Shielding Flap Type Jet Engine Noise Suppressor
作者:
Domenic J. Maglieri,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1959)
卷期:
Volume 31,
issue 4
页码: 420-422
ISSN:0001-4966
年代: 1959
DOI:10.1121/1.1907727
出版商: Acoustical Society of America
数据来源: AIP
摘要:
Far‐field noise measurements from model tests of a shielding flap type jet noise suppressor are presented in the form of radiation patterns and frequency spectra. The tests were conducted using a cold air jet issuing from the nozzle in such a manner as to attach to and flow along the surface of a shielding flap. Whereas other proposed noise suppressors provide generally symmetrical noise radiation patterns, the present device skews the pattern in a beneficial way such that large noise reductions are obtained in the downward direction. These large noise reductions are thought to result from both the acoustic shielding of the flap and the benefits of flow attachment.
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