Nonlinear dynamics of self-sustained supersonic reaction waves: Fickett's detonation analogue

Details Nonlinear dynamics of self-sustained supersonic reaction waves: Fickett's detonation analogue Nonlinear dynamics of self-sustained supersonic reaction waves: Fickett's detonation analogue

2011-01-21

arxiv.org/abs/1101.4246v3

Physics

Fluid Dynamics

4 pages, 3 figures

Scientific paper

The present study investigates the spatio-temporal variability in the dynamics of self-sustained supersonic reaction waves propagating through an excitable medium. The model is an extension of Fickett's detonation model with a state dependent energy addition term. Stable and pulsating supersonic waves are predicted. With increasing sensitivity of the reaction rate, the reaction wave transits from steady propagation to stable limit cycles and eventually to chaos through the classical Feigenbaum route. The physical pulsation mechanism is explained by the coherence between internal wave motion and energy release. The results obtained clarify the physical origin of detonation wave instability in chemical detonations previously observed experimentally.

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