To investigate the explosion parameters of Fuel Air Mixtures, the two-phase gas-droplet conservation equations are used. The model includes the following aspects: the deformation and fragmentation of the fuel droplet, the formation of fuel gas through evaporation and stripping of the boundary layer of the fuel droplet, the chemical delay and chemical reaction velocity between fuel gas and oxygen in the air. The high-resolution implicit TVD schemes are applied to gas phase equations and MacCormack schemes to liquid phase equations. The formation and propagation process of gas-droplet detonation wave inside the fuel air cloud and the attenuation process of the shock wave outside the cloud are simulated numerically. The simulation results keep good agreement with others’ study. The explosion effects of the height of the second ignition inside the cloud and the ratio of the cloud height to the cloud diameter are investigated numerically, too.

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