Results of experimental and theoretical studies of the influence of surface tension coefficient of slurry fuel on the breakup mechanism for droplets of various sizes are presented. Three velocity ranges of droplets in a stream were identified during coaxial spraying: 0–8 m/s; 8-35 m/s; 35 m/s and higher. Analyzed slurry fuel droplets were from 50 to 500 microns in size. Effect of surface tension coefficient of slurry fuel on the process of droplet breakup was theoretically confirmed. It was found that droplets of 50–150 µm in size are most susceptible to vibratory breakup. As the speed and size of the droplets grow, up to 500 μm and 35 m/s, respectively, catastrophic breakup of droplets begins to predominate. Drops of 450-500 microns in size are completely unaffected by vibratory breakup in the process of coaxial spraying in the researched velocity range. Expressions were obtained that allow estimating We criterion at a pressure of suspension of 0.2 MPa and air of 0.18 MPa.
|Affiliation of speaker||Tomsk Polytechnic University|
|Publication||Journal of Cleaner Production|
|Position of speaker||PhD student|