Buzz Saw Noise Propogation in Steady Distorted Intake Flows

稳定扭曲进气流中的圆锯噪声传播

• 批准号: 1941794
• 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: 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=studentship-1941794
• 关键词: Buzz; Saw; Noise; Propogation; Steady

Noise is a major environmental impact of civil aviation. Reducing aircraft noise is critical to the growth of air transport and to the future of the UK aircraft industry. This project will focus on the prediction of supersonic fan noise, known colloquially as "buzz-saw" noise, which is generated by high-bypass-ratio turbofan engines. This noise source is particularly apparent at take-off. The key aim will be to develop new prediction methods which can simulate the nonlinear propagation and radiation of sound from turbofan intakes, including its propagation through non-uniform flow and absorption by acoustic lining on the duct walls. The work will involve computational fluid dynamics and computational aeroacoustics, theoretical modelling and validation studies using experimental data from Rolls-Royce fan rig tests.

噪声是民用航空对环境的主要影响。降低飞机噪音对于航空运输的发展和英国飞机工业的未来至关重要。该项目将重点预测超音速风扇噪声，俗称“嗡嗡声”噪声，由高涵道比涡轮风扇发动机产生。这种噪音源在起飞时尤其明显。主要目标是开发新的预测方法，可以模拟涡轮风扇进气口声音的非线性传播和辐射，包括其通过非均匀流动的传播和管道壁上的声学衬里的吸收。这项工作将涉及计算流体动力学和计算气动声学、理论建模和使用劳斯莱斯风扇装置测试的实验数据进行验证研究。