Turbulent Flame Stabilization Methods Using Confinement, Diluents, and High-Potential Electric Fields.

摘要

Presented are three methods in controlling flame stability and enhancing flame control. The three methods that were observed were flame confinement, flame dilution with inert diluents, and high-potential electric field effects on flames. Flames that were under full confinement experienced similar liftoff trends to that of the unconfined flames; however, flames that were semi-confined (confinement cylinder with viewing window open) behaved much more sporadically due to an increase in turbulent swirling. Liftoff delays were also present in both the semi-confined and fully confined cases, such that a higher jet velocity is required to achieve initial liftoff from the fuel nozzle. In diluting methane and ethylene flames with nitrogen and argon it was observed that methane flames are more sensitive to dilution than ethylene flames. Also, ethylene flames were not a function of diluent type unlike methane flames.