Numerical study on the self-organized regeneration of transverse waves in cylindrical detonation propagations

Summary

Cylindrical detonation propagation was numerically investigated by solving the two-dimensional multi-component Euler equations implemented with a one-step chemical reaction model. The numerical results demonstrate the evolution of cellular cell bifurcation of cylindrical detonation, and indicate that new cellular cells are generated from the self-organized transverse waves. The local curvature of the cylindrical cellular detonation is found to be a critical issue in the propagation. Originating from curvature variations, the concave front on the Mach stem between two triple points is developed from the flow expansion induced by both transverse wave motion and detonation front diverging. The concave front will focus later and result in the self-organization of transverse waves from which the cellular cell bifurcation takes place. The self-organization of transverse waves is dominated by shock diverging, flow expansion and chemical reactions.