摘要
为了掌握液体燃料喷雾撞击燃烧过程中不同流场条件对燃烧过程的关键影响因素及其影响规律,进而探索不同流场条件对喷雾撞击燃烧过程的强化机理,采用数值模拟方法对同轴对置式双喷嘴撞击流喷雾燃烧进行研究.结果表明:燃料质量流量相同时,双喷嘴撞击流对燃烧存在明显的强化作用;随着入口速度的增加,燃料蒸发与反应速率提高,燃烧温度增加;两喷嘴存在一个最佳间距,使得燃烧效果最佳,随着喷嘴间距的增加或减小,燃烧反应都会减弱;喷嘴夹角为180°时,燃烧效果最佳,随着喷嘴夹角的减小,蒸发速率会增加,燃烧反应会受阻.
To explore the key influence factors and influence rules of flow field conditions on the liquid-fuel spray impinging combustion process and discuss the enhancement mechanism of flow field conditions on spray impinging combustion process, the numerical simulation method was used to investigate the spray combustion by impinging streams for the coaxial opposed double-nozzle. The results show that the double-nozzle impinging stream has obvious strengthening effect on the combustion under the same fuel mass flow rate. As the inlet velocity is increased, the fuel evaporation and reaction rates are increased with increased combustion temperature. There is an optimum spacing between the two nozzles to obtain the best combustion results. As the nozzle spacing is increased or decreased, the combustion reaction is weakened. When the nozzle angle is 180°, the best combustion effect can be obtained. As the angle between the nozzles is decreased, the evaporation rate is increased, and the combustion reaction is hindered.
作者
杜敏
卢麒丞
宋亮
黄彬
罗明
王助良
DU Min;LU Qicheng;SONG Liang;HUANG Bin;LUO Ming;WANG Zhuliang(School of Energy and Power Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China)
出处
《江苏大学学报（自然科学版）》
EI
CAS
北大核心
2019年第6期621-628,共8页
Journal of Jiangsu University：Natural Science Edition
基金
国家自然科学基金资助项目(51306075)
江苏省高校自然科学研究面上项目(13KJB470002)
关键词
喷雾燃烧
撞击流
流场
数值模拟
影响规律
spray combustion
impinging streams
flow field
numerical simulation
influence rule
