Effect of Coflow Temperature on Combustion Stabilization of Jet Flames

Abstract:

The effect of coflow temperature on stabilization of lifted turbulent jet flames of liquid fuels in controllable active thermo atmosphere（CATA）was investigated through analyzing the flame base heights fluctuation. The test results show that a flame base jump is an auto ignition phenomenon the upward flame base. The stabilization mechanism of the lifted flame varies with co flow temperature and 1 074 K is considered as a critical point. The lifted flame is controlled by the auto ignition of fuel upward flame base bet when the temperature is below 1 074K, and the flame stabilization is controlled by the flame spread speed when it is over 1 074 K. Flame base jump frequency and length are related to the co flow temperature. As the co flow temperature increases, the flame base jumps less frequently and the jump lengths are shortened.