电场调控生物柴油液滴燃烧行为  

Electric field-regulating combustion behavior of biodiesel droplet

作　　者：左磊 王军锋[1,2] 高健 王道睿 ZUO Lei;WANG Junfeng;GAO Jian;WANG Daorui(School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China;School of Energy and Power Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013 [2]重庆大学能源与动力工程学院,重庆400044

出　　处：《化工学报》2024年第8期2983-2990,共8页CIESC Journal

基　　金：国家自然科学基金项目(51761145011);江苏省科技创新支撑计划国际科技合作/港澳台科技合作——“一带一路”创新合作项目(BZ2022016)。

摘　　要：电场作用下的液滴燃烧是研究静电喷雾燃烧的基础。设计搭建了电场作用下燃料液滴燃烧实验装置,通过可视化手段研究了竖直电场中生物柴油液滴的燃烧行为,分析了不同电场度下的火焰形貌、液滴形态演变特征及液滴燃烧规律。结果表明,电场力与自然浮力的竞争决定了火焰形貌,随着电场强度增大,向上火焰、准球形火焰和向下火焰相继出现,表现为上火焰高度减小、下火焰高度增大、火焰宽度先增大后减小、火焰锋面面积先减小后增大,其最大变化幅度依次为69.9%、243.1%、17.0%、10.9%。由于火焰锋面是燃料蒸气和氧气的反应区域,液滴的燃烧持续期随着电场强度增大而呈现先增大后减小的趋势,最大变化幅度为18.1%。Droplet combustion in an electric field is the research basis of electrostatic spray combustion.An experimental setup of fuel droplet combustion in the electric field is constructed.The combustion behavior of the biodiesel droplet is investigated by using the visualization method.The effects of electric field strength on flame and droplet morphologies as well as the droplet combustion law are discussed.The results show that the competition between the electric field force and natural buoyancy determines the flame morphology.As the electric field intensity increases,upward flames,quasi-spherical flames and downward flames appear one after another.It manifests that the upper flame height decreases,the lower flame height increases,the flame width first increases and then decreases,the flame front area first decreases and then increases,and their maximum change amplitudes are 69.9%,243.1%,17.0%and 10.9%respectively.As the flame front is the reaction area between fuel vapor and oxygen,increasing the electric field strength leads to a successive increase and decrease in the combustion duration of the droplet with a maximum variation of 18.1%.

关 键 词：生物柴油 多相流 界面 电场 液滴燃烧 火焰形貌 燃烧持续期 

分 类 号：TK6[动力工程及工程热物理—生物能]