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Numerical Structure Analysis of Regular Hydrogen-Oxygen Detonations

Deiterding, Ralf (2003) Numerical Structure Analysis of Regular Hydrogen-Oxygen Detonations. In: The Fall 2003 Meeting of the Western States Section/The Combustion Institute, 20-21 October 2003, Los Angeles, California. (Submitted)

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Large-scale numerical simulations have been carried out to analyze the internal wave structure of a regular oscillating low-pressure H2 : O2 : Ar-Chapman-Jouguet detonation in two and three space-dimensions. The chemical reaction is modeled with a non-equilibrium mechanism that consists of 34 elementary reactions and uses nine thermally perfect gaseous species. A high local resolution is achieved dynamically at run-time by employing a block-oriented adaptive finite volume method that has been parallelized efficiently for massively parallel machines. Based on a highly resolved two-dimensional simulation we analyze the temporal development of the ow field around a triple point during a detonation cell in great detail. In particular, the influence of the reinitiation phase at the beginning of a detonation cell is discussed. Further on, a successful simulation of the cellular structure in three space-dimensions for the same configuration is presented. The calculation reproduces the experimentally observed three-dimensional mode of propagation called "rectangular-mode-in-phase" with zero phase shift between the transverse waves in both space-directions perpendicular to the detonation front and shows the same oscillation period as the two-dimensional case.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Also available in the Caltech Center for Simulation of Dynamic Response in Materials archive, cit-asci-tr281, at
Group:Center for Advanced Computing Research
Record Number:CaltechCACR:2003.210
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Usage Policy:You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.
ID Code:28208
Deposited By: Imported from CaltechCACR
Deposited On:18 Jan 2005
Last Modified:03 Oct 2019 03:30

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