Numerical prediction of envelope oscillation phenomena of shock-induced combustion

摘要

The envelope oscillation phenomena of the shock-induced combustion is numerically investigated by a series of the projectile velocities. The zero-dimensional analysis shows that the period of hte envelope oscillation is essentially the low frequency oscillation coupled with the high frequency oscillations. As for the flowfield of the envelope oscillation, the numerical simualtion reveals the detailed oscillation mechanism. The reaction front is always away from the bow shock wave, and the detonable reaction front is never established. Therefore, the corrugated pattern of hte reaction boundary moves with fluid like a flowfield of the regular regime of the unsteady shock-induced combustion.