To comprehensively investigate the pressure influence on the flammability limits and explosion pressure of ethane and propane, a high-pressure slender cylindrical vessel with an effective length and diameter of 36.2 cm and 5 cm was used to simulate the explosions occurring in tubing-like space. Coiled tungsten hotwires with high-ignition energy were used as the ignition source during end-wall ignition. The lower flammability limit was assessed for ethane and propane under high pressures up to 15 MPa. A logarithmic dependence of pressure on flammability limits was observed in the examined pressure range. Comparing the lower alkanes data revealed that with rising carbon numbers, the lower flammability limit reduced. The impact of initial pressure on the upper flammability limit of ethane and propane was carried out below 5 MPa and 2.5 MPa, considering the liquefaction of ethane and propane under elevated pressures. For evaluating UEL data for C₂H₆/C₃H₈ in the air at high pressure, algebraic equations were developed. Due to the higher combustion heat and adiabatic flame temperature of C₂H₆ and C₃H₈, the explosion pressure of them was higher than that of CH₄, and propane produced the highest explosion pressure. The explosion pressure varied approximately linearly with the initial pressure. Because of the low concentration of combustible gas at the lower flammability limit, the explosion pressure was lower than that at the upper flammability limit. The underlying mechanism for the pressure dependence of the LFL is correlated to the combustion heat.

为全面研究压力对乙烷和丙烷的可燃极限和爆炸压力的影响，采用有效长度和直径分别为36.2 cm和5 cm的高压细长圆柱容器模拟管状空间发生的爆炸。在端壁点火过程中，采用具有高点火能量的盘绕钨热丝作为点火源。在高达 15 MPa 的高压下评估了乙烷和丙烷的可燃性下限。在检查的压力范围内观察到压力对可燃性极限的对数依赖性。比较低级烷烃数据表明，随着碳数的增加，可燃性下限降低。初始压力对乙烷和丙烷燃烧上限的影响在5 MPa和2.5 MPa以下进行，考虑在高压下乙烷和丙烷的液化。用于评估 C 的 UEL 数据₂ H ₆ /C ₃ H ₈在高压空气中的代数方程得到了发展。由于C ₂ H ₆和C ₃ H ₈较高的燃烧热和绝热火焰温度，它们的爆炸压力高于CH ₄，丙烷产生的爆炸压力最高。爆炸压力随初始压力近似线性变化。由于可燃性下限可燃气体浓度低，爆炸压力低于可燃性上限。LFL 的压力依赖性的潜在机制与燃烧热相关。