Numerical study of detonation initiation by a supersonic sphere

摘要

Conditions of detonation initiation induced by a supersonic sphere in a stoichiometric hydrogen/oxygen mixture with 70/100 argon dilution, are inves- tigated numerically. The physical model includes a detailed full chemistry and is solved using an LU-SGS TVD scheme. Transition of the two extremes, shock induced combustion and detonation, are examined over pressures ranging between 0.2 bar and 10 bar. For shock induced combustion regime, the present study exhibits a clear process of coupling and decoupling between shock wave and combustion wave.