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.

航空航天业在加拿大经济中发挥着非常重要的作用，在创新方面处于领先地位，其研发投资是加拿大制造业平均水平的7倍。在航空领域，飞机噪音排放及其对社区的影响仍然是行业发展的重要问题和风险。航空专家和监管机构认识到，要实现 2025 年至 2030 年预期的空中交通增长，就需要大幅减少飞机噪音排放。对于中小型商用飞机，例如庞巴迪制造的飞机，机身噪声的主要来源是起落架和高升力装置（例如缝翼和襟翼）。该项目的重点是机翼襟翼系统产生的噪音。要解决的关键挑战之一是更好地了解襟翼系统产生的噪声排放的性质以及如何减轻不同的噪声源。机身部件产生的噪声是一个复杂的现象，涉及流体力学、空气动力学、声学以及三个学科之间的相互作用。虽然计算气动声学 (CAA) 可以提供一些见解，但气动声学领域仍然严重依赖风洞实验和飞行测试来对现象进行基本理解并验证 CAA 模拟。该项目将主要包括风洞测试，并由工业合作伙伴庞巴迪提供 CAA 模拟支持。通过这种方式，该项目的另一个重要贡献将是改进和验证新飞机设计中使用的 CAA 工具。实验将考虑襟翼系统中可能导致不同噪声产生机制的许多元件，包括襟翼边缘和襟翼轨道致动器。对于没有和有后掠的机翼模型将考虑这一点。研究结果将有助于更好地了解噪声排放的物理机制、CAA 验证的详细实验数据库以及改进未来飞机设计的最佳实践建议。