Prediction and reduction of sound propagation from installed jets

预测已安装的飞机喷气噪声需要对湍流喷气、机翼、襟翼和吊架之间的相互作用进行精确建模。该项目将在最近开发的大涡模拟和声学微扰方程解决方案（APE）耦合框架上取得进一步进展，用于捕获噪声传播。将探索混合 LES-RANS 类型方法（在不太重要的区域）和壁建模 LES（在感兴趣的关键区域，例如喷嘴出口）的潜在组合。该项目还将结合流入近壁和自由流湍流的最新发展/进展。将进一步研究新概念，例如机翼/襟翼上的锯齿和可变面积喷嘴，专门针对射流和襟翼的相互作用。该项目将补充正在进行的 ACAPELLA 项目，并与劳斯莱斯公司、剑桥大学和南安普顿大学合作。

Prediction of installed aircraft jet noise requires accurate modelling of the interaction between the turbulent jet, wing, flap and pylon. The project will make further progress on a recently developed coupled framework of Large-Eddy Simulation and Acoustic Perturbation Equations solution (APE) for capturing the noise propagation. A potential combination of hybrid LES-RANS type methods (in the less important area) and wall modelled LES (in the key area of interest, e.g. nozzle exit) will be explored. The project will also work in conjunction with the latest development/progress on inflow near-wall and free-stream turbulence. Novel concepts, such as serration on the wing/flap and variable area nozzle, specifically targeting the interaction of jet and flap will be further examined.The project will complement the ongoing ACAPELLA project and work in partnership with Rolls-Royce plc, Cambridge and Southampton Universities.