Aerofoil noise reduction by active flow control

通过主动流量控制降低翼型噪音

• 批准号: 1936262
• 金额: --
• 依托单位: University of Cambridge
• 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-1936262
• 关键词: Aerofoil; noise; reduction; active; flow

Trailing-edge noise, generated by a turbulent boundary layer scattering off the rear of an aerofoil/blade in flow, is an unavoidable and often large contributor to overall aircraft and wind turbine noise. To reduce this noise various permanent (passive) adaptations to blade surfaces can be made, however due to the very different regimes faced it is difficult to design a new aerofoil which is acoustically advantageous in all possible flow regimes. This project therefore seeks to understand the noise reduction possibilities of active flow control, which can be turned on or off at will and therefore can tackle the most important flow conditions which generate large amounts of unwanted noise, such as during aircraft landing.

后缘噪声是由湍流边界层在气流中从翼型/叶片后部散射而产生的，是不可避免的，并且通常是整个飞机和风力涡轮机噪声的主要贡献者。为了减少这种噪声，可以对叶片表面进行各种永久（被动）适应，然而，由于所面临的非常不同的状态，很难设计出在所有可能的流动状态中声学上有利的新翼型。因此，该项目旨在了解主动流动控制的降噪可能性，主动流动控制可以随意打开或关闭，因此可以解决产生大量不必要噪声的最重要的流动条件，例如在飞机着陆期间。

项目成果

Fast and spectrally accurate numerical methods for perforated screens (with applications to Robin boundary conditions)

穿孔屏幕的快速且光谱精确的数值方法（应用于 Robin 边界条件）

• DOI: 10.1093/imamat/hxaa021
• 发表时间: 2020
• 期刊: IMA Journal of Applied Mathematics
• 影响因子: 1.2
• 作者: Colbrook M

A Semi-analytic and Experimental Study of Porous Leading Edges

多孔前缘的半解析和实验研究

• DOI: 10.2514/6.2019-2552
• 发表时间: 2019
• 作者: Priddin M

Scattering by porous aerofoil adaptations

通过多孔翼型适应性进行散射

• DOI: 10.17863/cam.91210
• 发表时间: 2022
• 作者: Priddin M

Applications of an Iterative Wiener-Hopf Method to Aeroacoustics

迭代维纳-霍普夫方法在气动声学中的应用

• DOI: 10.2514/6.2019-2401
• 发表时间: 2019
• 作者: Priddin M

Applying an iterative method numerically to solve n × n matrix Wiener-Hopf equations with exponential factors

应用数值迭代方法求解具有指数因子的 n × n 矩阵 Wiener-Hopf 方程

• DOI: 10.17863/cam.47740
• 发表时间: 2020
• 作者: Priddin M