Noise from tip vortex and bubble cavitation / Neil C. Sponagle ; approved by L.J. Leggat. : D68-21/26-1990E-PDF
"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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| Ministère/Organisme | Defence Research Establishment Atlantic, issuing body. |
|---|---|
| Titre | Noise from tip vortex and bubble cavitation / Neil C. Sponagle ; approved by L.J. Leggat. |
| Titre de la série | Technical memorandum ; 90/202 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | Digitized edition from print [produced by Defence Research and Development Canada]. Includes bibliographical references (page 33). Includes abstracts in English and French. |
| Information sur la publication | Dartmouth, Nova Scotia : National Defence, Research and Development Branch, Defence Research Establishment Atlantic, March 1990. |
| Auteur / Contributeur | Sponagle, Neil Charles, 1955- author. |
| Description | 1 online resource (iv, 36 pages) : illustrations, graphs. |
| Numéro de catalogue |
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| Descripteurs | Propellers -- Cavitation. Propellers -- Noise. Cavitation noise. Hélices -- Cavitation. Hélices -- Bruit. Bruit de cavitation. |
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