Explosion Characteristics by Different Sizes in the Wall Surface Shape of a Water Gel Barrier

Abstract - Experimental investigations were carried out to examine the explosion characteristics by differ-ent sizes in the wall surface shape of a water gel barrier in an explosion chamber, 1,600 mm in length with a square cross-section of 100 × 100 mm 2 . The sizes in the wall surface shape were varied by using water gel bar-riers with a cross-section of 100 × 200 mm 2 and its were varied in the bottom of the chamber away 300, 700 and 1,100 mm, respectively from the closed end of the chamber. The flame propagation images were photo-graphed with a high speed camera and the pressure was recorded using a pressure transducer and a data acquis-ition system. It was found that as the size of the wall surface shape increased, the flame propagation process and the time taken to reach the maximum pressure were found to be faster. As a result, both the flame speed and the explosion overpressure increased as the size of the wall surface shape increased. Key words : Wall surface shape, Gel barrier, Flame speed, Pressure