文献类型：期刊文献

英文题名：Numerical Study of the Effect of Staged Gun and Quarl on the Performance of Low-NOx Burners

作者：Liu, Bo[1];Wang, Yuan-Hua[1];Xu, Hong[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2016

卷号：142

期号：3

外文期刊名：JOURNAL OF ENERGY ENGINEERING

收录：;EI(收录号：20163402735601);WOS:【SCI-EXPANDED(收录号:WOS:000383141900013)】；

语种：英文

外文关键词：Numerical simulation; Fuel staging; Quarl; Low-NOx burner; Computational fluid dynamics

摘要：Three-dimensional numerical simulations were carried out to study fuel-staged low-NOx burners (LNB). The effect of the number of staged guns (four and six) and quarl style (Venturi and boss) on the performance of the LNBs was investigated. The flow field, flame temperature, OH radical field, and NO emission were analyzed. The turbulence, radiation, and chemical reactions were simulated with the standard k-epsilon model, discrete ordinate (DO) model, and probability density function mixture fraction model, respectively, using a commercial computational fluid dynamics code. The numerical model was validated with experimental measurements at different excess air conditions. The agreement of the calculated and measured NO emission is remarkable; therefore, the present model is considered reliable. The results indicate that the number of staged guns has little effect on the NO emission; the boss quarl increases mean air velocity, changes staged gas flow direction, and reduces peak flame temperature and peak OH mole fraction. The boss quarl reduces more than 60% of the NO emission compared with the Venturi quarl.