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Noise Tests on a General Aviation Aeroplane 4-stroke Piston Engine.

Dobrzynski, W. and Gehlhar, B. (1995) Noise Tests on a General Aviation Aeroplane 4-stroke Piston Engine. In: Proc. Fourth Int. Congr. on Sound and Vibration 1995. Fourth International Congress on Sound and Vibration, St. Petersburg/Russia, June 24-27, 1995.

Full text not available from this repository.

Abstract

The overall noise from propeller driven General Aviation aeroplanes is due in part to piston-engine noise. Therefore engine noise cannot be neglected when developing corresponding noise reduction measures for such aeroplanes in trying to meet future - possibly rather stringent - noise limits. An engine noise test facility was developed and initial tests were performed on a Lycoming IO-360 engine. The engine exhaust, rather than direct engine-housing vibration caused radiation, was identified as the prime source of engine noise. Spectral characteristics and radiation directivities were determined for different operational conditions as well as the dependence of the overall noise on full and part throttle engine power. The transmission loss of a typical commercially available exhaust muffler was determined to be sufficiently high (in terms of overall A-weighted levels) essentially because the test engine's noise.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1995, pages=8,
Title:Noise Tests on a General Aviation Aeroplane 4-stroke Piston Engine.
Authors:
AuthorsInstitution or Email of Authors
Dobrzynski, W.UNSPECIFIED
Gehlhar, B.UNSPECIFIED
Date:1995
Journal or Publication Title:Proc. Fourth Int. Congr. on Sound and Vibration 1995
Status:Published
Keywords:Piston-engine noise, General Aviation aircraft noise
Event Title:Fourth International Congress on Sound and Vibration, St. Petersburg/Russia, June 24-27, 1995
HGF - Research field:UNSPECIFIED
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:L TT - Triebwerkstechnologien
DLR - Research theme (Project):L - Quiet Air Traffic (old)
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Entwurfsaerodynamik
Deposited By: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:05

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