Abstract:
The propagation of a detonation wave in narrow flat and square channels is numerically simulated. The processes of instability development of a plane detonation wave and formation of a non-stationary multi-front structure are studied, the features of this process in two-dimensional and three-dimensional cases are considered. It is shown that in a flat channel the growth of transverse disturbances leads to the formation of a cellular structure first with small, then with larger cells. In a square channel the so-called diagonal three-dimensional structure is formed, which, however, is eventually replaced by the spin detonation mode. Its characteristics are studied, the spin step value is estimated. Good agreement with the predictions of the acoustic theory is shown.
Keywords:instability of a plane detonation wave, non-stationary multi-front structure, detonation spin, three-dimensional numerical simulation, parallel computing.
