Abstract

Nanosecond time-resolved schlieren imaging is performed to investigate laser-induced breakdown in nitromethane, nitroethane and 1-nitropropane, and the associated dynamics of laser-induced shock waves and cavitation bubbles. The exothermic reactions upon decomposition and the chemical reactions in the vapor plume behind the shock front increase the shock wave velocity. The correlations of oxygen balance with shock wave velocity, bubble radius, lifetime and bubble energy are established. For instance, shock wave velocity is proportional to the negative inverse of oxygen balance. In addition, the bubble energy of nitroethane tends to saturate at high pulse energy.

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