Special Issue "Aircraft Noise"

A special issue of Aerospace (ISSN 2226-4310). This special issue belongs to the section "Aeronautics".

Deadline for manuscript submissions: 31 January 2022.

Special Issue Editors

Prof. Dr. Adrian Sescu
E-Mail Website
Guest Editor
Department of Aerospace Engineering, Mississippi State University, Starkville, MS 39762, USA
Interests: receptivity and transition in boundary layers; boundary layer control; theoretical and computational aeroacoustics; turbulence in fluids
Dr. Lothar Bertsch
E-Mail Website
Guest Editor
German Aerospace Center (DLR), Institute of Aerodynamics and Flow Technology, Göttingen, Germany
Interests: aircraft noise; noise prediction; aircraft design; flight simulation; noise abatement procedures; uncertainty quantification; auralization; low-noise aircraft design; perception-influenced design

Special Issue Information

Dear Colleagues,

Noise generated by aircraft continues to be a pressing issue for society, as an increasing number of people residing in proximity to airports make noise complaints on a regular basis. The reduction of aircraft noise is therefore a very important engineering task that would require the careful identification of different acoustic sources around the airplane, the understanding of noise source behavior and ranking along flight trajectories, sophisticated measurement techniques, as well as robust and accurate numerical tools aimed at predicting the generation of noise, the propagation through the atmosphere, and the resulting noise impact along approach and departure flights. For an overall assessment of the situation, the situation has to be assessed along entire flight trajectories rather than assessing limited operating conditions only. Furthermore, it is highly recommended to apply multiple acoustic metrics and account for different and widespread observer locations along the flight. Only then can the overall situation be adequately captured. Obviously, this is a highly multidisciplinary effort and no single discipline can address this problem.

This “Aircraft noise” Special Issue targets research studies in that multidisciplinary context that deal with numerical or experimental investigation that range from investigation of specific noise sources to the assessment of noise generated  by the overall aircraft in operation.  Both basic and applied research studies involving modelling and simulations of aircraft noise will be considered for this Special Issue. Specific topics that are highly welcome are listed here:

- measurements, acoustic camera, beamforming (windtunnel, flyover)
- transition from experiment or high-fidelity simulation to flyover situation
- aircraft design
- flight procedure
- computational aeroacoustics
- fast prediction and scenarions (multiple flights)
- perception influenced design and annoyance studies
- uncertainties in simulation
- propeller, distributed propulsion and electrification
- supersonic flight
- jet noise
- turbofan noise
- sonic boom

Published Papers (1 paper)

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Research

Article
Application of Noise Certification Regulations within Conceptual Aircraft Design
Aerospace 2021, 8(8), 210; https://doi.org/10.3390/aerospace8080210 - 03 Aug 2021
Viewed by 315
Abstract
ICAO Annex 16 regulations are used to certify the acoustic performance of subsonic transport aircraft. Each aircraft is classified according to the measured EPNL levels at specific certification locations along the approach and departure. By simulating this certification process, it becomes possible to [...] Read more.
ICAO Annex 16 regulations are used to certify the acoustic performance of subsonic transport aircraft. Each aircraft is classified according to the measured EPNL levels at specific certification locations along the approach and departure. By simulating this certification process, it becomes possible to identify all relevant parameters and assess promising measures to reduce the noise certification levels in compliance with the underlying ICAO regulations, i.e., allowable operating conditions of the aircraft. Furthermore, simulation is the only way to enable an assessment of novel technology and non-existing vehicle concepts, which is the main motivation behind the presented research activities. Consequently, the ICAO Annex 16 regulations are integrated into an existing noise simulation framework at DLR, and the virtual noise certification of novel aircraft concepts is realized at the conceptual design phase. The predicted certification levels can be directly selected as design objectives in order to realize an advantageous ICAO noise category for a new aircraft design, i.e., simultaneously accounting for the design and the resulting flight performance. A detailed assessment and identification of operational limits and allowable flight procedures for each conceptual aircraft design under consideration is enabled. Sensitivity studies can be performed for the relevant input parameters that influence the predicted noise certification levels. Specific noise sources with a dominating impact on the certification noise levels can be identified, and promising additional low-noise measures can be applied within the conceptual design phase. The overall simulation process is applied to existing vehicles in order to assess the validity of the simulation resultsfcompared to published data. Thereafter, the process is applied to some DLR low-noise aircraft concepts to evaluate their noise certification levels. These results can then be compared to other standard noise metrics that are typically applied in order to describe aircraft noise, e.g., SEL isocontour areas. It can be demonstrated that certain technologies can significantly reduce the noise impact along most of an approach or departure flight track but have only a limited influence on the noise certification levels and vice versa. Finally, an outlook of the ongoing developments is provided, in order to apply the new simulation process to supersonic aircraft. Newly proposed regulations for such concepts are implemented into the process in order to evaluate these new regulations and enable direct comparison with existing regulations. Full article
(This article belongs to the Special Issue Aircraft Noise)
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