纯麻疯树生物柴油单液滴蒸发特性研究  

Evaporation characteristics of a single droplet of pure Jatropha curcas biodiesel

作　　者：姜熠豪 姜根柱[1] 高建伟 闫晨朝 JIANG YiHao;JIANG GenZhu;GAO JianWei;YAN ChenZhao(College of Mechanical Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China)

机构地区：[1]江苏科技大学机械工程学院,镇江212003

出　　处：《北京化工大学学报（自然科学版）》2024年第1期23-29,共7页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：江苏省研究生创新基金项目(SJCX22_1930)。

摘　　要：为了探明麻疯树生物柴油(JME)燃料的蒸发过程,通过碱性酯交换反应制备了JME,并采用热电偶挂滴技术研究了在673 K和873 K的环境温度下JME单液滴的膨化和蒸发特性,分析了环境温度对JME液滴蒸发过程的影响。结果表明,JME液滴的蒸发过程分为瞬时加热阶段、波动蒸发阶段和平衡蒸发阶段;在673 K和873 K下JME液滴的蒸发特性不同,673 K下液滴的蒸发只存在膨胀过程,没有发生微爆,液滴寿命较长,而873 K下液滴出现了微爆现象,液滴寿命较短;环境温度的升高可以提高JME液滴的蒸发速率,这是因为JME中挥发性成分较多,其挥发后形成气泡,在高温下液滴发生膨化和微爆,这样可以更好地实现空气-燃料混合,提高柴油机的燃烧效率。Jatropha curcas biodiesel(JME)fuel was prepared by an alkaline transesterification reaction.The expansion and evaporation characteristics of JME single droplets at ambient temperatures of 673 K and 873 K were studied using the thermocouple hanging drop technique,and the influence of the ambient temperature on the evaporation process of JME droplets was analyzed.The results show that the evaporation of JME droplets is divided into an instantaneous heating stage,a fluctuating evaporation stage and an equilibrium evaporation stage.The evaporation characteristics of JME droplets at 673 K and 873 K are significantly different.The evaporation of droplets at 673 K only has an expansion process with no micro-explosion,and the life of the droplets is longer.At 873 K,the droplet undergoes a micro-explosion,and the droplet life is shorter.An increase in ambient temperature increases the evaporation rate of JME droplets because there are many volatile components in JME,which form bubbles after volatilization,and the droplets expand and explode at high temperatures.In this way,better air-fuel mixtures can be obtained and the combustion efficiency of diesel engines can be improved.

关 键 词：麻疯树生物柴油 液滴蒸发 膨胀 微爆 

分 类 号：TK42[动力工程及工程热物理—动力机械及工程]