Abstract Dramatic changes to aircraft design are on the horizon to meet ambitious efficiency and emissions targets. This will bring about changes in the role and design of aero-engines, requiring a greater degree of high fidelity, coupled modelling. To bridge a wide range of spatial and temporal scales, modern turbomachinery design employs a wide range of modelling fidelities during different design stages and for different engine components. High fidelity methods such as Large Eddy Simulation (LES) have been successfully applied to numerous complex flows where traditional Reynolds-Averaged Navier-Stokes (RANS) modelling does not sufficiently represent flow physics to be consistently accurate. Using LES and, for high Reynolds number flows, hybrid LES-RANS, critical knowledge has been extracted and exploited both to inform designs and to improve lower order modelling. It seems certain that uptake of high fidelity methods will continue at a rapid pace. Here we explore some of the future challenges facing turbomachinery simulation using LES. These include use of higher order schemes, internal and external zonalisation and coupling, exploitation of hardware and pre and post-processing. Although these pose technological barriers, these will enable unexplored design space to be traversed with confidence, resulting in cleaner, quieter, and more efficient aircraft.

中文翻译：

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涡轮机械仿真挑战和未来

摘要 为了实现雄心勃勃的效率和排放目标，飞机设计即将发生巨大变化。这将导致航空发动机的作用和设计发生变化，需要更高程度的高保真耦合建模。为了连接广泛的空间和时间尺度，现代涡轮机械设计在不同的设计阶段和不同的发动机部件中采用了广泛的建模保真度。大涡模拟 (LES) 等高保真方法已成功应用于众多复杂流动，其中传统的雷诺平均 Navier-Stokes (RANS) 建模无法充分表示流动物理，因此无法始终保持准确。使用 LES，对于高雷诺数流，混合 LES-RANS，关键知识已被提取和利用来为设计提供信息并改进低阶建模。似乎可以肯定的是，高保真方法的采用将继续快速发展。在这里，我们探讨了使用 LES 进行涡轮机械仿真面临的一些未来挑战。这些包括使用高阶方案、内部和外部分区和耦合、硬件开发以及预处理和后处理。尽管这些构成了技术障碍，但它们将使人们能够自信地穿越未开发的设计空间，从而产生更清洁、更安静和更高效的飞机。内部和外部分区和耦合、硬件开发以及预处理和后处理。尽管这些构成了技术障碍，但它们将使人们能够自信地穿越未开发的设计空间，从而产生更清洁、更安静和更高效的飞机。内部和外部分区和耦合、硬件开发以及预处理和后处理。尽管这些构成了技术障碍，但它们将使人们能够自信地穿越未开发的设计空间，从而产生更清洁、更安静和更高效的飞机。