为了研究水雾-N₂协同作用对CH₄爆炸抑制规律，通过流体动力学软件，选择CH₄浓度为10%的CH₄-空气预混气体为研究对象，探究不同水雾粒径、不同N₂浓度等因素对CH₄-空气预混气体爆炸抑制的影响。结果表明：在水雾粒径范围为30 ~ 150 μm时，70 μm粒径的水雾对CH₄-空气预混气体爆炸抑制效果最佳；当水雾粒径为70 μm时，随着N₂浓度从5%增大至30%，混合气体爆炸压力峰值从0.193 MPa降至0.098 MPa，压力上升速率迅速下降至零，爆炸温度也逐渐降低，反应体系中存在不同浓度的N₂对混合气体爆炸温度峰值有影响，但对降温速率没有显著影响。研究成果对水雾-N₂协同抑制气体爆炸的工程应用有重要意义。

In order to study the synergistic effect of water mist-N₂ on CH₄-air mixture explosion, the CH₄-air mixture with CH₄ concentration of 10% was chosen as the research object. The effects of different water mist diameters and different N₂ concentrations on the suppression of CH₄-air mixture explosion were investigated using a fluid dynamics software. The results show that when the diameters of water mist ranges from 30 μm to 150 μm, the water mist with a diameter of 70 μm has the optimal suppression effect on CH₄-air mixture explosion. When the diameter of water mist is 70 μm, as the N₂ concentration increases from 5% to 30%, the peak explosion pressure of the mixed gas decreases from 0.193 MPa to 0.098 MPa, and the pressure rise rate rapidly drops to zero, the explosion temperature also gradually decreases. The presence of different concentrations of N₂ in the reaction system has an impact on the explosion temperature of the mixed gas, but has no significant effect on the cooling rate. The results are of great significance for the engineering application of water mist-N₂ synergistic suppression of gas explosions.