粉塵爆発における粒子の昇温遅れの影響

抄録

A dust explosion may occur when a cloud of combustible particles forms. Analyzing the consequences of a potential explosion hazard is the first step toward assessing its risk. The particle size is a primary factor that influences the consequences. This study aims to develop a simple dust-explosion model to estimate the influence of particles’ thermal inertia, i.e., the temperature difference between a particle and the surrounding gas. The representative time that characterizes the time delay for the particle’s temperature to reach its ignition temperature is introduced as a model parameter; the dependence of burning velocity on the parameter is then analytically evaluated.