This numerical study focused on the heat transfer process between the ultrafine water mist and explosion flame, and the suppression mechanism of ultrafine water mist and the effect of mist parameter on methane explosion. Hence, a three-dimensional numerical model for methane explosion suppression by ultrafine water mist was established. Large eddy simulation and partially premixed combustion models were used to determine the explosion flow field characteristics and methane explosion process, respectively. The Euler-Lagrange equation was used to solve the continuous and discrete phases, and the coupling calculation was realized by alternately solving these two phase models. In addition, the validity of the numerical model and calculation method was verified by the experimental results. Mist vaporization, heat transfer between the gas and liquid phases, and influencing factors (including the mist diameter (d), mist velocity (v), and mist concentration (Q_Mist)) were analyzed quantitatively. The results indicate that heat exchange mainly occurs in the reaction zone, and the heat exchange rate can be affected by the mist parameters, which further affects the temperature inside the vessel. Moreover, the vapor pressure generated from mist vaporization is an important component of the explosion pressure in the closed vessel, and it is comprehensively affected by the mist vaporization rate and temperature. Simultaneously, the mist parameters are also the key influencing factors for the above process.

数值研究的重点是超细水雾与爆炸火焰之间的传热过程，超细水雾的抑制机理以及雾参数对甲烷爆炸的影响。因此，建立了超细水雾抑制甲烷爆炸的三维数值模型。用大涡模拟和部分预混燃烧模型分别确定爆炸流场特征和甲烷爆炸过程。使用Euler-Lagrange方程求解连续相和离散相，并通过交替求解这两个相模型来实现耦合计算。实验结果验证了数值模型和计算方法的有效性。雾气蒸发d），雾速度（v）和雾浓度（Q _Mist））被定量分析。结果表明，热交换主要发生在反应区，热交换速率受雾参数的影响，进一步影响了容器内部的温度。此外，由气雾汽化产生的蒸汽压力是密闭容器中爆炸压力的重要组成部分，并且它受气雾汽化速率和温度的综合影响。同时，雾气参数也是上述过程的关键影响因素。