Numerical Investigation of a Piloted Premixed Jet Burner

Premixed and partially premixed combustion technologies have the potential of reducing pollutant emissions and enhancing the overall combustion efficiency. However, the successful implementation of these technologies in practical systems requires a thorough understanding of the underlying combustion-physical phenomena. To predict partially premixed combustion, a three-stream progress-variable model has been developed. This model is applied to large-eddy simulations of the piloted premixed jet burner experiment of Dunn et al., and configurations PM1-\{50,100,150\} are considered. Comparisons with measurements for all three configurations are presented, and it is shown that this model is capable of capturing the characteristics of the flow-field, temperature, and compositional field.