Puffing/Micro-explosion in Composite Mono-and Multi-component Droplets: Experimental Results and Modelling

Extended Abstract The results of recent experimental studies of puffing and micro-explosion and modelling approaches to their analysis are summarised. In [1] the analysis was focused on non-mixed and premixed Diesel fuel/water and rapeseed oil/water droplets. Air temperature was in the range 850–1100°C, and initial droplet radii were in the range 0.62–1.34 mm. It was shown that the time to puffing/micro-explosion decreases with increasing temperature, is weakly dependent upon the volume fraction of fuel, and increases with increasing droplet sizes. The analysis described in [2] focused on detailed experimental investigation of puffing and micro-explosions in composite water/rapeseed oil droplets in the presence of lignite and bituminous coal micro-particles in water. Droplets with radii in the range 1–2 mm were placed in a hot chamber with air velocities 3–7 m/s and temperatures up to 600°C. The time to puffing/micro-explosion and average radii of child droplets generated during puffing and micro-explosions were shown to decrease with increasing gas temperature. The above-mentioned experimental results