Noise Reduction in Wing Leading-Edge Slats and Nose Landing Gear

噪音污染是飞机的一个负面副产品。其影响并不局限于短期的干扰；长期暴露在空气中会对居住在机场附近的人口产生不利的健康影响。全球各地的商业航空管理机构一直在这个问题上采取行动，设定了严格的、并不断收紧的噪音限制，以逐步淘汰商业航线上的噪音飞机设计。这些限制也被机场用来根据飞机的噪音排放向航空公司征收着陆费。出于这些原因，航空公司倾向于购买更安静的飞机，这造成了飞机制造商之间的巨大竞争。有了这些经济和企业社会责任的动机，加拿大最大的飞机制造商庞巴迪航空航天公司正在大力寻找创新的概念来降低机身噪音。在该项目中，申请者团队和庞巴迪将针对机身的两个主要噪声源：机头起落架和机翼前缘板条，寻找噪音产生机制和革命性的噪音消减策略。这两个机身部件在设计时都没有考虑到它们的声学性能，因此有很大的改进空间。该合作将通过采取系统的实验-计算方法来解决这一不足。实验调查将由申请人的团队在UTIAS无回声风洞和水洞设施通过声学、流场和力测量进行，而通过计算模拟进行的补充研究将由庞巴迪在其计算设施进行。通过这项研究开发的新知识和噪音缓解概念将有助于庞巴迪继续在静音飞机技术开发方面保持领先地位。这将进一步增强它们在市场上的竞争力，为加拿大经济带来相关好处。这一结果还将改善居住在机场附近的居民的健康和福祉。这种合作的另一个好处是为培训高素质的研究人员和工程师创造了巨大的机会。

Noise pollution is a negative by-product of aircraft. Its impact is not limited to short-term disturbance; prolonged exposure has been associated with adverse health effects on populations living near airports. Commercial aviation governing bodies around the globe have been acting on this issue by setting strict, and continually tightening, noise limits to phase out the noisy aircraft designs from commercial routes. These limits are also used by airports to impose landing fees on airlines based on their aircraft's noise emission. For these reasons, airlines are inclined towards purchasing quieter aircraft, and this creates a huge competition among aircraft manufacturers. With these economic as well as corporate social responsibility motivations, Bombardier Aerospace, Canada's largest aircraft manufacturer, is heavily searching for innovative concepts to decrease airframe noise. Partnering together in this project, the applicant's group and Bombardier will be searching for noise production mechanisms and revolutionary noise abatement strategies for two major airframe noise sources: nose landing gear and wing leading-edge slats. Both of these airframe components are designed with minimal consideration to their acoustic performance and there is, therefore, a lot of space for improvement. The collaboration will address this deficiency by undertaking a systematic experimental-computational approach. The experimental investigations will be executed by the applicant's team at the UTIAS anechoic wind and water tunnel facilities through acoustic, flow field and force measurements, while complementary research through computational simulations will be conducted by Bombardier at their computing facilities. The new knowledge and noise mitigation concepts developed through this research will assist Bombardier to continue its lead in the development of quiet aircraft technology. This will further strengthen their competitiveness in the market, bringing associated benefits to the Canadian economy. This outcome will also improve the health and wellbeing of populations living near airports. A further benefit of this collaboration is the creation of immense opportunities for the training of highly qualified researchers and engineers.