涡流运动对全氧MILD燃烧的影响  

Effect of Eddy Current Motion on Combustion of Total Oxygen MILD

作　　者：伍永福[1] 吉鸿煜 郭长鹏 王振峰[2] 刘中兴 赵爽 WU Yongfu;JI Hongyu;GUO Changpeng;WANG Zhenfeng;LIU Zhongxing;ZHAO Shuang(School of Energy and Environment,Inner Mongolia University of Science and Technology,Baotou 014010,Inner Mongolia Municipality,China;Key Laboratory of Green Extraction&Efficient Utilization of Light Rare-Earth Resources,Ministry of Education(Inner Mongolia University of Science and Technology),Baotou 014010,Inner Mongolia Municipality,China)

机构地区：[1]内蒙古科技大学能源与环境学院,内蒙古自治区包头市014010 [2]轻稀土资源绿色提取与高效利用教育部重点实验室(内蒙古科技大学),内蒙古自治区包头市014010

出　　处：《中国电机工程学报》2022年第23期8608-8617,共10页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51904069,51464041)。

摘　　要：由于全氧弥散燃烧(moderate&intense low oxygen dilution,MILD)技术燃烧效率高,环境污染低等特点,成为现代清洁燃烧技术重要研究方向。文中用数值模拟与实验相结合的方法,在流量确定的情况下,通过改变动量比来改变炉膛内涡流运动情况,借助涡结构识别方法,研究涡流运动对气体混合以及全氧MILD燃烧效率的影响。结果表明:炉膛内气体的涡流运动可以很好的反映内部燃烧的混合情况,炉膛内涡流运动主要集中在炉膛初始段,也是炉膛的主要燃烧区域。当炉膛内有强度的涡流运动区间较大时,说明炉膛内气体的混合区域较大,全氧MILD燃烧效果较好,反之则不利于全氧燃烧实现MILD状态。With its high combustion efficiency and low environmental pollution,oxy-MILD(moderate&intense low oxygen dilution)combustion is considered as an important research direction for modern clean combustion technology.Combining numerical simulation with experiments,this paper varied the vortex motion in the furnace chamber by changing the momentum ratio at a given flow rate.The method of vortex structure identification was adopted to explore the effect of vortex motion on gas mixing and oxy-MILD combustion efficiency.As the results indicate,the vortex motion of gas in the furnace chamber well reflects the mixing of internal combustion,and this motion frequently occurs in the initial section of the chamber,i.e.,the main combustion area in the furnace.At large interval of intense vortex motion in the furnace chamber,there is a large gas mixing area in the chamber,with effective oxy-MILD combustion.Otherwise,it is not conducive to the realization of oxy-fuel combustion and the MILD state.

关 键 词：全氧弥散燃烧 涡流运动 动量比 涡结构识别 方法 

分 类 号：TK16[动力工程及工程热物理—热能工程]