中文摘要：

为研究正癸烷云雾在相同粒径条件下气液两相浓度对燃爆参数的影响,用测量液雾粒径与浓度的光学测量系统和20 L二次脉冲气动喷雾多相爆炸测试系统,测量了基于相同索特平均直径D32,不同气液两相浓度的正癸烷云雾,实验研究了其燃爆参数。结果表明,在D32为38.11μm,点火能为40.32 J的条件下,正癸烷气液两相云雾燃爆下限总浓度为199.29 g·m^-3,对应的液相质量浓度为151.34 g·m^-3,气相体积浓度为0.77%（V/V）。在可燃浓度范围内,最大爆温峰值与最大爆压峰值分别为812℃和0.97 MPa。在D32为38.11μm的条件下,正癸烷云雾液相浓度对燃爆下限影响较小,而影响正癸烷云雾燃爆下限的主导因素是气相浓度。

英文摘要：

To study the influence of the vapor-liquid two-phase concentrations of n-decane sprays under the same particle size condition on explosion parameters,the n-decane sprays with different concentration of vapor-liquid two-phase based on Sauter mean diameter D_（32） were studied by an optical measurement system of particle size and concentration of liquid spray and a 20 L double pulse pneumatic spray multiphase explosion test system.The explosion parameters were measured.Results show that under the conditions of D32 as 38.11 μm and ignition energy as 40.32 J,the low flammability limit（LFL） total concentration of vapor-liquid two-phase n-decane sprays is 199.29 g · m~（-3）,corresponding liquid-phase mass concentration is 151.34 g · m^-3 and vapor-phase volume concentration is 0.77%（V/V）.The maximum detonation temperature peak and maximum detonation pressure peak in the flammable range of concentration is 812 ℃ and 0.97 MPa respectively.Under the condition of D32 as 38.11 μm,the influence of liquid-phase concentration of n-decane sprays on the LFL is smaller,whereas the dominant factor affecting the LFL of n-decane sprays is vapor-phase concentration.