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Analysis of landing gear noise during approach

Merino-Martinez, Roberto and Bertsch, Lothar and Simons, Dick and Snellen, Mirjam (2016) Analysis of landing gear noise during approach. 22nd AIAA/CEAS Aeroacoustics Conference, 01. Juni 2016, Lyon, France. DOI: 10.2514/6.2016-2769

Full text not available from this repository.

Official URL: https://arc.aiaa.org/doi/abs/10.2514/6.2016-2769

Abstract

Airframe noise is becoming increasingly important during approach, even reaching higher noise levels than the engines in some cases. More people are affected due to low flight altitudes and fixed traffic routing associated with typical approaches. Formost air- craft types, the landing gear system is a dominant airframe noise source. However, this element can only be modeled in an approximate manner in wind tunnel experiments. In this research, flyovers of landing aircraft were recorded using a 32 microphone array. Fun ctional beamforming was applied to analyze the noise emissions from the landing gear system. lt was confirmed that for some aircraft types, such as the Airbus A320 and the Fokker 70, the nose landing gear is a dominant noise source du ring approach. The correlation between the noise levels generated by the landing gear and the aircraft velocity was found to be significant, explai ning about 70% of the varia bility found in the noise levels, which is in good agreement with all known theory. Moreover, the experimental resu lts for the Airbus A320 measurements were compared with those obtained using the DLR system noise prediction tool PANAM. Whereas the total aircraft noise levels were in good agreement. the measurements indicate a higher contribution from the nose landing gear noise compared to the predictions.

Item URL in elib:https://elib.dlr.de/113447/
Document Type:Conference or Workshop Item (Speech)
Additional Information:https://arc.aiaa.org/
Title:Analysis of landing gear noise during approach
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Merino-Martinez, RobertoTU DelftUNSPECIFIED
Bertsch, LotharLothar.Bertsch (at) dlr.dehttps://orcid.org/0000-0003-2780-2858
Simons, Dickd.g.simons (at) tu-delft.nlUNSPECIFIED
Snellen, Mirjamm.snellen (at) tu-delft.nlUNSPECIFIED
Date:2016
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.2514/6.2016-2769
Status:Published
Keywords:Aircraft noise prediction, array measurements, landing gear noise
Event Title:22nd AIAA/CEAS Aeroacoustics Conference
Event Location:Lyon, France
Event Type:international Conference
Event Dates:01. Juni 2016
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
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, GO
Deposited By: Bachmann, Barbara
Deposited On:15 Sep 2017 12:39
Last Modified:06 Dec 2017 15:04

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