Numerical Investigation on the Flow, Combustion and NO Emission Characteristics in a 10 MW Premixed Gas Burner

The characteristics of the combustion temperature, flow velocity, CO distribution and NO x emissions of a 10 MW gas burner at different primary to secondary air ratios are numerically studied using computational fluid dynamics software Fluent. The results indicate that the primary to secondary air ratio in gas burner determines the combustion quality through influencing some parameters directly, such as the combustion efficiency, combustion intensity, profile and stability of flame as well as emission of NO x . Then two evaluation indexes of combustion quality are summarized after analyzing the flame structure and characteristics of the flow. The detailed results reported in this paper may provide a useful basis for NO x reduction and premixed gas burner design. Finally some proposals are given to choose the optimal primary to secondary air ratio for a gas burner.