期刊
JOURNAL OF THE ENERGY INSTITUTE
卷 90, 期 3, 页码 441-451出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.joei.2016.03.005
关键词
Numerical simulation; Fuel-staged burner; Chemical flame height; NO emission
Three dimensional numerical simulations were performed to optimize the geometrical parameters of a fuel-staged low NOx gas burner. The effect of the primary gas injection angle (alpha), the staged gas injection angle (beta) and position of the staged gun (H) on flame size and NO emission was analyzed based on the contours of temperature, stoichiometric mixture fraction, rate of thermal NO and the global NO emission. The predicted results were validated with the experimental measurements of the full scale burner (1.4 MW) at different excess air factors. The results indicate that H is the most important factors affecting the NO emission, followed by beta and alpha respectively. The chemical flame heights increase with the increase of beta and the decrease of H but the effect of alpha is negligible. Finally, alpha = 70, beta = 30 and H = 36 mm are recommended as the optimized results. (C) 2016 Energy Institute. Published by Elsevier Ltd. All rights reserved.
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