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This article is cited in 8 scientific papers (total in 8 papers)
Kinetic simulation of unsteady detonation with thermodynamic nonequilibrium effects
C. Lina, K. H. Luob a Sun Yat-sen University, Zhuhai, China
b University College London, WC1E 7JE, London, United Kingdom
Abstract:
Thanks to its mesoscopic kinetic nature, the discrete Boltzmann method has a capability of investigating unsteady detonation with essential hydrodynamic and thermodynamic nonequilibrium effects. In this work, an efficient and precise reactive discrete Boltzmann method is employed to investigate the impact of the amplitude and wave length of the initial perturbation, as well as of the chemical heat on the evolution of unsteady detonation with nonequilibrium effects. It is shown that the initial perturbation amplitude only affects the unsteady detonation in the early period, and the detonation becomes self-similar with minor phase differences later on. For small wave lengths, the pressure increases faster with a higher oscillation frequency in the early period, but decreases soon afterwards. With increasing chemical heat release, the pressure and its oscillations increase, and the nonequilibrium effects become more pronounced, but the oscillatory period decreases. When the wave length or chemical heat release is small enough, there is no transverse wave or cellular pattern, and the two-dimensional unsteady detonation reduces to the one-dimensional case.
Keywords:
unsteady detonation, thermodynamic nonequilibrium.
Received: 26.12.2019 Revised: 19.02.2020
Citation:
C. Lin, K. H. Luo, “Kinetic simulation of unsteady detonation with thermodynamic nonequilibrium effects”, Fizika Goreniya i Vzryva, 56:4 (2020), 73–82; Combustion, Explosion and Shock Waves, 56:4 (2020), 435–443
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https://www.mathnet.ru/eng/fgv696 https://www.mathnet.ru/eng/fgv/v56/i4/p73
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