Heat and Mass Transfer in Simulations of Fuel Atomisation

燃料雾化过程影响燃气涡轮机燃烧系统性能的几乎所有方面，并且高保真模拟是补充实验结果的有价值的工具。作为CDT的一部分，以前的工作已经开发了一种用于模拟燃料雾化的计算方法，该方法基于耦合水平集流体多相体积方法以及自适应网格细化。目前，这些模拟是不可压缩和等温的，这意味着实际上同时发生的雾化和蒸发过程不能同时模拟。在代表真实的燃烧系统的温度下，燃料的蒸发是一个重要且重要的过程-所有燃料在燃烧之前都应处于蒸汽形式-因此，在现有方法中实现蒸发将允许研究重要的新物理学。该项目将开始调查使用界面解析方法的单个液滴的蒸发，其中液滴的形状是由计算网格解析，并考虑改进，可以更好地确定界面位置。最终的目标是产生模拟的同时雾化和蒸发的液体燃料。

The fuel atomisation process affects nearly all aspects of gas turbine combustion system performance, and high-fidelity simulations are a valuable tool to compliment experimental results. Previous work as part of this CDT has developed a computational method for simulations of fuel atomisation, based on the Coupled Level Set Volume of Fluid multiphase method together with Adaptive Mesh Refinement. Currently, these simulations are incompressible and isothermal which means that the processes of atomisation and evaporation, which in reality occur simultaneously, cannot be simulated at the same time. At temperatures representative of a real combustion system, the evaporation of fuel is a significant and important process - all fuel should be in vapour form before it is combusted - and so enabling evaporation in the existing method will allow significant new physics to be investigated. This project will begin by investigating the evaporation of single droplets using interface resolving methods, in which the shape of the droplet is resolved by the computational mesh, and consider improvements that can be made with better determination of the interface location. The ultimate objective is to produce simulations of simultaneous atomisation and evaporation of liquid fuel.