温度和浓度对甲醇喷雾爆炸特性参数的影响

The explosion characteristics of methanol under different ambient temperature, material temperature and spray concentration were investigated by using the 20 L spherical explosion experiment system. The results show that the explosion limit of methanol spray droplets in the 20 L explosion vessel is 118.8-594.0 g/cm³. Compared with the limit range of pure gas explosion (78.6-628.6 g/cm³), the limit range of methanol spray droplets explosion is narrower, and the sensitivity of spray droplets is lower than that of pure gas methanol vapor. As the ambient temperature in the explosion vessel increases, the limit range of methanol spray explosion becomes wider, and the probability of successful ignition of gas-liquid spray in the confined space increases. When the temperature of the methanol or the ambient temperature of the explosion vessel remains unchanged, parameters of the corresponding explosion characteristic firstly increase, and then decrease after the inflection point of Φ=1.8. When Φ=1.8, there is a maximum over pressure peak in the methanol spray explosion. The increasing ambient temperature and material temperature can improve the atomization and then promote diffusion combustion. However, the effect of ambient temperature is more significant than the factor of material temperature on the characteristic parameters of methanol droplet spray explosion. The ambient temperature and stoichiometric ratio affect the strength value of methanol spray explosion. When Φ=1.8 and the ambient temperature is 303.15 K, the intensity of methanol spray explosion is greater than the intensity of methane gas explosion.