Experimental study on inhibition effect of inert gas parameters on gas deflagration flame propagation
HU Yang
YANG Yuxin
SHI Yundong
LYU Shuo
TAO Hong
Abstract：In this paper,we continue to build an ultra-high speed laser schlieren testing system on the self-developed mesoscale ex-plosion pipeline to explore the flame propagation characteristics of nitrogen and carbon dioxide inhibiting gas/air premixed gas de-flagration under different injection positions and pressures.The results show that:in the experiment of inert gas inhibiting gas/air premixed gas deflagration,with the gradual increase of injection pressure,the flame propagation speed shows a trend of first increas-ing and then decreasing,the flame shape also gradually stretches and deforms from fingertip shape,and the middle protruding part becomes smaller until it is nearly flat;the maximum flame propagation speed of CO2 injection near the ignition end is 20.79%lower than that of N2 injection far away from the ignition end,and 20.25%lower than that of N2 injection;when CO2 is injected far from the ignition end,the minimum flame speed is 9.68%lower than that of CO2 injection,and 12.86%lower than that of N2 injection;compared with the two kinds of flame retarding and explosion inhibition gases,the highest flame propagation speed of CO2 sprayed near the ignition end is 21.78%lower than that of N2,and the lowest flame propagation speed is 1.82%lower than that of N2.The highest flame velocity and the lowest flame velocity are 21.25%and 5.27%lower than N2 when CO2 is sprayed at the far ignition end.
Keywords：gas deflagrationinert gasflame retardant and explosion suppressionflame propagationlaser schlieren
Publication Date：2023-12-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 1-10 )