EFFECT OF OPENING PRESSURE AND AREA BLOCKAGE DUE TO OBSTACLES ON VENTED NATURAL GAS EXPLOSION

The computational fl uid dynamics (CFD) software FLACS is used to study the distribution of the explosion overpressure and temperature at various values of the vent opening pressure and obstacle area blockage in a typical room. The results show that obstacles cause an indoor explosion fl ame, severely deforming and destroying the shape of an external combustion fl ame. The indoor peak overpressure and peak temperature positively aff ect the opening pressure and obstacle area blockage. These two factors have the synergistic eff ect on the overpressure of the indoor gas explosion and high-temperature hazards, which exacerbates the disaster; however, in the presence of obstacles, the eff ect of the opening pressure on the explosion overpressure and temperature disasters is not clearly evident. Thus, indoor obstacles have a two-sided eff ect on the secondary external explosion and the propagation of indoor fl ame during a vented explosion.
   
Author:  L. Pang, M. Jin, and K. Yang
Keywords:  gas explosion, vented explosion, obstacles, opening pressure
Page:  142