Research on quenching performance and multi-factor influence law of hydrogen crimped-ribbon flame arrester using response surface methodology

Abstract

• Experiment test system of H 2 explosion flame quenching performance was established. • Quenching mechanism and influence law of crimped-ribbon flame arrester were studied. • Multi-factor prediction models for V c and P c were established by RSM respectively. • Interactions of initial condition and structure parameter were analyzed separately. • Flame quenching criterion and the engineering guidance suggestion were proposed. The effects of initial conditions, structure parameters, and expansion chamber structures on the flame quenching performance of hydrogen crimped-ribbon flame arrester were experimentally studied based on the self-built experimental apparatus. The influence law of different working conditions on flame propagation velocity ( V f ) and explosion pressure ( P f ) entering the flame arrester and the corresponding flame quenching results were obtained. The results indicated that the V f and P f showed a trend of first increasing and then decreasing with increasing the hydrogen concentration ( C 0 = 10%-50%). The V f and P f were gradually increased with increasing the initial pressure and ignition energy, resulting in the obvious increase of flame quenching failure probability. However, the decrease in porosity and the increase in element thickness resulted in an obvious increase in the flame quenching success probability. Meanwhile, the expansion chamber, as an important influencing factor, could obviously affect the flame quenching results by affecting the flame propagation velocity and explosion pressure entering the narrow channels. By comparing the effects of three expansion chambers on flame quenching performance, the influence extents of different expansion chamber structures were determined (the extended type expansion chamber > the baffle type expansion chamber > the conventional type expansion chamber). Then the multi-factor prediction models of V f and P f under different initial conditions and structure parameters were established based on the Response Surface Methodology (RSM) respectively, and the extents of each influencing factor and their interactions on V f and P f were determined. Besides, the multi-factor prediction models of the critical flame propagation velocity ( V c ) and explosion pressure ( P c ) under different structure parameters were also established respectively. It was found that V c and P c were only related to the flame arrester structure parameters, and the critical flame quenching criterion was proposed.