中文摘要：

引言 液体燃料通过喷射进入内燃机的汽缸或喷气发动机的透平中燃烧产生热能。近年来能源危机加剧及减排CO2以保护环境意识提高,促使研究者们采用新的技术提高化石燃料的燃烧效率,其中对单个液滴燃烧物理过程的深刻了解是改进喷射燃烧为特征的内燃机械能量利用效率的基本。对液滴燃烧过程的数值及实验研究已经有几十年。

英文摘要：

Understanding the combustion process of a single droplet is helpful to improve the design for internal combustion engine.The volume of fluid（VOF）formulation is applied to model the combustion process of an n-decane droplet in room and high temperature（300 K,633 K,and 1000 K）convective air streams.The flow fields for both phases are obtained with the axisymmetrical model.The chemical reaction is modeled with the one-step finite-rate mechanism and the physical properties of gas mixture are species and temperature dependent except for surface tension.A mass transfer model applicable to the VOF calculations due to vaporization of the liquid phase is developed in consideration with the fluctuation of the liquid surface.The model is validated by checking the burning rate constants,which accord well with the experimental data in literature.The Stefan flow is also clearly captured by the calculations.The results verify the feasibility of the VOF CFD formulation as well as the mass transfer model due to vaporization.