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Titel:

Development of an Experimental Setup for the Investigation of Aeroacoustic Effects inside Aircraft Air-Distribution Systems

Autor(en):
S.F. Bokhari, O. von Estorff, E. Grunau, M. Stoob, W. Gleine
Zusammenfassung:
Advanced aircraft cabin noise insulation technologies have resulted in significant improvements towards quieter interiors. Against these lower background noise levels, however, the noise from the air-distribution system has become more noticeable than before and a significant contributor to the overall interior noise level. With respect to an efficient design of this system it is important to be able to investigate ist aeroacoustic behavior and mechanism by the means of a suitable experimental setup, adaptable to specific system components or component clusters. Moreover, such an experimental setup may be used to validate numerical models, which are currently under development at the Institute of Modelling and Computation. The present paper deals with an experimental setup which, in particular, incorporates the usage of a traversable Laser Doppler Anemometer. This allows non-intrusive locally resolved fluid velocity measurements, from which velocity profiles and associated turbulence energies can be derived. Special actuators, namely a variable frequency fan and throttle system, are used to produce the flow conditions close to those inside the real air-distribution system. The whole system is controlled and monitored by a special input-output (I/O) configuration and software environment (MATLAB and LabView). The measured data are processed in a parameter identification environment and evaluated with respect to the information needed for the design of the air-distribution system. Finally, results of representative measurements conducted on one of the most common parts of the air-distribution system are presented and discussed in detail.
Veranstaltung:
Deutscher Luft- und Raumfahrtkongress 2010
Medientyp:
Conference Paper
Sprache:
englisch
Format:
21,0 x 29,7 cm, 7 Seiten
Veröffentlicht:
Deutscher Luft- und Raumfahrtkongress Tagungsband - Manuskripte, 2010, 2010, ; S.405-411; 2010; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn
Preis:
NA
ISBN:
ISSN:
Kommentar:
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Stichworte zum Inhalt:
Verfügbarkeit:
Bestellbar
Veröffentlicht:
2010


Dieses Dokument ist Teil einer übergeordneten Publikation:
Deutscher Luft- und Raumfahrtkongress Tagungsband - Manuskripte, 2010