Akademik Veri Yönetim Sistemi
Atomization and Sprays, cilt.32, sa.9, ss.79-94, 2022 (SCI-Expanded)
Single ethanol droplet evaporation characteristics were studied under premixed CH4/air flame conditions via experimental and numerical approaches. In the experimental part, an ethanol droplet with an initial diameter between 20 and 70 μm was injected through a flat laminar stagnant flame. Visualization of the flame front and temporal monitoring of the droplet evaporation at high temperatures up to 2200 K were conducted using planar laser tomography. Velocity measurements indicated that the droplets were small enough to be carried by surrounding gas with a very small slip velocity. Variation in droplet diameter was tracked through the flame via ILIDS and showed to be more drastic in burnt gases. Hence, vaporization rates were reported at burnt gas temperature which is affected by the heat losses from flame to the stagnation plate due to the change in the temperature profile. In the numerical part, single droplet evaporation under constant temperature and stagnant environment was considered with the Spalding model using the YALES2 solver. The variations of the droplet properties were computed under N2 atmosphere and under flame conditions. At elevated conditions, the flame temperature had a more dominant effect on the evaporation rate rather than the burnt gas composition.