掺醇生物柴油混合燃料蒸发特性  

Evaporation Characteristics of Ethanol Blended Biodiesel Fuel for Generators

作　　者：危昊翔 王筱蓉[1] 姜根柱[1] 黄晨峻 张溟睿 WEI Haoxiang;WANG Xiaorong;JIANG Genzhu;HUANG Chenjun;ZHANG Mingrui(School of Mechanical Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,Jiangsu,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：《南方能源建设》2024年第6期52-58,共7页Southern Energy Construction

基　　金：江苏省基础研究计划(自然科学基金)青年基金项目“预热长碳链脂肪酸油高压蒸发特性及冷启动低温着火特性研究”(BK20180982)。

摘　　要：[目的]在当前能源需求增长和提倡环保的大背景下,寻找替代传统燃油发电的能源成为重要研究课题,通过研究燃料蒸发特性可找到特性更佳的燃料。[方法]采用液滴悬挂实验研究673 K和773 K环境温度时,添加0%、20%、30%、50%乙醇含量的油酸甲酯混合燃料液滴的蒸发特性。[结果]结果表明,环境温度从673 K升高至773 K时,混合液滴的蒸发速率提高。并且随着乙醇含量的不断增加,两个环境温度的液滴蒸发速率相差越大。在较低环境温度时,液滴的蒸发过程较平稳,液滴蒸发速率呈现逐渐减小的趋势,乙醇的添加导致液滴平衡蒸发阶段延长,增加了蒸发时间,抑制蒸发过程。而在较高环境温度时,蒸发过程波动较大,液滴蒸发速率呈现逐渐增长的趋势,并在50%乙醇含量时达到最大值。乙醇的添加导致微爆炸现象的发生,缩短了蒸发时间,促进蒸发过程。同时提高环境温度和乙醇含量,有利于液滴微爆炸现象的发生以及强度和次数的增加。[结论]基于液滴悬挂实验的油酸甲酯和乙醇混合液滴蒸发特性的实验结果,为相关燃料研究和应用提供了重要的数据支撑和参考。[Introduction]In the current context of increasing energy demand and environmental conservation advocacy,it is necessary to seek alternative energy sources for traditional fuel generators,and better fuels can be identify by studying the evaporation characteristics of fuels.[Method]The droplet suspension experiments were conducted to investigate the evaporation characteristics of droplets of methyl oleate fuel with ethanol contents of 0%,20%,30%,and 50%at the ambient temperature of 673 K and 773 K.[Results]The results indicate that as the ambient temperature increases from 673 K to 773 K,the evaporation rate of the blended droplets rises.Furthermore,with the continuous increase in ethanol contents,the difference in droplet evaporation rates between the two ambient temperatures becomes more pronounced.At lower ambient temperatures,the evaporation process of the droplets is relatively stable,with the droplet evaporation rate showing a gradual decrease trend.The addition of ethanol leads to an extension of the droplet's equilibrium evaporation stage,increasing the evaporation time and inhibiting the evaporation process.Conversely,at higher ambient temperatures,the evaporation process exhibits greater fluctuations,with the droplet evaporation rate showing a gradual increase trend and reaching its maximum at the ethanol content of 50%.The addition of ethanol induces micro-explosion events,reducing the evaporation time and enhancing the evaporation process.Moreover,increasing the ambient temperature and ethanol content promotes the occurrence,intensity,and frequency of micro-explosion events in droplets.[Conclusions]Based on the experimental results of droplet suspension experiments on the evaporation characteristics of methyl oleate and ethanol blended droplets,this study provides important data support and references for related fuel research and applications.

关 键 词：发电机 蒸发特性 油酸甲酯 乙醇 微爆炸 

分 类 号：TK6[动力工程及工程热物理—生物能] TE626[石油与天然气工程—油气加工工程]