Development and evaluation of noise measurement techniques in low- and high-speed wind tunnels

噪音会造成短期和长期的健康问题，如睡眠障碍、心血管影响、听力损伤以及工作和学习成绩下降[1,2]。飞机内部和外部的噪音都是造成这个问题的原因。此外，与许多其他环境问题相比，由于航空运输使用的全面增加，噪音污染继续增长。许多国家都制定了有关社区噪音的规定，特别是与航空运输有关的规定。拟议的研究将使低空和高速风洞中飞机噪声测量技术的发展和表征成为可能，旨在验证和减少对大量飞行试验的需求，并评估新设计的降噪结构。庞巴迪航空航天公司和MSD航空公司都将从当前项目的成果中受益。庞巴迪公司的兴趣在于尽量减少为测量噪声而进行的大量而昂贵的飞行试验的次数，并降低飞机的噪声水平。MDSAero有兴趣探索和减少发动机测试单元内产生的噪音，特别是排气系统内的噪音。卡尔顿大学有一个高速风洞，在加拿大独一无二。这个设施是这个项目的基础，提供空气流动速度达到超音速气流水平。将在风洞中评估各种结构和测量方法，并将结果与飞行试验、经验和数值预测的测量数据进行比较。该项目的结果将为庞巴迪带来经济优势，因为它减少了所需飞行测试的数量，MDS航空公司也将通过改进测试设施环境获得经济优势。采用优化的面板设计将改善受飞机噪音影响的普通民众的健康和福祉张晓明，“环境污染对人体健康的影响”，环境科学学报，2008(1):123-131,2000。[2]“环境噪音造成的疾病负担”，世界卫生组织，2011年。

Noise can cause short- and long-term health problems, such as sleep disturbance, cardiovascular effects,hearing impairment, and decreased work and school performance [1,2]. Both aircraft internal and exteriornoise contribute to this problem. Additionally, in contrast to many other environmental problems, noisepollution continues to grow, due to overall increased use of air transportation. Many countries have createdregulations on community noise, and specifically related to air transportation. The proposed research willenable the development and characterization of aircraft noise measurement technologies in low- andhigh-speed wind tunnels, aiming at validating and reducing the need for extensive flight tests, and evaluatingnewly designed structures for noise reduction. Bombardier Aerospace and MSD Aero Corporation will bothbenefit from the results of the current project. Bombardier is interested in minimizing the number of extensiveand expensive flight tests required for noise measurements, and in reducing the noise levels in aircraft. MDSAero is interested in exploring and minimizing the noise generation inside their engine test cell, and inparticular inside the exhaust system. Carleton University has a High-Speed Wind Tunnel, unique in Canada.This facility is fundamental for this project, providing air flow speeds up to supersonic airflow levels. Variousstructures and measurement methodologies will be assessed in the wind-tunnel, and results compared withmeasured data from flight tests, empirical and numerical predictions. The outcomes from this project willbring an economic advantage to Bombardier, by reducing the number of required flight tests, and MDS Aerothrough an improved testing facility environment. The adoption of the optimized panel designs will improvethe health and well-being of the general population impacted by aircraft noise.[1] W. Passchier-Vermeer and W. Passchier, "Noise Exposure and Public Health", Environmental HealthPerspectives, 108(1): 123-131, 2000.[2] "Burden of disease from environmental noise", World Health Organization, 2011.