-attached frame

Lopato, A.I.; Poroshyna, Y.E.; Utkin, P.S.

Авторы: Lopato A.I., Poroshyna Y.E., Utkin P.S.
Сборник: Proceedings of the 29th International Colloquium on the Dynamics of Explosions and Reactive Systems. SNU Siheung, Korea, 23 – 28 July 2023
Серия: http://www.icders.org/ICDERS2023/abstracts/ICDERS2023-066.pdf
Год издания: 2023
Номер статьи: Paper No. 66
Аннотация: We have developed a computational algorithm for the simulation of a one-dimensional gas flows with detonation waves in the shock-attached frame of reference using a single-step Arrhenius kinetics for the case of variable gas density in front of the wave. The algorithm proposed in the paper is easily extended for the case when the medium is characterized not only by varying density, but also by other parameters. Additional conditions for other parameters, by analogy with density, can be added to the system of equations to determine the velocity of the leading wave.The developed algorithm was applied to describe the propagation of a stable detonation. The amplitude and wavelength of the density perturbation were chosen such that a fairly mild detonation propagation regime known in the literature was realized. The oscillation frequencies of the parameters behind the detonation wave front corresponded to the oscillation frequency of the parameters of the medium in front of it. As a result of the conducted characteristic analysis, it was shown that in this case, one cycle of parameter fluctuations behind the detonation wave front can be schematically decomposed into two passes of characteristics C+ and two passes of characteristics C0 along the conditional induction zone. The phase lag between the oscillation curves of the detonation wave velocity and the gas density in front of the wave can be estimated as the maximum time of passage of the characteristic C+ through the induction zone.
Добавил в систему: Уткин Павел Сергеевич

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Numerical simulation of detonation wave propagation in a non-uniform medium in the shock-attached frameстатья

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