2nd International Scientific Conference on «Sustainable and Efficient Use of Energy, Water and Natural Resources»

Influence of surface tension coefficient of slurry fuel on the breakup mechanism of droplets of various sizes

Not scheduled

15m

Малый конференц-зал, 1 этаж

Oral Enviromentally-Frendly Energy Conversion and Supply/Экоэнергетика Enviromentally-Frendly Energy Conversion and Supply/Экоэнергетика

Speaker

Mr Andrey Zenkov (Tomsk Polytechnic University)

Description

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.