The
stability and the mean structure of methane partially premixed conical burner
flames was investigated numerically using ANSYS Fluent. The study presents and
discusses the stability curves of the partially premixed flame and maps the
mean flame structure based on contours of mass fraction of O2, CO
and temperature. From the data obtained, it can be concluded that both premixed
and non-premixed flames are less stable than the partially premixed flames. An
optimum level of partially premixing was found and the flames beyond this
threshold were found to be less stable. This optimum level was found, when the
ratio of the mixing length to the nozzle diameter is equal to 5. At this
specific degree of partially premixing, the flame exhibited triple interaction
reaction zones. It was found that with an increase of the angle of the cone of
the burner, the air entrainment increases which, in turns breaks the
stabilization core and hence cause a reduction in the flame stability limit.
The main role of the cone is to provide a protection from the surrounding
environment at early phase of the reaction near the jet exit where turbulence
with high intensity was observed.
Birincil Dil | İngilizce |
---|---|
Bölüm | Makaleler |
Yazarlar | |
Yayımlanma Tarihi | 22 Eylül 2019 |
Gönderilme Tarihi | 30 Aralık 2018 |
Yayımlandığı Sayı | Yıl 2019 |
IMPORTANT NOTE: JOURNAL SUBMISSION LINK http://eds.yildiz.edu.tr/journal-of-thermal-engineering