Investigation of reheat combustion systems using advanced CFD and modelling

使用先进的 CFD 和建模研究再热燃烧系统

• 批准号: 1949554
• 金额: --
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1949554
• 关键词: Investigation; reheat; combustion; systems; using

Jet-engine reheat systems are prone to thermoacoustic oscillations which can grow in intensity and bring a risk of structural damage. Avoiding such oscillations is essential in practical systems but can lead to performance limitations. Improved understanding of the physical mechanisms behind thermoacoustic oscillations is necessary in order to inform the design of improved reheat systems.This PhD project aims to tackle the problem by using high-fidelity 3D CFD including Large Eddy Simulation together with advanced turbulent combustion modelling. This will allow the geometrical features of real reheat systems to be taken into account, and allow also for proper treatment of the complex thermochemistry of the flame and the flow field.

喷气发动机再热系统容易发生热声振荡，这种振荡的强度会增加，并带来结构损坏的风险。避免这种振荡在实际系统中是必不可少的，但可能导致性能限制。为了改进再热系统的设计，有必要提高对热声振荡背后的物理机制的理解。这个博士项目旨在通过使用高保真三维CFD（包括大涡模拟）以及先进的湍流燃烧模型来解决这个问题。这将允许考虑真实的再热系统的几何特征，并且还允许适当处理火焰和流场的复杂热化学。