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Immission-Based Noise Reduction within Conceptual Aircraft Design

Blinstrub, Jason (2019) Immission-Based Noise Reduction within Conceptual Aircraft Design. DLR-Forschungsbericht. DLR-FB-2019-12. Dissertation. 143 S. doi: 10.34912/fl8ght_n01s3.

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The noise on the ground not only depends on the aircraft design itself, but also on the observer location and the operating conditions of the aircraft along its flightpath. Therefore, it is inevitable to consider the individual flightpaths of each aircraft concept. This allows to fully assess the noise reduction potential for the community. In order to compute individual low-noise flightpaths for different aircraft concepts, the tool Flightpaths for Noise Analyses (FlipNA) is developed and integrated into an existing noise prediction process. The application of FlipNA focuses on three existing tube-and-wing aircraft. One aircraft is conventional, whereas two aircraft feature an engine position that offers significant fan noise shielding. To also consider different engine types during departure, two other aircraft of the Collaborative Research Center 880 are assessed. Results show that noise reduction is achieved for all three aircraft when individual low-noise flightpaths are used. Along the departure flightpaths, the noise on the ground of the two new aircraft is significantly lower compared to the conventional aircraft. The assessment of different engine types along departure flightpaths shows, that the operating conditions for minimum noise significantly depends on the engine performance and its specific noise characteristics. In summary, the necessity and benefit of considering individual flightpaths and the noise source ranking within the conceptual aircraft design phase is demonstrated. Only then can the full noise reduction potential of individual aircraft be exploited.

Item URL in elib:https://elib.dlr.de/127483/
Document Type:Monograph (DLR-Forschungsbericht, Dissertation)
Title:Immission-Based Noise Reduction within Conceptual Aircraft Design
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Blinstrub, JasonUNSPECIFIEDhttps://orcid.org/0000-0003-1913-0529UNSPECIFIED
Refereed publication:Yes
Open Access:No
Number of Pages:143
Keywords:Aircraft noise, conceptual aircraft design, flight path, noise sources, FlipNA, PANAM
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation (old)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, GO
Deposited By: Carter, Beatrice
Deposited On:24 Jul 2019 11:03
Last Modified:08 Sep 2020 10:51

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