摘要
采用单液滴非平衡蒸发的数学物理模型,研究了静止环境中甲醇液滴的瞬态蒸发特性,获得了不同环境压力、环境温度和液滴的初始温度条件下液滴半径和液滴温度的变化规律.结果表明,随着环境压力的升高,液滴所达到平衡蒸发温度上升,在环境温度高于临界温度时,液滴蒸发加快,而在环境温度低于液滴临界温度时,液滴蒸发减慢.随着环境温度的上升,液滴蒸发速度加快,液滴达到的平衡温度上升.液滴初始温度对瞬态加热阶段的蒸发有一定的影响,而对平衡蒸发阶段的蒸发几乎没有影响.
For a single methanol droplet in quiescent environment,the evaporation characteristics were simulated using the non-equilibrium evaporation model.The effects of the ambient pressure,temperature,and the droplet radius and temperature at the initial droplet temperature condition were investigated.The results indicate that the droplet equilibrium temperature increases with the increase of ambient pressure.The droplet evaporates faster when the ambient temperature is lower than the critical temperature and it evaporates slower when the ambient temperature is higher than the critical temperature.With the ambient temperature rising,the droplet evaporates faster and the equilibrium temperature increases.The initial droplet temperature has certain influences on the droplet vaporization in transient heating process and has little effect on the droplet vaporization in equilibrium process.
出处
《江苏大学学报(自然科学版)》
EI
CAS
北大核心
2010年第3期269-272,共4页
Journal of Jiangsu University:Natural Science Edition
基金
江苏省高校自然科学重大基础项目(08KJA470001)
江苏大学高级专业人才科研启动基金资助项目(09JDG007)
关键词
甲醇
液滴蒸发
环境压力
临界温度
非平衡模型
methanol
droplet evaporation
ambient pressure
critical temperature
non-equilibrium model
作者简介
倪培永(1977-),男,江苏徐州人,博士(npy614@ujs.edu.cn),主要从事内燃机燃烧及排放控制研究.
王忠(1961-),男,江苏镇江人,教授,博士生导师(wangzhong@ujs.edu.cn),主要从事内燃机燃烧及排放控制研究.