QUIET AEROFOILS OF THE NEXT GENERATION

下一代安静机翼

• 批准号: EP/N020413/1
• 负责人: Phillip Joseph
• 金额: $ 36.65万
• 依托单位: University of Southampton
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2016
• 资助国家: 英国
• 起止时间: 2016 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FN020413%2F1
• 关键词: QUIET; AEROFOILS; NEXT; GENERATION

Wind turbines and aircraft are well known to be noisy machines that limits their acceptability to people living close to their operation, such as wind farms and airports. This limitation of course has significant implications for the growth of the aerospace and renewable energy sectors, which is vital to the UK economy as a whole. Wind turbines and aircraft have common noise generation mechanisms, namely the interaction between the airfoil blades and wings with turbulent flow around it. Conventional airfoils have straight leading and trailing edges, which according to recent research by the authors of this proposal, is the noisiest geometrical configuration. Significant noise reductions in airfoil noise have been obtained by introducing serrations (or undulations) into the trailing edge and leading edge geometries. In separate studies, introducing riblets onto the airfoil surface (very fine grooves) have also been shown to produce significant reductions in drag. It is reasonable to assume that airfoil drag and its noise radiation are connected, although this has never been formally investigated. An investigation into this association is one of the objectives of this work.This project will seek to combine these three technologies into a single airfoil design for the simultaneous reduction of leading edge and trailing edge noise whilst preserving aerodynamic performance. This optimisation process will necessitate a fundamental understanding into their noise reductions mechanisms individually in order to ensure that their combined benefits are at least additive or may combine to be more effective than the sum of their benefits individually. The outcome of this work is a new generation of aerofoils with noise control at the heart of their design."

众所周知，风力涡轮机和飞行器是噪音很大的机器，这限制了居住在其操作附近的人（例如风力发电场和机场）对它们的接受度。当然，这一限制对航空航天和可再生能源部门的增长有着重大影响，而这对整个英国经济至关重要。风力涡轮机和飞机具有共同的噪声产生机制，即翼型叶片和机翼之间的相互作用及其周围的湍流。传统翼型具有直的前缘和后缘，根据本提案作者的最新研究，这是噪声最大的几何构型。通过在后缘和前缘几何形状中引入锯齿（或起伏），已经获得了翼型噪声的显著降噪。在单独的研究中，在翼型表面上引入沟槽（非常细的沟槽）也被证明可以显著降低阻力。假定翼型阻力和它的噪声辐射是相联系的是合理的，尽管这一点从未正式地研究过。对这种关联的研究是本研究的目标之一。本项目将寻求将这三种技术联合收割机结合到一个单一的翼型设计中，以同时降低前缘和后缘的噪声，同时保持空气动力学性能。这种优化过程将需要对它们各自的降噪机制有一个基本的了解，以确保它们的组合效益至少是相加的，或者可以联合收割机组合起来比它们各自的效益之和更有效。这项工作的成果是新一代翼型，其设计核心是噪音控制。"

项目成果

Acoustic source distribution on aerofoils and its reconstruction from far-field array measurements

• DOI: 10.1016/j.jsv.2020.115786
• 发表时间: 2021-02
• 期刊: Journal of Sound and Vibration
• 影响因子: 4.7
• 作者: Fabio Casagrande Hirono;P. Joseph;F. Fazi

Leading edge serrations for the reduction of aerofoil self-noise at low angle of attack, pre-stall and post-stall conditions

• DOI: 10.1177/1475472x20978379
• 发表时间: 2021-02-01
• 期刊: INTERNATIONAL JOURNAL OF AEROACOUSTICS
• 影响因子: 1
• 作者: Lacagnina, Giovanni;Chaitanya, Paruchuri;Pinelli, Alfredo
• 通讯作者: Pinelli, Alfredo

On the noise reduction mechanisms of porous aerofoil leading edges

多孔翼型前缘降噪机理研究

• DOI: 10.1016/j.jsv.2020.115574
• 发表时间: 2020
• 期刊: Journal of Sound and Vibration
• 影响因子: 4.7
• 作者: Chaitanya P

Leading-Edge Profiles for the Reduction of Airfoil Interaction Noise

用于降低机翼相互作用噪音的前沿型材

• DOI: 10.2514/1.j058456
• 发表时间: 2020
• 期刊: AIAA Journal
• 影响因子: 2.5
• 作者: Chaitanya P

Slitted leading edge profiles for the reduction of turbulence-aerofoil interaction noise

开缝前缘轮廓可减少湍流-机翼相互作用噪音

• DOI: 10.1121/1.5040972
• 发表时间: 2018
• 期刊: The Journal of the Acoustical Society of America
• 作者: Chaitanya P