Evaporation of a single ethanol droplet interacting with a premixed laminar CH4/air flame
15th Triennial International Conference on Liquid Atomization and Spray Systems, ICLASS 2021, Edinburgh, İngiltere, 29 Ağustos - 02 Eylül 2021, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Basıldığı Şehir: Edinburgh
- Basıldığı Ülke: İngiltere
- Anahtar Kelimeler: droplet evaporation, Spalding model, stagnation flame, Two-phase combustion
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
Among all phenomena occurring in liquid-fueled combustion chambers, one basic process is the interaction of droplets with the flame. Therefore, it is essential to understand the dynamics of an individual droplet interaction with a flame front in order to analyze more complex flames. The aim of this study is to investigate the evaporation of a single ethanol droplet interacting with a premixed laminar CH4/air flame. In the experimental part of the study, the droplet was injected into the stagnation flame. The visualization of the flame front and the temporal monitoring of the droplet evaporation were performed using optical technics (PIV, PTV, ILIDS). In the numerical part of the study, single droplet evaporation under constant temperature and stagnant environment was studied with the Eulerian-Lagrangian approach using the YALES2 solver. The variations of the droplet and gas properties were computed under N2 atmosphere and under flame conditions. From the vaporization rate calculations, it is observed that there is a slight effect of flame stretch due to the change in the temperature profile. It is also observed that the flame temperature has a dominant effect on the evaporation rate rather than the burnt gas composition.