【摘要】 利用开发的计算模型对壬烷液滴在氮气中的蒸发过程进行了数值计算,研究了超临界环境条件下环境压力、环境温度以及液滴初始温度对液滴蒸发特性的影响.结果表明:环境压力越高,在蒸发过程中液滴表面温度的升温速度越快;并在蒸发初期液滴直径的增大越显著,同时液滴表面发生迁移的时刻越早.环境温度越高液滴的蒸发寿命越短,液滴表面发生迁移的时刻越早,并且在蒸发初期液滴直径的增大越不明显.随着液滴初始温度的升高液滴的蒸发寿命和迁移时刻几乎均呈线性趋势逐渐减小,液滴初始温度的高低只会使液滴的蒸发过程整体上提前或延后.更多还原

【Abstract】 Evaporation process of n-nonane droplet in nitrogen was numerically calculated via the developed calculation program. The effects of ambient pressure,ambient temperature and initial droplet temperature on the vaporization characteristics were investigated. Results show that,with the increase of ambient pressure,rising of droplet surface temperature is rapid,expansion of droplet in the beginning period is remarkable,and transition time is advanced. With the increase of ambient temperature, vaporization lifetime is decreased,transition time is advanced,and expansion of droplet in the beginning period is unobvious. When initial droplet temperature is increased,vaporization lifetime is decreased and transition time is advanced. The difference in initial droplet temperature will advance or retard the evaporation process.更多还原