Research into Buffet of Low Pressure System Outlet Guide Vanes

新的航空发动机结构包括具有低尖端速度和低压比的先进风扇。这些风扇设计集成在具有挑战性的发动机架构中，包括短纤细、进气积极的设计以及与出口导向叶片(OGV)和塔架之间的轴向距离缩短。风机子系统的可操作性可能会受到OGV抖动的限制，特别是在非设计和侧风条件下。这项工作将探索利用HYRID LEAN模拟OGV抖振的可能性，并使RR能够加深对控制抖振的关键参数的理解，在设计阶段建立评估标准，并潜在地改进OGV设计。

Novel aero-engine architectures include advanced fans with low tip speeds and low pressure ratios. These fan designs are integrated in challenging engine architectures comprising of short slim-line aggressive intake designs and reduced axial distance from Outlet Guide Vanes (OGV) and pylon. Fan sub-system operability could be limited by OGV buffet, especially at off-design and crosswind conditions. This work will explore the possibility of simulating bufet of OGVs using Hyrid LES-RANS and enable RR to develop an understanding of key parameters controlling buffet, establish assessment criteria at design stage and potentially improve OGV design.