Study on the gas-liquid two-phase explosion characteristics and suppression mechanism of methane/isoprene mixture

As a high-emission and high-value organic compound, Isoprene (C 5 H 8 ) plays an important role in industrial production. In this paper, the visualized isobaric balloon was used to investigate explosion characteristics and flame structures of different mass concentrations of isoprene and different volume fractions methane/isoprene mixtures, exploring the gas-liquid two-phase reaction mechanism of methane/isoprene mixtures. The explosion suppression of the mixture was achieved using typical inert gases. The investigation results showed that the explosion power of isoprene liquid fuel increased first and then decreased, and the optimal mass concentration was 272 g·m −3 . The addition of methane could increase the explosive power of isoprene. The maximum values were reached at a 10 vol% methane/272 g·m −3 isoprene mixture, which were 322.68 Pa, 3.94 m/s, and 3068 K, respectively. In addition, using the form of gas phase partial inerting, the suppression effects of the three inert gases on the explosion characteristics parameters, flame propagation speed, and flame temperature of the mixture are as follows: CO 2 > N 2 > Ar.