Influence of Vapor–Liquid Two-Phase n-Hexane/Air Mixtures on Flammability Limit and Minimum Ignition Energy

The aim of this work was to provide new experimental data on the influence of vapor–liquid two-phase n-hexane/air mixtures on the lower flammability limit (LFL) and minimum ignition energy (MIE). A series of experiments was carried out as follows: (1) A set of vapor–liquid two-phase n-hexane/air mixtures of various concentrations was obtained at the mean Sauter mean diameter (SMD) of 10.63 μm and the 80-ms ignition moment in the vessel. The errors were analyzed. (2) Experiments were implemented on vapor–liquid two-phase n-hexane/air mixtures of various concentrations at an ignition energy of 28 J and the initial room temperature and pressure of 21 °C and 0.10 MPa, respectively. The effects of the concentration of n-hexane on the explosion pressure, explosion temperature, and LFL were analyzed, and the results are discussed. (3) A series of experiments was implemented on vapor–liquid two-phase n-hexane/air mixtures of various concentrations at various ignition energies. The MIE of the vapor–liquid two-phase n-hexane/air mixture was 0.5 mJ in this work, and the results are discussed.