Comparison of detailed Chemical Models of Hydrogen Combustion in Numerical Simulations of Detonation
S. P. Borisov1, A. N. Kudryavtsev1,2, A. A. Shershnev1
1Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
2Novosibirsk State University, Novosibirsk, 630090 Russia
Keywords: ignition delay, instability of a plane detonation wave, detonation cell size, GPU computations
Abstract
Four detailed chemical mechanisms used to describe detonation combustion of hydrogen in oxygen are considered. Ignition delays for various temperatures and pressures are found, The Chapman-Jouguet velocity is determined, and the Zel'dovich-Neumann-Doring solution for different models is obtained. The effect of dilution of the stoichiometric mixture of hydrogen and oxygen by an inert gas is estimated. Direct numerical simulation of detonation wave propagation in a channel is performed; the emergence of instability of the plane wave and formation of a cellular (multifront) structure are studied. The results predicted by different chemical models are analyzed and compared with each other and with available experimental data.
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