Jet-surface interaction noise prediction

射流-表面相互作用噪声预测

• 批准号: 2106010
• 金额: --
• 依托单位: University of Southampton
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2106010
• 关键词: Jet; surface; interaction; noise; prediction

Developing understanding of, and predictive models for, effects of installation on jet noise. In particular effect of pylon wakes.Aircraft noise is an important issue for communities close to busy airports. One particular noise source arises from the interaction between the engine exhaust flow and nearby airframe surfaces (e.g. the high-lift flap for under-wing-mounted turbofan aircraft). More specifically, as the surface trailing edge is brought closer to the flow, the otherwise non-propagating hydrodynamic pressure field produced by the turbulent jet suddenly transforms into a fully-propagating acoustic field, which can be heard both on the ground and within the aircraft cabin. This flow-surface interaction mechanism is also fundamental to several other real-world applications (e.g. wake-window interaction noise from automotive A-pillar wing mirrors) as well as several future integrated engine-wing concepts.Matthew Wellman will join the jet noise team at the Rolls-Royce University Technology Centre. The jet team research all aspects of jet noise using experimental, numerical and analytical approaches. The candidate will support the current research effort looking at the noise produced by jet-flap interaction, which is of significant interest to Rolls-Royce.

发展对安装对喷气噪声影响的理解和预测模型。飞机噪音是忙碌机场附近社区的一个重要问题。一个特殊的噪声源来自发动机排气流和附近的机身表面（例如，用于翼下安装的涡轮风扇飞机的高升力襟翼）之间的相互作用。更具体地说，当表面后缘更靠近流动时，由湍流射流产生的原本非传播的流体动力压力场突然转变成完全传播的声场，该声场在地面上和飞机机舱内都可以听到。这种流面相互作用机制也是其他几种实际应用（例如汽车A柱后视镜的尾流窗相互作用噪声）以及几种未来发动机-机翼一体化概念的基础。Matthew Wellman将加入罗尔斯罗伊斯大学技术中心的喷气噪声团队。喷气机团队使用实验，数值和分析方法研究喷气噪声的各个方面。候选人将支持目前的研究工作，研究喷气襟翼相互作用产生的噪音，这是罗尔斯·罗伊斯公司非常感兴趣的。