Abstract
The nature of the breaks in the trace of the spinning detonation head is investigated. The analogy of the cusp of the spinning head and the interaction of a supersonic flow with a sharp wedge has been shown. It has been established that the stable cusp is observed in mixtures where the flow deflection angle behind the oblique wave exceeds the critical value for an upstream gas flow. In mixtures having the angle less than the critical one the oblique wave is replaced downstream and, therefore, the shock system is broken. The periodical flashes of unburned gas overcoming the shock system lead to repeated regeneration of the flow picture. The influence of a detonation tube curvature on the stability of flow was established. The explanation of this effect is given.
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