Thermal and emission characteristics of a turbulent swirling inverse diffusion flame

Efforts were made to compare the global NOx and CO emissions of the swirling and non-swirling IDFs. It was found that strong swirl and lean combustion are two key factors for reducing NOx emission. However, the decreasing NOx emission is compromised by increasing CO. Under stoichiometric and rich conditions, EINOx of the swirling IDFs is slightly higher, but the EICO is significantly lower. Further comparison of EINOx with other studies indicates that the swirling IDF can achieve low NOx emission.