F122 On the Characteristics of Turbulent Combustion for Model Coal-gasification Syngas with Pure Oxygen at High Pressure

Abstract

An experimental study of turbulent premixed flames for the CO-H_2-CO_2-O_2 mixtures as a model of syngas oxyfuel combustion was investigated at high pressure. Results showed that the flame front structure of CO-H_2 flames is much fine and have smaller scale compared to CH_4-air flame. The CO-H_2 flames with narrow heat release region tend to be combustion oscillation at premixed-type gas turbine combustor. The bending of S_T/S_L with u'/S_L is not observed for CO-H_2-CO_2-air flames, while, it was observed for other flames and this would be due to the wrinkle of the flame front by turbulence was limited by the flame intrinsic instability.