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，飞机噪声是导致许多生理和心理影响的原因。根据最近的研究，飞机噪声不仅通过影响便利性，生活质量，生产力和学习来造成滋扰，而且还增加了由于中风，冠心病和心血管疾病而引起的住院和死亡率的风险。世界卫生组织在2011年估计，由于暴露于高水平的噪音，西欧国家每年在西欧国家每年损失多达160万个健康的人生年。政府和机场运营商也承认噪音是航空公司车队增长及其运营的限制，对英国经济产生了直接的影响。根据欧洲控制的预测，预计欧洲的空中交通将继续其长期增长趋势，从2010年到2030年，航班数量将增加2.2倍，而相关的环境麻烦，尤其是噪音的可能增加。结果，现在已经制定了更严格的环境法规，以减少飞机噪声的影响。因此，对于空中客车和巴西航空工业公司等主要航空行业来说，非常重要的是，更好地了解空气动力学的噪声产生机制并开发出更强大，更有效的方法来减少源头的噪声。虽然引入高旁路比率的涡轮增压剂导致喷气发动机的空气动力性能显着改善，但由于喷气流体动力场与高升力设备组件的相互作用，它也引起了空气声挑战，称为“喷气安装效果”。射流线性或非线性流体动力场与高速移动装置组件的相互作用导致低频下噪声的显着增加，以及某些Aharmonic音调的潜在出现。虽然许多最近的研究为简单的圆形喷气机提供了一些对低频噪声扩增物理学的见解，但我们目前对射流流体动力场，流动不稳定和捕获的声学模式之间的相互作用的理解，尤其是对于非惯性射击而言，这会产生噪声，这仍然很有限。我们在Jina中的方法是通过通过喷嘴形状优化对射流流体动力场操纵来减少低频噪声扩增。 Jina运动将汇集实验和计算空气声学和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，旨在发展对喷气式安装噪声的基本了解，从而导致下一代安静的喷气发动机的设计和制造。

项目成果

Intermittent and stochastic characteristics of slat tones

板条音的间歇性和随机性特征

• DOI: 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

Aeroacoustic analysis of slat tones

板条音的气动声学分析

• DOI: 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: 10.2514/6.2019-2439
• 发表时间: 2019
• 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: 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: 10.2514/6.2021-2279
• 发表时间: 2021
• 作者: Kamliya Jawahar H