Experimental premixed flammable gas explosion venting in linked vessels with different pipe length

Premixed flammable gas explosion experiment was carried out in both closed and vented vessels linked with pipes of different lengths. The effects of pipe length on flame propagation and fluid field pressure in linked vessels were measured for both closed and vented explosion with the same areas. The results show that the propagation speed of flame accelerates and increases with the increasing of pipe length. The speed is less for vented vessel than closed one because of weakening effect of venting on pressure wave. Peak pressure of second vessel ascends with the increasing of pipe length for iso-volume explosion in linked vessels. For venting explosion process peak pressure in vented vessel is close to that of closed explosion, and larger than that in both single vessel and first vessel, and its change trend with the length of connecting pipe is affected by pressure of iso-volume explosion at closed conditions, the vessel area of venting explosion, flame propagation and so on.