Investigation on the influence of jet pressure on detonation initiation via imploding annular shock waves

In order to investigate the influence of jet pressure on detonation initiation via imploding annular shock waves,detonation initiation with different jet pressures was simulated with hydrogen-air mixture.The results indicate that,when jet pressure is high enough,imploding annular shock waves can form high pressure and high temperature region that lead to direct initiation;thrust wall can strengthen reverberation shock,which contributes to initiate detonation;when the jet pressure is lower than its critical value,detonation can not be initiated.