A. Alexiou et al., THE EFFECT OF VENT SIZE ON PRESSURE GENERATION IN EXPLOSIONS IN LARGEL D VESSELS/, Combustion science and technology, 114, 1996, pp. 645-652
There is a need for more explosion relief data in large L/D vessels. I
n this paper we report an experimental investigation of the effect of
vent size on the overpressure development in a large L/D, end-vented v
essel. Three pressure peaks were identified: P-1 due to an initial elo
ngated flame (characteristic of large L/D explosions); P-2 due to turb
ulent combustion in the middle and end sections of the vessel and P-3
due to the external explosion. P-1 was found to be the dominant overpr
essure for small vent areas and to increase with decreasing vent size,
whereas the flame speed was reduced (as well as P-2 and P-3) due to r
eduction of unburnt gas flow through and out of the vessel.