麻风树油甲酯生物柴油着火与火焰发展特性研究  

Study on the Development Characteristics of Jatropha Oil Methyl Ester Biodiesel Fire and Flame

作　　者：姜熠豪 姜根柱[1] 张衍 张杰 JIANG Yihao;JIANG Genzhu;ZHANG Yan;ZHANG Jie(College of Mechanical Engineering,Jiangsu University of Science&Technology,Zhenjiang 212100,China)

机构地区：[1]江苏科技大学机械工程学院,江苏镇江212003

出　　处：《纤维素科学与技术》2023年第2期43-51,共9页Journal of Cellulose Science and Technology

基　　金：江苏省研究生创新基金项目(No.SJCX22_1930)。

摘　　要：基于高压可视化定容燃烧弹试验台,利用高速相机和光学系统研究了在高压环境条件下麻风树油甲酯(JME)燃料着火与火焰发展特性。分析了燃烧在不同工况下,燃油的点火延迟和火焰浮起长度随喷射时间发展的变化规律。结果表明:在环境温度为773K,环境密度为21 kg/m^(3)工况下,随着氧浓度的增加,低氧浓度区域点火延迟先减少,在高氧浓度区域时基本保持不变,而在823 K的工况下则相反。而当氧气含量为15%,环境温度为823 K时,火焰浮起长度随环境密度增加而减小,相较于773K,高温的火焰浮起长度始终小于低温燃料的火焰浮起长度,是由于环境温度越高喷雾卷吸获得的内能越多,可燃混合气形成的速度加快,导致气相喷雾贯穿距增加,从而火焰浮起长度增加。The ignition and flame development characteristics of jatropha methyl ester(JME)fuel under high-pressure environmental conditions were investigated based on a high-pressure visualized fixed-volume combustion bomb test stand using a high-speed camera and optical system.The ignition delay and flame float length of the fuel with the development of injection time were analyzed for combustion under different working conditions.The results show that at an ambient temperature of 773 K and an ambient density of 21 kg/m^(3),the ignition delay decreases first in the low oxygen concentration region as the oxygen concentration increases,and remains basically the same in the high oxygen concentration region,while the opposite is true at the operating condition of 823 K.And when the oxygen content is 15%and the ambient temperature is 823 K,the flame float length decreases with the increase of ambient density,compared with 773 K,the flame float length of high temperature is always smaller than the flame float length of low temperature fuel,which is due to the higher ambient temperature the more internal energy obtained by spray roll absorption,the faster the formation of combustible mixture,resulting in the increase of gas phase spray penetration distance and thus the flame float length.

关 键 词：生物柴油 麻风树油甲酯 雾化特性 喷雾贯穿距 火焰浮起长度 

分 类 号：TK428.9[动力工程及工程热物理—动力机械及工程]