EFFECT OF NOZZLE SIZE ON SCREECH NOISE ELIMINATION FROM SWIRLING UNDEREXPANDED JETS

The objective of the study was to investigate the possibility of using a smaller nozzle for eliminating screech noise. By comparing results for nozzles of different sizes, a strategy for screech noise elimination is developed. It is shown that, by using a converging nozzle with an exit diameter of 0...

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Bibliographic Details
Published in:	Journal of sound and vibration Vol. 252; no. 1; pp. 178 - 186
Main Authors:	CHEN, R.-H., SAADANI, S.B., CHEW, L.P.
Format:	Journal Article
Language:	English
Published:	London Elsevier Ltd 18-04-2002 Elsevier
Subjects:	Acoustics Aeroacoustics and atmospheric sound Aeroacoustics, atmospheric sound Exact sciences and technology Fundamental areas of phenomenology (including applications) Physics Swirling flow Creeching (aircraft) Size effect Experimental study Aeroacoustics Underexpanded jet Noise control
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Summary:	The objective of the study was to investigate the possibility of using a smaller nozzle for eliminating screech noise. By comparing results for nozzles of different sizes, a strategy for screech noise elimination is developed. It is shown that, by using a converging nozzle with an exit diameter of 0.55 cm, instead of a 1.1-cm diameter nozzle, screech noise is eleminated when using a sufficiently high degree of swirl.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0022-460X 1095-8568
DOI:	10.1006/jsvi.2001.3927