Bypass integration for very large bypass ratio engines with gearboxes or other special thermal management requirements

适用于具有变速箱或其他特殊热管理要求的超大涵道比发动机的旁路集成

• 批准号: 2640742
• 金额: --
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2640742
• 关键词: Bypass; integration; very; large; bypass

The incorporation of a power gearbox into large civil turbofan engines results in a large increase in the heat that must be dissipated by the engine's thermal management system. A significant portion of this is likely to be rejected to the bypass air via heat exchanger. This research project aims to use computational techniques to improve the understanding of the thermal/aerodynamic impacts of these heat exchangers, such as:-The effect upon bypass thrust performance of rejecting heat to the bypass flow-The heat transfer performance resulting from the detailed flow within the heat exchanger itself-The aerodynamic interaction between the heat exchanger and the surrounding components of the bypass ductThe domain of interest includes features of both meter scale (bypass duct) and sub-millimetre scale (HX matrix) of importance. Adequate resolution of such using "conventional" CFD packages would require huge mesh dimensions, resulting in a computational cost which is infeasible in a design environment. As such, novel/specialised computational techniques are to be developed such that new heat exchanger geometries/integrations can be economically simulated. Such methods are to be validated against established experimental data

在大型民用涡扇发动机中加入动力变速箱会导致大量的热量增加，这些热量必须通过发动机的热管理系统消散。其中很大一部分可能通过热交换器被排除到旁路空气中。该研究项目旨在使用计算技术来提高对这些热交换器的热/空气动力学影响的理解，例如：-对旁路推力性能的影响，拒绝热量到旁通流-传热性能产生的详细流动在热交换器本身-热交换器和旁通管道周围组件之间的空气动力学相互作用感兴趣的领域包括米尺度（旁通管道）和亚毫米尺度（HX矩阵）的重要特征。使用“传统”CFD软件包来获得足够的分辨率需要巨大的网格尺寸，这导致计算成本在设计环境中是不可行的。因此，需要开发新的/专门的计算技术，以便可以经济地模拟新的热交换器几何形状/集成。这些方法将根据已建立的实验数据进行验证