Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2024 - September 11, 2024
Flame stability of combined flames formed in a co-axial dual nozzle burner consists by main burner and annular burner have investigated experimentally. Lean premixed methane air mixture issued from the main burner while pure methane gas flow from annular pilot burner. By using the pilot burner, blow-off limits of the lean premixed flame can be extended drastically. The diffusion flame encountered with the lean premixed flame works as a booster and forms the combined flame. Then, the structures of combined flames can divide into three distinct flame shape, lifted flame, tip open flame and rim stabilized flame. In the lifted flame, the lean premixed flame lifts by the pilot diffusion flame and forms to separate from the burner rim. In the lifted space, mixing zone for the lean premixed gas and fuel from the pilot burner. The boost fuel from the pilot burner plays a key role for the stability of the lean premixed flame.
