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FULL-SCALE TESTS ON APU NOISE REDUCTION

Knobloch, K. and Fischer, A. and Bake, F. and Enghardt, L. and Busse-Gerstengarbe, St. (2014) FULL-SCALE TESTS ON APU NOISE REDUCTION. In: Proceedings of ASME Turbo Expo 2014: Turbine Technical Conference and Exposition, GT2014-26803. ASME Turbo Expo 2014: Turbine Technical Conference and Exposition, 16.-20. Juni 2014, Düsseldorf.

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Abstract

The present paper describes an experimental investigation of the noise emission of a full-scale Garrett (Honeywell) GTCP 36-300 APU as installed on commercial airplanes like the Airbus A320. The APU exhaust noise emissions are measured in a well-controlled environment by 25 ground-based microphones arranged in a polar arc. Comparing a hard-wall reference case with different exhaust mufflers, special attention is given to the assessment of the noise reduction obtained. The performance of a newly designed muffler is compared to the standard device for the most relevant operating states ECS (environmental control system) and MES (main engine start). The paper concludes with a short examination of possibilities to improve the overall noise reduction.

Item URL in elib:https://elib.dlr.de/89771/
Document Type:Conference or Workshop Item (Speech)
Title:FULL-SCALE TESTS ON APU NOISE REDUCTION
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Knobloch, K.karsten.knobloch (at) dlr.deUNSPECIFIED
Fischer, A.UNSPECIFIEDUNSPECIFIED
Bake, F.UNSPECIFIEDUNSPECIFIED
Enghardt, L.UNSPECIFIEDUNSPECIFIED
Busse-Gerstengarbe, St.Institut für Strömungsmechanik und Technische Akustik, Technische Universität BerlinUNSPECIFIED
Date:June 2014
Journal or Publication Title:Proceedings of ASME Turbo Expo 2014: Turbine Technical Conference and Exposition
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:GT2014-26803
Status:Published
Keywords:Noise reduction, Noise measurement, APU, Muffler design
Event Title:ASME Turbo Expo 2014: Turbine Technical Conference and Exposition
Event Location:Düsseldorf
Event Type:international Conference
Event Dates:16.-20. Juni 2014
Organizer:ASME
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Combusion Chamber Technologies (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic
Deposited By: Knobloch, Dr. Karsten
Deposited On:04 Aug 2014 09:06
Last Modified:04 Aug 2014 09:06

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