Pulsating and cellular instabilities of hydrogen-oxygen detonations with ozone sensitization

Numerical simulations have been conducted to investigate the effects of ozone (O3) sensitization on pulsating and cellular instabilities of one- and two-dimensional (1-, 2D) detonations in hydrogen-oxygen-helium (H2/O2/He) mixture with and without O3 addition. The predictions have been analyzed to illustrate the different modes of 1D detonation in H2/O2/He mixtures and its thermal sensitivity to the varying distributions of the heat release rate due to He dilution. The results are further analyzed to gain insight about the effect of O3 addition on the induction length, propagating mode of 1D detonation and its stability. Finally, the role of O3 sensitization on cellular detonation in the 2D simulations is analyzed in terms of its effect on the detonation cell size, induction length, and detonation instabilities. The results indicate considerable potential of O3 sensitization to reduce the existence of unburnt pockets, reduce cell size, and increase detonation stability.