Identification, characterisation and reduction of noise sources from flaps and their components

襟翼及其部件噪声源的识别、表征和减少

• 批准号: 536633-2018
• 负责人: Lavoie, Philippe
• 金额: $ 5.2万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=720190
• 关键词: Identification; characterisation; reduction; noise; sources

The aerospace sector plays a very important role in the Canadian economy and leads in innovation with 7 times the Canadian manufacturing sector average in R&D investment. In aviation, aircraft noise emission and how it affects communities remain an important concern and risk for growth of the industry. Aviation experts and regulators recognize that enabling the growth in air traffic anticipated by 2025-2030 will require drastic reductions in aircraft noise emissions. For small to mid size commercial aircraft, such as the ones manufactured by Bombardier, the dominant sources of airframe noise are the landing gears and high-lift devices (e.g., slats and flaps). The focus of this project is on the noise produced from the flap system of the wing. One of the key challenges to be addressed is to gain a better understanding of the nature of the noise emission due to the flap system and how the different sources of noise can be mitigated. Noise generation from airframe components is a complex phenomena that involves fluid mechanics, aerodynamics, acoustic and interactions between the three disciplines. While computational aeroacoustics (CAA) can provide some insights, the field of aeroacoustics still relies heavily on wind tunnel experiments and flight tests for fundamental understanding of the phenomena and validation of CAA simulations. This project will consist primarily of wind tunnel tests, supported by CAA simulations by the industrial partner Bombardier. In this manner, an additional important contribution from the project will be to enable improvements and validation of the CAA tools used in the design of new aircraft. The experiments will consider a number of elements from the flap system that can lead to different noise generation mechanisms, including the flap edge and flap track actuators. This will be considered for a wing model without and with sweep. The results will lead to better fundamental understanding of the physical mechanisms responsible for noise emission, a detailed experimental database for CAA validation and improved best practice recommendation for future aircraft design.

航空航天部门在加拿大经济中起着非常重要的作用，并在创新方面以加拿大制造业平均水平投资的7倍领先。在航空中，飞机噪声排放及其如何影响社区仍然是行业增长的重要关注和风险。航空专家和监管机构认识到，在2025 - 2030年预期的空中交通增长将需要大幅降低飞机噪声排放。对于中小型商用飞机，例如庞巴迪制造的飞机，机身噪音的主要来源是起落架和高速设备（例如，板条和襟翼）。该项目的重点是机翼襟翼系统产生的噪声。要解决的主要挑战之一是更好地了解由于皮瓣系统引起的噪声排放的性质以及如何减轻噪声的不同来源。从机身组件中产生噪声是一种复杂的现象，涉及三个学科之间的流体力学，空气动力学，声学和相互作用。尽管计算空声学（CAA）可以提供一些见解，但航空声学领域仍然在很大程度上依赖风洞实验和飞行测试，以基本了解CAA模拟现象和验证。该项目将主要由风洞测试组成，并由工业合作伙伴Bombardier的CAA模拟支持。通过这种方式，该项目的另一个重要贡献将是对新飞机设计中使用的CAA工具进行改进和验证。实验将考虑瓣系统中的许多元素，这些要素可能导致不同的噪声机制，包括皮瓣边缘和瓣轨道执行器。这将被考虑在没有扫描的情况下进行机翼模型。结果将使人们对负责噪声排放的物理机制有更好的基本了解，这是一个详细的CAA验证实验数据库，并改善了未来飞机设计的最佳实践建议。