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向后工作到优化壁湍流降噪技术。通常，前向方法需要产生一个想法，然后观察它如何改变壁压谱，从而改变辐射噪声（当前示例包括鳍，檐篷，结构粗糙度）。这个项目将颠覆这个想法;什么样的壁压频谱产生最低的辐射噪声（前提是它仍然是湍流），我们能用创造那个频谱的设计来产生吗？在这样做时，可以开发最佳的墙壁覆盖物，使墙壁湍流噪声最小化。