| Near-ultrasound, broadband noise generated by low-speed airflow over wires. | |
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MedLine Citation:
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PMID: 20330189 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Vortex shedding due to flow past a cylindrical object and its accompanying sound are well-described phenomena, though research has often focused on the sound broadcast in directions transverse to the wire and downstream in high-speed flows. Here, we investigate the sound broadcast in angles nearly opposite the direction of low-speed flows from nozzles of diameter similar to those of various wires. Also investigated are the effects that several parameters (tension, wire diameter, nozzle-wire separation, etc.) have on the level and frequency content of the recorded sound. It is found that a microphone approximately 3 cm above the outlet of a nozzle records broadband, near-ultrasound noise due to the flow over the wire. Signal levels as high as 20 dB above the nozzle background are observed. Recorded broadband noise spectra associated with vortex shedding from various wires and schlieren images of the interaction between the flow and the wire will be presented. |
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Authors:
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W C Kirkpatrick Alberts; Kevin J Sanchez; Mark A Coleman; Josh Gabrielse; David A Ligon |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 127 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-03-24 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
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Languages: eng Pagination: 1781 Citation Subset: IM |
Affiliation:
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US Army Res. Lab., ATTN: RDRL-CIE-S, 2800 Powder Mill Rd., Adelphi, MD 20783. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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