Airfoil and Bluff-body Noise

翼型和钝体噪声

• 批准号: RGPIN-2014-04111
• 负责人: Moreau, Stephane
• 金额: $ 3.37万
• 依托单位: Université de Sherbrooke
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=660176
• 关键词: Airfoil; Bluff; body; Noise

The present research proposal focuses on airfoil and bluff-body noise at low and high subsonic speed. These two canonical problems are the building blocks for the future prediction of low and high speed fan noise involved in most ventilation and propulsion systems, and airframe noise generated by high lift devices or landing gears. The proposal should then respond to important environmental and health issues related to increasing air traffic and noisy work conditions. It should be complementary to the industrial Chair in Aeroacoustics at Université de Sherbrooke and the Business-Led projects which rather focus on the noise sources in turbo-engine and ventilation systems, and on airframe noise. It should then strengthen the transportation industry that is one of the key economic sectors of Canada. It is directed towards developing (1) numerical and analytical tools to simulate and predict aeroacoustic phenomena generated by the interaction of a flow with a solid surface, from the sources of noise (i.e. the emission phase) to their reception by a human being (i.e. the propagation phase), and (2) innovative noise control concepts and technologies to reduce these nuisances. Ultimately these prediction tools and noise control techniques will be applied at the system level to reduce the noise from low and high speed fans, high lift devices and landing gears. They will be integrated in their design process to guarantee that noise specifications of these products and new environmental regulations are met. Airfoil and bluff body noise sources can be divided into two main themes: self-noise and interaction noise which will yield both tonal and broadband contributions. In both cases, detailed compressible unsteady numerical simulations are performed to predict the noises sources and the near-field sound accurately and an acoustical analogy is used to propagate this sound to the far field. The resulting results are compared with measurements performed in open-jet anechoic wind tunnels to validate the improved acoustic analytical models.

本研究建议的重点是低和高亚音速速度的机翼和Blueff体噪声。这两个规范问题是大多数通风和推进系统中涉及的低速和高速风扇噪声的未来预测的基础，以及由高升降机设备或起落架产生的机身噪声。然后，该提案应应对与增加空中交通和噪音工作条件有关的重要环境和健康问题。它应该完全归功于SherbrookeUniversitéDe Sherbrooke的航空声学工业主席，以及以业务为主导的项目，该项目侧重于涡轮引擎和通风系统的噪声源以及机身噪音。然后，它应该加强是加拿大主要经济部门之一的运输业。它是针对开发（1）数值和分析工具，以模拟和预测流动与固体表面的相互作用所产生的空气声现象，从噪声源（即发射阶段）到人类的接收源（即宣传阶段），以及（2）创新的噪声控制概念和技术，以降低这些NUISALICES。最终，这些预测工具和噪声控制技术将在系统级别应用，以减少低速和高速升降器设备和起落架的噪声。他们将集成在设计过程中，以确保满足这些产品的噪声规格和新的环境法规。机翼和虚张声势的身体噪声源可以分为两个主要主题：自噪声和相互作用噪声，这将产生音调和宽带贡献。在这两种情况下，都进行了详细的可压缩数值模拟，以预测噪声源，并准确地进行近场声音，并使用声学类比来传播这种声音到远场。将所得的结果与在开放式动态风隧道中进行的测量结果进行了比较，以验证改进的声学分析模型。