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

噪音污染是飞机的负面副产品。它的影响并不局限于短期的干扰；长期接触这种物质会对机场附近居民的健康造成不利影响。世界各地的商业航空管理机构一直在采取行动，制定严格的、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。机场也利用这些限制，根据飞机的噪音排放向航空公司征收着陆费。由于这些原因，航空公司倾向于购买更安静的飞机，这在飞机制造商之间造成了巨大的竞争。考虑到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降低机身噪音的创新概念。在这个项目中，申请人团队和庞巴迪公司将共同寻找两种主要机身噪声源——前起落架和机翼前缘板条——的噪音产生机制和革命性的降噪策略。这两种机身部件的设计都很少考虑到它们的声学性能，因此有很大的改进空间。合作将通过系统的实验计算方法来解决这一缺陷。实验调查将由申请人的团队在UTIAS消声风洞和水洞设施中通过声学、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公司在其计算设施中进行。通过这项研究开发的新知识和降噪概念将帮助庞巴迪继续保持其在静音飞机技术开发方面的领先地位。这将进一步加强他们在市场上的竞争力，为加拿大经济带来相关利益。这一成果还将改善机场附近居民的健康和福祉。这种合作的另一个好处是为培养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.