中文摘要：

考虑液滴内一维瞬态导热以及液滴、气流热物性随温度与组分的变化，建立了对流热环境中燃油液滴的蒸发计算模型。以柴油液滴为例，通过数值模拟，分析了蒸发过程中液滴内部的瞬态热响应，考察了不同条件下的环境压力效应。结果表明，对流蒸发过程中，燃油液滴内部温度梯度很大，导热作用明显；在温度不同的气流环境中，环境压力效应存在非单调性；压力效应发生转捩的气流温度与液滴初始粒径和气流速度相关。

英文摘要：

The numerical model for fuel droplet evaporation in convective thermal environment was developed, in which the transient one dimensional heat conduction in droplet has been considered along with the dependence of thermal properties of droplet and surrounding gas on temperature and gas components. As an example, the evaporation of diesel oil droplet was simulated numerically. The transient thermal response inside droplet during evaporation and the ambient pressure effects were analyzed. The results show significant temperature gradient inside the evaporating fuel droplet and the effect of heat conduction inside the droplet is obvious. The ambient pressure effects on evaporation are different and non-monotonic. The gas temperature values for pressure effect transition depend on both the initial size of droplet and the initial velocity of gas flow.