Prediction and reduction of sound propagation from installed jets

预测和减少已安装喷气机的声音传播

• 批准号: 1965979
• 金额: --
• 依托单位: Loughborough University
• 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-1965979
• 关键词: Prediction; reduction; sound; propagation; installed

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.

安装飞机喷气噪声的预测需要精确的模型之间的相互作用的湍流射流，机翼，襟翼和挂架。该项目将在最近开发的用于捕获噪声传播的大涡模拟和声学扰动方程解（APE）的耦合框架上取得进一步进展。将探索混合LES-RANS型方法（在不太重要的区域）和壁面模拟LES（在关键的感兴趣区域，例如喷嘴出口）的潜在组合。该项目还将与流入近壁和自由流湍流的最新发展/进展结合起来。新的概念，如机翼/襟翼上的锯齿和变面积喷管，特别是针对喷气和襟翼的相互作用，将进一步研究。该项目将补充正在进行的ACAPELLA项目，并与罗尔斯-罗伊斯公司，剑桥和南安普顿大学合作。