Hydrocarbon Fuel Gas Cloud Explosion Suppression And Relief Of Experimental Research

In a φ 200mm*5400mm vertical cylindrical shock tube, a series experiments were done to study different influencing factors to cloud blasting wave, including wave intensity, water density ,drip diameter. The restrain of different suppression ways to the explosion was studied and their suppressing effects were compared. The results indicate that, shock wave will become more week with the increasing of wave intensity or increasing of water density or decreasing of drip diameter while two of the three are fixed, The suppressing effect of inert dust is the best, and the suppressing effect of NaHCO₃ solution is 12% higher than that of pure water.In a cylindrical vessel (V=0.0094m³), the external pressure and secondary explosions of venting of hydrocarbon were experimentally study. The influence of different fuel, different equivalence ratio( φ) and different vented covering to the external flow field were discussed. Using Micronscan7200, the pictures of outside temperature field were got. The results show that PO is easier than 90# gasoline occurring secondary explosions. The pressure and spread velocity of inner and outside flow field is the highest when φ=1. The secondary explosions occur more easily when φ > 1. High tenacity of venting covering is easy to happen ventage venting.