Abstract

Unsteady three-dimensional detonations in both a circular tube and a square tube are simulated in order to reveal three-dimensional shock structure. The modes in the square tube are the rectangular mode in phase, the rectangular partially out of phase, and the diagonal mode. The rectangular mode partially out of phase is a spinning mode. Those in the circular tube are the spinning mode and the two-headed mode. Three-dimensional visualization for these modes is able to understand unsteady, complicated, and interesting shock wave patterns.

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