Abstract
This study is a numerical analysis on propagation behavior of a three dimensional detonation in a square tube and, influence on motion trajectories of high pressure region (shock triple points) due to the change of tube width was solved by a finite difference method which consists of the semi-implicit MacCormack method and TVD scheme in order to prevent numerical stiffness and Gibb's phenomena. Gas utilized in this computational study is the stoichiometric hydrogen and oxygen gas mixture composing 19 elementary reactions with 8 chemical species. It was found from numerical results that the behavior of shock triple points was classificated in three kind of modes. Furthermore, it was seen that the aspect ratio of the detonation cell became nearly constant value for each mode.
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