Current engine noise and reduction technology

Nesbitt, Eric

doi:10.1007/s13272-019-00381-6

Cited by 21 publications

(7 citation statements)

References 12 publications

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“…By installing a large fan driven by a low pressure turbine, turbofan engine is invited based on the turbojet engine. This engine is conceded as the most popular variation of the basic gas-turbine engine that widely applied for most airlines [6,7]. The structure of a turbofan engine is shown as figure 5.…”

Section: Turbofan Enginementioning

confidence: 99%

Current Status of Jet Engines and Their Future on Fuel Efficiency

He¹

2023

HSET

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Recently, regulations on emissions for international aviation has become increasingly strict. In addition, cost of fossil fuel has increased owing to limited non-renewable resource. Therefore, it is important to understand fuel efficiency because this is a practical method to reduce the cost and emissions based on recent technology. In this article, theoretical background of jet engines will be demonstrated, which include structure of jet engines and cycle efficiency. Followed by factors that affect the efficiency of jet engines. Finally, applications of jet engines based on efficiency and methods that improve efficiency are demonstrated, which includes recent technologies and possible future directions.

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Section: Turbofan Enginementioning

confidence: 99%

Current Status of Jet Engines and Their Future on Fuel Efficiency

He¹

2023

HSET

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“…The chapter on engine noise is comprised of three contributions, i.e., Refs. [6][7][8], that are briefly summarized here.…”

Section: Chapter 2: Engine Noisementioning

confidence: 99%

“…Ref. [6] reviews current state of the art of turbofan engine noise and engine noise reduction technology, specifically focusing on the engine technology of larger passenger jetliners which have entered into service in the 2007 through 2017 timeframe. Important factors in turbofan engine design from a community noise perspective, and the sources of noise along with their relative importance are also presented.…”

Section: Current Engine Noise and Reduction Technology-by E Nesbittmentioning

confidence: 99%

Aircraft noise generation and assessment: executive summary

Bertsch¹,

Snellen

Enghardt³

et al. 2019

CEAS Aeronaut J

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Based on the outcome of a workshop on aviation noise, this special issue on aircraft noise generation and assessment has been assembled. Invited contributions on preselected topics have been combined into one overall story line about both the aircraft noise generation and its assessment to provide an overview on the state-of-the-art capabilities in this research field (accounting both for modelling and measuring efforts). Although most relevant topics are covered, the editors do not claim that the collection of contributions is exhaustive for the multidisciplinary and vast research area dealing with aircraft noise. This issue is not restricted to current aircraft technology only, but includes low-noise technologies and novel aircraft design for subsonic and supersonic vehicles. Furthermore, an overview on measurement techniques, aeroacoustic windtunnel design, and low-noise modifications to existing windtunnels is provided. The selected paper contributions are all peer reviewed and display the status quo of experimental and numerical research activities in academia, at research institutes, and in industry.

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“…For these reasons, many industries and research centers are making a great effort to develop new low-noise technologies to improve the sustainability of the current-adopted ones. Thus, to guarantee the sustainability of the aviation described in [2], the need to develop breakthrough concepts able to reduce both noise emissions and fuel consumption [3] has become unquestionable. In this framework, a lot of disruptive design solutions have been proposed like, for instance, Distributed-Propulsion layouts [4] based on the integration of the propulsive system with the aircraft airframe, with the possibility to exploit Boundary-Layer-Ingestion (BLI) technologies [5].…”

Section: Introductionmentioning

confidence: 99%

Prediction of aeroacoustics of deformable bodies with solid or porous surface through a boundary integral formulation

De Rubeis

2023

Materials Research Proceedings

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Abstract. Novel boundary integral formulations suitable for the radiation of acoustic pressure from deformable, solid or porous, surfaces in arbitrary motion are theoretically/numerically developed. These will first be applied to a translating wing subject to unsteady bending and torsion. The influence of surface deformation on the evaluated perturbation fields will be assessed for different amplitude and frequency values of the bending and torsion modes. Subsequently, pressure will be radiated from a deformable porous sphere to validate the formulations for this type of surface.

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Current engine noise and reduction technology

Cited by 21 publications

References 12 publications

Current Status of Jet Engines and Their Future on Fuel Efficiency

Current Status of Jet Engines and Their Future on Fuel Efficiency

Aircraft noise generation and assessment: executive summary

Prediction of aeroacoustics of deformable bodies with solid or porous surface through a boundary integral formulation

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