Computational fluid dynamics modelling of sprays of liquids into gases and vapours

该博士项目研究液体喷射到气体中的运动学和热行为，特别关注用于控制压水核电站操作压力的稳压器类型的动力学。主要目标是开发一种喷雾计算模型，该模型能够再现给定喷水输入（注入水的总质量和液滴大小分布）或给定加热功率输入时增压器的传热和压力响应。CFD模型将基于曼彻斯特大学先前开发的喷雾建模方法，该方法通过求解液滴尺寸分布函数的前四个时刻的建模传输方程来表示喷雾。这允许比传统的离散液滴建模的随机类型更有效的计算解决方案。博士学位的一个重要方面将是根据学术文献中的实验数据和曼彻斯特大学的喷雾实验结果验证喷雾模型。在后期阶段，博士学位将包括在劳斯莱斯的实习，该模型将在当地IT系统上实施，并应用于工业相关的几何形状和条件。

This PhD project addresses the kinematic and thermal behaviour of sprays of liquids into gases, with a particular focus on the dynamics of the type of pressurisers used to control the operating pressure in pressurised water nuclear power stations. The main objective is the development of a computational model of sprays that is capable of reproducing the heat transfer and pressure response of the pressuriser to a given water spray input (total mass of injected water and droplet size distribution), or to a given heating power input. The CFD model will be based on the approach to spray modelling previously developed at the University of Manchester in which the spray is represented by solving modelled transport equations for the first four moments of the droplet size distribution function. This allows for a more computationally efficient solution than the traditional stochastic type of discrete droplet modelling. A substantial aspect of the PhD will be to validate the spray model against experimental data from academic literature and from the results of spray experiments at the University of Manchester. In the later stages, the PhD will include a placement at Rolls-Royce, where the model will be implemented on the local IT system and applied to geometries and conditions of industrial relevance.