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| 02410nam 2200397zi 4500 |
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| 001 | 9.943037 |
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| 003 | CaOODSP |
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| 005 | 20240919151029 |
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| 006 | m o d f |
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| 007 | cr bn||||||||| |
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| 008 | 240909e199003##nscad ob f000 0 eng d |
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| 040 | |aCaOODSP|beng|erda|cCaOODSP |
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| 041 | 0 |aeng|beng|bfre |
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| 086 | 1 |aD68-21/26-1990E-PDF |
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| 100 | 1 |aSponagle, Neil Charles, |d1955- |eauthor. |
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| 245 | 10|aNoise from tip vortex and bubble cavitation / |cNeil C. Sponagle ; approved by L.J. Leggat. |
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| 264 | 1|aDartmouth, Nova Scotia : |bNational Defence, Research and Development Branch, Defence Research Establishment Atlantic, |cMarch 1990. |
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| 300 | |a1 online resource (iv, 36 pages) : |billustrations, graphs. |
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| 336 | |atext|btxt|2rdacontent |
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| 337 | |acomputer|bc|2rdamedia |
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| 338 | |aonline resource|bcr|2rdacarrier |
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| 490 | 1 |aTechnical memorandum ; |v90/202 |
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| 500 | |aDigitized edition from print [produced by Defence Research and Development Canada]. |
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| 504 | |aIncludes bibliographical references (page 33). |
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| 520 | 3 |a"This paper presents results from experiments designed to study the sound from different types of propeller cavitation. The propellers used in the tests produced tip vortex and travelling bubble cavitation. The spectral content, directivity, and waveform of the far-field sound were measured, in essentially free-field conditions, up to 100 kHz. These data were then correlated with information about the cavity dynamics, obtained from visual observations. Vibrational modes on the tip vortex cavities produced sound at characteristic frequencies. Bubble cavitation by itself produced very broadband noise, and strongly affected the vortex cavitation noise mechanisms if the free bubbles entered the tip vortices. The noise from both kinds of cavitation was directional"--Abstract, page ii. |
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| 546 | |aIncludes abstracts in English and French. |
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| 650 | 0|aPropellers|xCavitation. |
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| 650 | 0|aPropellers|xNoise. |
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| 650 | 0|aCavitation noise. |
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| 650 | 6|aHélices|xCavitation. |
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| 650 | 6|aHélices|xBruit. |
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| 650 | 6|aBruit de cavitation. |
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| 710 | 2 |aDefence Research Establishment Atlantic, |eissuing body. |
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| 830 | #0|aD.R.E.A. technical memorandum ;|v90/202.|w(CaOODSP)9.941838 |
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| 856 | 40|qPDF|s1.37 MB|uhttps://publications.gc.ca/collections/collection_2024/rddc-drdc/D68-21-26-1990-eng.pdf |
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