<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> <title>UTas ePrints - Experimental review of devices to artificially thicken wind tunnel boundary layers</title> <script type="text/javascript" src="http://eprints.utas.edu.au/javascript/auto.js"><!-- padder --></script> <style type="text/css" media="screen">@import url(http://eprints.utas.edu.au/style/auto.css);</style> <style type="text/css" media="print">@import url(http://eprints.utas.edu.au/style/print.css);</style> <link rel="icon" href="/images/eprints/favicon.ico" type="image/x-icon" /> <link rel="shortcut icon" href="/images/eprints/favicon.ico" type="image/x-icon" /> <link rel="Top" href="http://eprints.utas.edu.au/" /> <link rel="Search" href="http://eprints.utas.edu.au/cgi/search" /> <meta content="Sargison, Jane E." name="eprints.creators_name" /> <meta content="Walker, Greg J." name="eprints.creators_name" /> <meta content="Bond, V." name="eprints.creators_name" /> <meta content="Chevalier, G." name="eprints.creators_name" /> <meta content="Jane.Sargison@utas.edu.au" name="eprints.creators_id" /> <meta content="Greg.Walker@utas.edu.au" name="eprints.creators_id" /> <meta content="" name="eprints.creators_id" /> <meta content="" name="eprints.creators_id" /> <meta content="conference_item" name="eprints.type" /> <meta content="2007-10-23 23:28:11" name="eprints.datestamp" /> <meta content="2008-01-08 15:30:00" name="eprints.lastmod" /> <meta content="show" name="eprints.metadata_visibility" /> <meta content="Experimental review of devices to artificially thicken wind tunnel boundary layers" name="eprints.title" /> <meta content="pub" name="eprints.ispublished" /> <meta content="291202" name="eprints.subjects" /> <meta content="290201" name="eprints.subjects" /> <meta content="public" name="eprints.full_text_status" /> <meta content="paper" name="eprints.pres_type" /> <meta content="Three devices that artificially increase the thickness of the boundary layer in a wind tunnel working section have been tested. These included a serrated fence to disturb the flow, and the use of various secondary jet arrays injected into the boundary layer through the bounding surface. Momentum and turbulence profiles in the boundary layer downstream from the thickening devices were measured. The greatest boundary layer thickness was achieved using an array of varying diameter crossflow jets with the jet diameter reducing with distance downstream.However, the fence thickener and a plate with varying jets increasing in diameter downstream produce a boundary layer with momentum and turbulence profiles more typical of a natural equilibrium boundary layer." name="eprints.abstract" /> <meta content="2004-12" name="eprints.date" /> <meta content="published" name="eprints.date_type" /> <meta content="4" name="eprints.pages" /> <meta content="Fifteenth Australasian Fluid Mechanics Conference" name="eprints.event_title" /> <meta content="Sydney" name="eprints.event_location" /> <meta content="13 - 17 December 2004" name="eprints.event_dates" /> <meta content="conference" name="eprints.event_type" /> <meta content="TRUE" name="eprints.refereed" /> <meta content="http://www.aeromech.usyd.edu.au/15afmc/" name="eprints.official_url" /> <meta content="Roberts, J.L., The influence of hull boundary layers on waterjet intake performance, PhD thesis, University of Tasmania, 1998. Roberts, J.L. and Walker, G.J., Artificial thickening of wind tunnel boundary layers via an array of cross-flow jets, Experimental Thermal and Fluid Science, 27, 2003, 583- 588. Patel, V.C., Calibration of the Preston tube and limitations on its use in pressure gradients., Journal of Fluid Mechanics, 23, 1965, 185-208. Schlichting, H., 1979, “Boundary-Layer Theory”, Seventh Edition, McGraw-Hill Book Company, New York. Klebanoff, P.S., Characteristics of turbulence in a boundary layer with zero pressure gradient, NACA Rep. No. 1247, 1955. Standen, N.M., A spire array for generating thick turbulent shear layers for natural wind simulation in wind tunnels, LTR-LA-94, National Aeronautical Establishment, NRC Canada, May 1972." name="eprints.referencetext" /> <meta content="Sargison, Jane E. and Walker, Greg J. and Bond, V. and Chevalier, G. (2004) Experimental review of devices to artificially thicken wind tunnel boundary layers. In: Fifteenth Australasian Fluid Mechanics Conference, 13 - 17 December 2004, Sydney." name="eprints.citation" /> <meta content="http://eprints.utas.edu.au/2307/1/Sargison00091.pdf" name="eprints.document_url" /> <link rel="schema.DC" href="http://purl.org/DC/elements/1.0/" /> <meta content="Experimental review of devices to artificially thicken wind tunnel boundary layers" name="DC.title" /> <meta content="Sargison, Jane E." name="DC.creator" /> <meta content="Walker, Greg J." name="DC.creator" /> <meta content="Bond, V." name="DC.creator" /> <meta content="Chevalier, G." name="DC.creator" /> <meta content="291202 Ship and Platform Hydrodynamics" name="DC.subject" /> <meta content="290201 Aerodynamics" name="DC.subject" /> <meta content="Three devices that artificially increase the thickness of the boundary layer in a wind tunnel working section have been tested. These included a serrated fence to disturb the flow, and the use of various secondary jet arrays injected into the boundary layer through the bounding surface. Momentum and turbulence profiles in the boundary layer downstream from the thickening devices were measured. The greatest boundary layer thickness was achieved using an array of varying diameter crossflow jets with the jet diameter reducing with distance downstream.However, the fence thickener and a plate with varying jets increasing in diameter downstream produce a boundary layer with momentum and turbulence profiles more typical of a natural equilibrium boundary layer." name="DC.description" /> <meta content="2004-12" name="DC.date" /> <meta content="Conference or Workshop Item" name="DC.type" /> <meta content="PeerReviewed" name="DC.type" /> <meta content="application/pdf" name="DC.format" /> <meta content="http://eprints.utas.edu.au/2307/1/Sargison00091.pdf" name="DC.identifier" /> <meta content="http://www.aeromech.usyd.edu.au/15afmc/" name="DC.relation" /> <meta content="Sargison, Jane E. and Walker, Greg J. and Bond, V. and Chevalier, G. (2004) Experimental review of devices to artificially thicken wind tunnel boundary layers. 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style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Sargison, Jane E.</span> and <span class="person_name">Walker, Greg J.</span> and <span class="person_name">Bond, V.</span> and <span class="person_name">Chevalier, G.</span> (2004) <xhtml:em>Experimental review of devices to artificially thicken wind tunnel boundary layers.</xhtml:em> In: Fifteenth Australasian Fluid Mechanics Conference, 13 - 17 December 2004, Sydney.</p><p style="margin-bottom: 1em" class="not_ep_block"></p><table style="margin-bottom: 1em" class="not_ep_block"><tr><td valign="top" style="text-align:center"><a onmouseover="EPJS_ShowPreview( event, 'doc_preview_2957' );" href="http://eprints.utas.edu.au/2307/1/Sargison00091.pdf" onmouseout="EPJS_HidePreview( event, 'doc_preview_2957' );"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" class="ep_doc_icon" border="0" /></a><div class="ep_preview" id="doc_preview_2957"><table><tr><td><img alt="" src="http://eprints.utas.edu.au/2307/thumbnails/1/preview.png" class="ep_preview_image" border="0" /><div class="ep_preview_title">Preview</div></td></tr></table></div></td><td valign="top"><a href="http://eprints.utas.edu.au/2307/1/Sargison00091.pdf"><span class="ep_document_citation">PDF</span></a> - Requires a PDF viewer<br />381Kb</td></tr></table><p style="margin-bottom: 1em" class="not_ep_block">Official URL: <a href="http://www.aeromech.usyd.edu.au/15afmc/">http://www.aeromech.usyd.edu.au/15afmc/</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Three devices that artificially increase the thickness of the boundary layer in a wind tunnel working section have been tested. These included a serrated fence to disturb the flow, and the use of various secondary jet arrays injected into the boundary layer through the bounding surface. Momentum and turbulence profiles in the boundary layer downstream from the thickening devices were measured. The greatest boundary layer thickness was achieved using an array of varying diameter crossflow jets with the jet diameter reducing with distance downstream.However, the fence thickener and a plate with varying jets increasing in diameter downstream produce a boundary layer with momentum and turbulence profiles more typical of a natural equilibrium boundary layer.</p></div><table style="margin-bottom: 1em" cellpadding="3" class="not_ep_block" border="0"><tr><th valign="top" class="ep_row">Item Type:</th><td valign="top" class="ep_row">Conference or Workshop Item (Paper)</td></tr><tr><th valign="top" class="ep_row">Subjects:</th><td valign="top" class="ep_row"><a href="http://eprints.utas.edu.au/view/subjects/291202.html">290000 Engineering and Technology > 291200 Maritime Engineering > 291202 Ship and Platform Hydrodynamics</a><br /><a href="http://eprints.utas.edu.au/view/subjects/290201.html">290000 Engineering and Technology > 290200 Aerospace Engineering > 290201 Aerodynamics</a></td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">2307</td></tr><tr><th valign="top" class="ep_row">Deposited By:</th><td valign="top" class="ep_row"><span class="ep_name_citation"><span class="person_name">Dr Jane Sargison</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">24 Oct 2007 10:28</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">09 Jan 2008 02:30</td></tr><tr><th valign="top" class="ep_row">ePrint Statistics:</th><td valign="top" class="ep_row"><a target="ePrintStats" href="/es/index.php?action=show_detail_eprint;id=2307;">View statistics for this ePrint</a></td></tr></table><p align="right">Repository Staff Only: <a href="http://eprints.utas.edu.au/cgi/users/home?screen=EPrint::View&eprintid=2307">item control page</a></p> </td></tr></table> </div> <!-- InstanceEndEditable --></td> </tr> <tr> <td><!-- #BeginLibraryItem "/Library/footer_eprints.lbi" --> <table width="795" border="0" align="left" cellpadding="0" class="footer"> <tr valign="top"> <td colspan="2"><div align="center"><a href="http://www.utas.edu.au">UTAS home</a> | <a href="http://www.utas.edu.au/library/">Library home</a> | <a href="/">ePrints home</a> | <a href="/contact.html">contact</a> | <a href="/information.html">about</a> | <a href="/view/">browse</a> | <a href="/perl/search/simple">search</a> | <a href="/perl/register">register</a> | <a href="/perl/users/home">user area</a> | <a href="/help/">help</a></div><br /></td> </tr> <tr><td colspan="2"><p><img src="/images/eprints/footerline.gif" width="100%" height="4" /></p></td></tr> <tr valign="top"> <td width="68%" class="footer">Authorised by the University Librarian<br /> © University of Tasmania ABN 30 764 374 782<br /> <a href="http://www.utas.edu.au/cricos/">CRICOS Provider Code 00586B</a> | <a href="http://www.utas.edu.au/copyright/copyright_disclaimers.html">Copyright & Disclaimers</a> | <a href="http://www.utas.edu.au/accessibility/index.html">Accessibility</a> | <a href="http://eprints.utas.edu.au/feedback/">Site Feedback</a> </td> <td width="32%"><div align="right"> <p align="right" class="NoPrint"><a href="http://www.utas.edu.au/"><img src="http://www.utas.edu.au/shared/logos/unioftasstrip.gif" alt="University of Tasmania Home Page" width="260" height="16" border="0" align="right" /></a></p> <p align="right" class="NoPrint"><a href="http://www.utas.edu.au/"><br /> </a></p> </div></td> </tr> <tr valign="top"> <td><p> </p></td> <td><div align="right"><span class="NoPrint"><a href="http://www.eprints.org/software/"><img src="/images/eprintslogo.gif" alt="ePrints logo" width="77" height="29" border="0" align="bottom" /></a></span></div></td> </tr> </table> <!-- #EndLibraryItem --> <div align="center"></div></td> </tr> </table> </body> </html>