临界温度区域内柴油喷雾燃烧特性模拟  

Numerical Study on Combustion Characteristics of Diesel Spray Crossing Critical Temperature Range

作　　者：包堂堂[1] 邓俊[1] 吴志军[1] 

机构地区：[1]同济大学汽车学院,上海200092

出　　处：《同济大学学报（自然科学版）》2013年第8期1255-1262,共8页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金(51006075;51076118;51106113);新世纪优秀人才支持计划(NCET-10-0605);上海市青年科技启明星计划(跟踪)(11QH1402500)

摘　　要：采用条件矩封闭模型(CMC)与三维计算流体动力学(CFD)软件相耦合,建立了活化热氛围中的柴油喷雾燃烧模型,分析了燃料自燃临界温度随环境压力的变化,并对临界温度附近区域的柴油喷雾燃烧特性进行了研究.结果表明,随着环境压力的增加,自燃临界温度基本维持在1 048K附近.在模拟条件下,当协流温度接近临界温度时,2K的协流温度变化即可引起火焰温度及OH、H、HO2等中间组分的分布产生较大变化,进而对燃烧过程产生较大影响.Conditional moment closure(CMC) model was coupled with the computer fluid dynamics(CFD) software to establish the combustion model of diesel spray in active thermo-atmosphere,the effect of ambient pressure on auto-ignition critical temperature was analyzed,meanwhile the combustion characteristics of diesel spray crossing the critical temperature range were studied.The results show that as the ambient pressure increases,the critical temperature remains around 1 048 K,in simulation conditions,when the co-flow temperature gets close to 1 048 K,2 K's co-flow temperature changes can greatly influence the flame temperature and the distribution of active components such as OH,H,HO2 and so on.

关 键 词：活化热氛围 柴油喷雾 燃烧特性 模拟研究 

分 类 号：TK428.9[动力工程及工程热物理—动力机械及工程]