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Relationship between shock-cell length and noise of jets from rectangular and elliptic disk nozzles
, U. S.Premananda Shet
Published in Walter de Gruyter GmbH
Volume: 26
Issue: 2
Pages: 145 - 153
Jets issuing from rectangular and elliptic disk nozzles of various aspect ratios have been studied for their noise characteristics. The overall sound pressure level and directivity were measured for these jets. The effects of aspect ratio, measurement plane (major- vs. minor-) have been analyzed. The results show that the sound pressure levels are entirely different for higher and lower aspect ratio elliptic and rectangular jets. At lower aspect ratios (AR=2:1), the noise emissions from major axis plane dominate while for higher aspect ratios jets (AR>2), the noise from minor axis plane dominate. Further, the relationship between sound pressure level and average shock-cell length is observed to be quadratic at emission angles of 30° and 90° for both rectangular and elliptic jets. © Freund Publishing House Ltd.
About the journal
JournalData powered by TypesetInternational Journal of Turbo and Jet Engines
PublisherData powered by TypesetWalter de Gruyter GmbH
Open AccessNo