Suppression of methane/air deflagration-to-detonation transition in the linked vessel

A set of experimental equipment for suppression of methane/air deflagration-to-detonation transition (DDT) was proposed. In this investigation, a 113-L cylindrical vessel and a 6-m long linked pipe with a 100-mm internal diameter were used to investigate the suppression characteristics of methane/air deflagration-to-detonation transition (DDT) in a linked vessel. The experimental results showed that multi-layer mesh and aluminum silicate wool were effective in preventing DDT in this setup. All the aluminum silicate wool and wire mesh used in the experiments except for the 5-layer 40-mesh mental wire mesh can suppress DDT in the linked vessel. There is a significant pressure difference at the end of pipe when multi-layer metal mesh was used. The suppression effect was obvious, the pressure at the end of the pipe was reduced by about 70% when 25 layers wire-mesh were used. With the increase of mesh layer, the suppression effect is better. In general, the explosion suppression effect of mesh layers on 40 mesh wire mesh is more significant than that on 60 mesh wire mesh. In addition, an increase of thickness and length of aluminum silicate wool can enhance the explosion suppression performance. The aluminum silicate wool with a length of 900 mm and a thickness of 5 mm reduces the maximum pressure by about 61%.