Effects of hydrogen content on methane/air deflagration characteristics under a weak constraint condition

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (6) : 255-261.

ZHANG Beibei1, CHENG Yangfan1，2, XIA Yu2, QIAN Jiaqi2, WEI Xiao2

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Abstract

In the study, a self-made visual gas explosion experimental equipment was used to simulate the weak constraint space with latex balloon as a reaction vessel. The characteristic parameters of explosion flame temperature field, explosion pressure and flame propagation velocity of methane/air premixed gas with different hydrogen addition were studied. Combined with the experimental test and Chemkin software simulation results, the effects of hydrogen concentration on the explosion characteristics of methane/air were analyzed in detail. The results showed that as the hydrogen content increased, the internal field of the mixed gas combustion flame became lower, and the temperature of flame edge increased. The peak overpressure and the maximum pressure rising rate of the premixed gas increased gradually. Since the mole fractions of H, O and OH radicals increased with hydrogen addition, the flame propagation velocity was accelerated. Meanwhile, through the sensitivity analysis of the mixed-gas, it was found that the combustion of hydrogen would be inhibited by the presence of methane inhibits to a certain extent.

Key words

weak constraint / hydrogen / methane / gas explosion / deflagration characteristics / colorimetric thermometry

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ZHANG Beibei1, CHENG Yangfan1，2, XIA Yu2, QIAN Jiaqi2, WEI Xiao2. Effects of hydrogen content on methane/air deflagration characteristics under a weak constraint condition[J]. Journal of Vibration and Shock, 2024, 43(6): 255-261

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