B.J. Ikelheimer, R.T. Nagel

Higher order spinning modes may be synthesized over portions of a duct circumference using fewer inputs than required to synthesize the complete mode. These partial modes are adequate for use as antinoise and are capable of controlling the far field noise of a ducted blade-vane system. The regions of space where active control is effective depend upon the phase of the anti-noise speakers. The (1,0) spinning mode has been reduced by 15 dB at BPF in selectable sections of the far field using two opposing anti-noise speakers or a single anti-noise speakers.

First Joint CEAS/AIAA Aeroacoustics Conference, München, 1995

Conference Paper

englisch

21,0 x 29,7 cm, 8 Seiten

DGLR-Bericht, 1995, 1995-01, First Joint CEAS/AIAA Aeroacoustics Conference - Proceedings; S.223-230; 1995; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

aeroacoustics

Bibliothek

1995