Experimental study on the synergistic effect of sliding devices on gas-liquid two-phase flow suppression of methane explosion in confined spaces
To investigate the influence of different gas-driven wa-ter mist sprays on the methane explosion characteristics under slid-ing devices,10 cm×10 cm×100 cm explosion tests were con-ducted in a square tube,using high-speed camera technology and pressure acquisition technology.By changing the spring diameter of the sliding device and the type of water mist driving gas,the ef-fects of different working conditions on the evolution behavior of the explosion flame structure and the transient change law of pres-sure were analyzed.The results show that the synergistic suppres-sion and extinguishing effect of N2 driven water mist and sliding device on methane is better than that of air driven water mist syn-ergistic sliding device,and N2 can play a redundant extinguishing and synergistic effect in preventing the failure of water mist sup-pression.Compared to the effect of air-driven water mist,N2-driven water mist can effectively shorten the flame combustion time,delay the peak velocity of the flame front,suppress the evo-lution of the flame front morphology,narrow the pressure oscilla-tion range,attenuate nearly half of the overpressure peak,effec-tively control the maximum overpressure peak within the combus-tion zone,and reduce the possibility of secondary explosion haz-ards in the unburned zone.
methane explosiongas drovefine water mistslid-ing device
NETL
NSTL
万方数据
维普
