Side venting versus end venting for large L/D vessel explosions with and without and obstacle

摘要

The influence of side venting on explosions in a large length to diameter ratio (L/D chemical bounds 13.9) vessel with and without an obstacle was evaluated and compared to end vented explosions. A number of pressure peaks were measured, due to different stages of the explosion. During side vented explosions without an obstacle it was found that the pressure oscillations in the combustion of the trapped unburnt gas was the dokminant phase of the explosion. During end-vented explosions the dominant event was the external explosion. With the obstacle in place the external explosion dominated the explosion development for both the side and end vented tests. The maximum overpressure for side venting with an obstacle was higher for end venting due to rapid combustion of the trapped end gases.