热力发电2019，Vol.48Issue(2)：59-64,6.DOI:10.19666/j.rlfd.201805093
非对称射流喷嘴MILD氧燃烧模拟研究
Simulation research on MILD oxygen combustion of asymmetric jet nozzle
摘要
Abstract
MILD oxygen combustion technology is a more energy-saving and emission-reducing technology developed from the MILD combustion technology. In order to find a nozzle structure that is more conducive to MILD oxygen combustion, this article has designed a unilateral inclined bell mouth nozzle. Four different nozzle structures were set up by changing the direction of the opening of the asymmetric nozzle horn, and numerical simulations were performed under the same conditions for various parameters. Moreover, from the aspects of speed field, vorticity field, component field and temperature field, the asymmetrical nozzles were analyzed. The results show that, the asymmetric jet nozzles can disperse the jet gas into many micelles with small size. The direction of inclination of the large momentum nozzles in different nozzle structures affects the direction of the flow field and the reflow area. For the nozzle with structure that the inclined surface placed outwards, the diffusion of small size micelles resulting from the dispersion of the airflow is the best, the CO concentration is the minimum, the reflux flue gas has the best O2 dilution effect, and the temperature distribution is the most uniform, so nozzle with this structure is most beneficial to the realization of MILD oxygen combustion.关键词
MILD氧燃烧/非对称射流/喷嘴结构/速度场/涡量场/组分场/温度场/数值模拟Key words
MILD oxygen combustion/asymmetric jet/nozzle structure/velocity field/vorticity field/component field/temperature field/numerical simulation分类
能源科技引用本文复制引用
伍永福,武殿斌,刘中兴,董云芳..非对称射流喷嘴MILD氧燃烧模拟研究[J].热力发电,2019,48(2):59-64,6.基金项目
国家自然科学基金项目(51464041) （51464041）
内蒙古自治区高等学校科学研究项目资助(NJZZ17161) （NJZZ17161）
