JINA: Jet Installation Noise Abatement

JINA：喷射装置噪音消除

• 批准号: EP/S000917/1
• 负责人: Mahdi Azarpeyvand
• 金额: $ 75.29万
• 依托单位: University of Bristol
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FS000917%2F1
• 关键词: JINA; Jet; Installation; Noise; Abatement

Aircraft noise is known to be responsible for many physiological and psychological effects. According to the recent studies, aircraft noise not only creates a nuisance by affecting amenity, quality of life, productivity, and learning, but it also increases the risk of hospital admissions and mortality due to strokes, coronary heart disease, and cardiovascular disease. The World Health Organization estimated in 2011 that up to 1.6 million healthy life years are lost annually in the western European countries because of exposure to high levels of noise. The noise is also acknowledged by governments and airport operators as a limit to both airline fleet growth and their operations, with direct consequences to the UK economy. Based on the EUROCONTROL forecasts, the air traffic in Europe is expected to continue its long-term growth trend and the number of flights will increase by up to 2.2 times from 2010 to 2030, with the potential increase in related environmental nuisances, particularly noise. As a result, ever more stringent environmental regulations are now in place to reduce the impact of aircraft noise. It is, therefore, of great importance for major aviation industries, such as Airbus and Embraer, to better understand the aerodynamic noise generation mechanisms and develop more robust and effective methods to reduce the noise at source. While the introduction of high bypass ratio turbofans led to significant improvement of the aerodynamic performance of jet engines, it also brought about an aeroacoustical challenge, known as the "jet installation effect", due to the interaction of the jet hydrodynamic field with the high lift device components. The interaction of the jet linear or non-linear hydrodynamic field with the high-lift device components results in a significant increase of noise at low frequencies and also the potential emergence of some aharmonic tones. While a number of very recent studies have provided some insights into the physics of the low-frequency noise amplification in the case of simple circular jets, our current understanding of the interplay between the jet hydrodynamic field, the flow instabilities and the trapped acoustic modes, particularly for non-conventional jets, which generates noise, remains very limited. Our approach in JINA is to reduce the low-frequency noise amplification by the manipulation of the jet hydrodynamic field via nozzle shape optimization. The JINA campaign will bring together expertise in experimental and computational aeroacoustics and design optimization, alongside a strong international advisory and industrial board, aiming at the development of fundamental understanding of jet installation noise, leading to design and manufacture of next-generation quiet jet engines.

众所周知，飞机噪音会造成许多生理和心理影响。根据最近的研究，飞机噪音不仅会影响舒适度、生活质量、生产力和学习，造成滋扰，还会增加因中风、冠心病和心血管疾病而入院和死亡的风险。世界卫生组织 2011 年估计，西欧国家每年因暴露于高强度噪音而损失多达 160 万健康生命年。政府和机场运营商也承认噪音限制了航空公司机队的增长及其运营，对英国经济产生直接影响。根据EUROCONTROL的预测，2010年至2030年，欧洲的空中交通量预计将继续其长期增长趋势，航班数量将增加高达2.2倍，相关环境公害，特别是噪音可能会增加。因此，现在出台了更加严格的环境法规，以减少飞机噪音的影响。因此，对于空客和巴西航空工业公司等主要航空工业来说，更好地了解气动噪声的产生机制并开发更稳健和有效的方法从源头上降低噪声具有重要意义。高涵道比涡扇发动机的引入虽然使喷气发动机气动性能显着提升，但由于喷气流体动力场与高升力的相互作用，也带来了气动声学挑战，即“喷气安装效应”设备组件。射流线性或非线性流体动力场与高升力装置部件的相互作用导致低频噪声显着增加，并且还可能出现一些不和谐音调。虽然最近的一些研究对简单圆形射流情况下低频噪声放大的物理原理提供了一些见解，但我们目前对射流流体动力场、流动不稳定性和捕获声模式之间相互作用的理解，特别是对于产生噪音的非常规喷气机来说，仍然非常有限。我们在 JINA 中的方法是通过喷嘴形状优化来操纵射流流体动力场，从而减少低频噪声放大。 JINA 活动将汇集实验和计算气动声学以及设计优化方面的专业知识，以及强大的国际咨询和工业委员会，旨在发展对喷气机安装噪声的基本了解，从而设计和制造下一代安静喷气发动机。

项目成果

Aeroacoustic analysis of slat tones

板条音的气动声学分析

• DOI: http://dx.10.3397/in-2021-3202
• 发表时间: 2021
• 期刊: INTER-NOISE and NOISE-CON Congress and Conference Proceedings
• 作者: Kamliya Jawahar H

Numerical Investigation of High-lift Airfoil Fitted with Slat Cove Filler

装有板条湾填料的高升力翼型的数值研究

• DOI: http://dx.10.2514/6.2019-2439
• 发表时间: 2019
• 作者: Kamliya Jawahar H

Intermittent and stochastic characteristics of slat tones

板条音的间歇性和随机性特征

• DOI: http://dx.10.1063/5.0033827
• 发表时间: 2021
• 期刊: Physics of Fluids
• 影响因子: 4.6
• 作者: Kamliya Jawahar H

Jet noise sources for chevron nozzles in under-expanded condition

未充分膨胀条件下 V 形喷嘴的射流噪声源

• DOI: http://dx.10.1177/1475472x221101766
• 发表时间: 2022
• 期刊: International Journal of Aeroacoustics
• 影响因子: 1
• 作者: Jawahar H

Unsteady Characteristics of Mode Oscillation for\\ Screeching Jets

刺耳射流模态振荡的非定常特性

• DOI: http://dx.10.2514/6.2021-2279
• 发表时间: 2021
• 作者: Kamliya Jawahar H