Simulation of FA and DDT in a channel with repeated obstacles with an under-resolved mesh
作者： Knut Vågsæther , Dag Bjerketvedt
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摘要: Lee et.al. [1] and Moen [2] have described different regimes of high speed flame propagation in obstructed channels. Flame acceleration may lead to three regimes, choked regime, quasidetonation CJ-detonation. In quasi detonation DDT occurs but the fails due following interactions with obstructions. Experiments channels has been presented by several authors [1, 2, 3, 4, 5]. Gamezo [6] simulation results for repeated obstacles one step Arrhenius reaction rate. The are caused instabilities such as Rayleigh-Taylor, Richtmyer-Meshkov Kelvin-Helmholtz, flame-shock interaction flame-vortex interaction. Shock focusing Machreflections cause transition detonation. A comprehensive review is written Ciccarelli Dorofeev [7]. study simulations an under-resolved mesh motivated having ability predict fast flames large geometries or get within a short time. Models sub-grid behavior flame-flow field important describing since front thinner than computational size. This paper describes some validation codes mesh.
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