Optimising wall-turbulence spectra for noise control

优化壁湍流谱以控制噪声

• 批准号: 2482739
• 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: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2482739
• 关键词: Optimising; wall; turbulence; spectra; noise

The key idea for this project is to work backwards to optimisewall-turbulence noise reduction technologies. Usually the forwardapproach requires generating an idea then observing how it altersthe wall pressure spectrum and thus the radiated noise (currentexample include finlets, canopies, structured roughness). Thisproject would flip that idea on its head; what wall pressurespectrum produces the lowest radiated noise (subject to it stillbeing turbulent), and can we generate with designs that create thatspectrum? In doing so, an optimal wall covering could be developedthat minimises wall-turbulence noise.

该项目的关键思想是逆向优化壁面湍流降噪技术。通常，向前的方法需要产生一个想法，然后观察它如何改变壁压力谱，从而辐射噪声（目前的例子包括小鳍，冠层，结构粗糙度）。这个项目将颠覆这个想法；什么壁压谱产生最低的辐射噪声（如果它仍然是湍流的），我们可以用产生该频谱的设计来产生？这样，就可以开发出一种最佳的壁面覆盖物，使壁面湍流噪声最小化。