TY - JOUR
TI - Flame characteristics influenced by the angle of burners for non-premixed C3H8/air
AU - Jiang Fuhua
AU - Cao Guipin
AU - Zhang Yan
JN - Thermal Science
PY - 2022
VL - 26
IS - 6
SP - 5147
EP - 5156
PT - Article
AB - The study of micro flame characteristics is an essential basis for developing micro combustors. Therefore, the non-premixed C3H8-air micro flame characteristics were experimentally studied. Flame length, flame shape, and blow-out limit were studied by varying the equivalence ratio, Ф, the inlet velocity of C3H8-air, v, and angles of the burner. The results showed ignited non-premixed C3H8-air had three combustion states: no flame, a stable flame, and a blow-out flame. Whether ignited non-premixed C3H8-air could form a stable flame mainly depended on Ф and v. In addition, total flame lengths increased with the increase of Ф and v firstly. However, when Ф increased to a certain value, total flame lengths were independent of Ф and only affected by v. Moreover, flame length and shape were affected by the angle of the burner. Instead, the blow-out limit was found to be associated solely with Ф, but not the burner angle. The findings of this study provided fundamental data for the development of high-efficiency micro combustors.