【摘要】 建立了二甲基醚（DME）在N₂介质中超临界蒸发的数学模型。采用状态方程法计算了DME-N₂体系的高压气液相平衡,在相关文献的基础上得出一套流体热物性和输运参数的计算方法。完成了DME超临界蒸发过程的数值模拟。从数值模拟的结果讨论了超临界条件下环境压力、环境温度和液滴运动等因素对液滴升温、滴径变化以及生存时间的影响．更多还原

【Abstract】 A mathematical model was established for the supercritical evaporation of dimethyl ether （DME）droplets in nitrogen（N₂）.A detailed research of the selection and calculation of Thermophysical and transportation parameters under supercritical condition was carried out.A method of equation of state（EOS）was adopted to solve the high-pressure VLE.The effects of ambient pressure and temperature,as well as droplet motion on droplet heating-up,droplet radius changing ratio and droplet lifetime were discussed.更多还原