Drag measurements on long thin cylinders at small angles and high Reynolds numbers
Measurements of the drag caused by turbulent boundary layer mean wall shear stress on cylinders at small angles of attack and high length Reynolds numbers (8x10 super(6)
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| Veröffentlicht in: | Experiments in fluids 2005-06, Vol.38 (6), p.759-769 |
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| container_title | Experiments in fluids |
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| creator | KEITH, William L CIPOLLA, Kimberly M HART, David R FUREY, Deborah A |
| description | Measurements of the drag caused by turbulent boundary layer mean wall shear stress on cylinders at small angles of attack and high length Reynolds numbers (8x10 super(6) |
| doi_str_mv | 10.1007/s00348-005-0959-7 |
| format | Article |
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The use of a full-scale, high-speed towing tank enabled the development of turbulent boundary layers on cylinders made of stainless steel, aluminum, titanium, and polyvinyl chloride. The diameter of all cylinders in this experiment was 12.7 mm; two cylinder lengths, 3.05 m and 6.10 m, were used, corresponding to aspect ratio values L/a=480 and 960, respectively. Materials of various densities were towed at critical angles, resulting in linear cylinder geometry for tow speeds ranging from 2.6 m/s to 20.7 m/s and angles between 0 degree and 12 degree . Towing angles were measured with digital photography, and streamwise drag was measured with a strut-mounted load cell at the tow point. The measured tangential drag was very sensitive to small increases in angle at all tow speeds. A momentum thickness length scale is proposed to scale the tangential drag coefficient. The effects of the cross-flow resulting from the small angles of tow have a significant effect on the tangential drag coefficient values. A scaling for the orthogonal force on the cylinders was determined and provides a correction to published normal drag coefficient values for pure cross-flow. The presence of the axial turbulent boundary layer has a significant effect on these orthogonal forces.</description><identifier>ISSN: 0723-4864</identifier><identifier>EISSN: 1432-1114</identifier><identifier>DOI: 10.1007/s00348-005-0959-7</identifier><identifier>CODEN: EXFLDU</identifier><language>eng</language><publisher>Heidelberg: Springer</publisher><subject>Angles (geometry) ; Boundary layer and shear turbulence ; Cylinders ; Drag ; Drag coefficients ; Exact sciences and technology ; Fluid dynamics ; Fluid flow ; Fundamental areas of phenomenology (including applications) ; Instrumentation for fluid dynamics ; Physics ; Turbulent boundary layer ; Turbulent flow ; Turbulent flows, convection, and heat transfer</subject><ispartof>Experiments in fluids, 2005-06, Vol.38 (6), p.759-769</ispartof><rights>2005 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c378t-ea02451a409e4690a66d9b1330ada996dc0da58d5be4a70721607c4db32f32613</citedby><cites>FETCH-LOGICAL-c378t-ea02451a409e4690a66d9b1330ada996dc0da58d5be4a70721607c4db32f32613</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27903,27904</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=16865301$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>KEITH, William L</creatorcontrib><creatorcontrib>CIPOLLA, Kimberly M</creatorcontrib><creatorcontrib>HART, David R</creatorcontrib><creatorcontrib>FUREY, Deborah A</creatorcontrib><title>Drag measurements on long thin cylinders at small angles and high Reynolds numbers</title><title>Experiments in fluids</title><description>Measurements of the drag caused by turbulent boundary layer mean wall shear stress on cylinders at small angles of attack and high length Reynolds numbers (8x10 super(6)<Re L <6x10 super(7)) are presented. The use of a full-scale, high-speed towing tank enabled the development of turbulent boundary layers on cylinders made of stainless steel, aluminum, titanium, and polyvinyl chloride. The diameter of all cylinders in this experiment was 12.7 mm; two cylinder lengths, 3.05 m and 6.10 m, were used, corresponding to aspect ratio values L/a=480 and 960, respectively. Materials of various densities were towed at critical angles, resulting in linear cylinder geometry for tow speeds ranging from 2.6 m/s to 20.7 m/s and angles between 0 degree and 12 degree . Towing angles were measured with digital photography, and streamwise drag was measured with a strut-mounted load cell at the tow point. The measured tangential drag was very sensitive to small increases in angle at all tow speeds. A momentum thickness length scale is proposed to scale the tangential drag coefficient. The effects of the cross-flow resulting from the small angles of tow have a significant effect on the tangential drag coefficient values. A scaling for the orthogonal force on the cylinders was determined and provides a correction to published normal drag coefficient values for pure cross-flow. The presence of the axial turbulent boundary layer has a significant effect on these orthogonal forces.</description><subject>Angles (geometry)</subject><subject>Boundary layer and shear turbulence</subject><subject>Cylinders</subject><subject>Drag</subject><subject>Drag coefficients</subject><subject>Exact sciences and technology</subject><subject>Fluid dynamics</subject><subject>Fluid flow</subject><subject>Fundamental areas of phenomenology (including applications)</subject><subject>Instrumentation for fluid dynamics</subject><subject>Physics</subject><subject>Turbulent boundary layer</subject><subject>Turbulent flow</subject><subject>Turbulent flows, convection, and heat transfer</subject><issn>0723-4864</issn><issn>1432-1114</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><recordid>eNqNkE1LxDAURYMoOI7-AHfZCG6q7yVp2i7FbxgQBl2HN03aqaTpmHQW8-_tMANuXT0unHt5HMauEe4QoLhPAFKVGUCeQZVXWXHCZqikyBBRnbIZFEJmqtTqnF2k9A2AeQXljC2fIrW8d5S20fUujIkPgfshtHxcd4HXO98F62LiNPLUk_ecQuvdlIPl665d86XbhcHbxMO2X03kJTtryCd3dbxz9vXy_Pn4li0-Xt8fHxZZLYtyzByBUDmSgsopXQFpbasVSglkqaq0rcFSXtp85RQV0_-ooaiVXUnRSKFRztntYXcTh5-tS6Ppu1Q77ym4YZsMaiWE1Cj-geYopCwkiAnFA1rHIaXoGrOJXU9xZxDMXrU5qDaTarNXbYqpc3Ocp1STbyKFukt_RV3qXALKX3KEfUE</recordid><startdate>20050601</startdate><enddate>20050601</enddate><creator>KEITH, William L</creator><creator>CIPOLLA, Kimberly M</creator><creator>HART, David R</creator><creator>FUREY, Deborah A</creator><general>Springer</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QH</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope><scope>7QF</scope><scope>7TB</scope><scope>7U5</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>JG9</scope><scope>KR7</scope><scope>L7M</scope></search><sort><creationdate>20050601</creationdate><title>Drag measurements on long thin cylinders at small angles and high Reynolds numbers</title><author>KEITH, William L ; CIPOLLA, Kimberly M ; HART, David R ; FUREY, Deborah A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c378t-ea02451a409e4690a66d9b1330ada996dc0da58d5be4a70721607c4db32f32613</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>Angles (geometry)</topic><topic>Boundary layer and shear turbulence</topic><topic>Cylinders</topic><topic>Drag</topic><topic>Drag coefficients</topic><topic>Exact sciences and technology</topic><topic>Fluid dynamics</topic><topic>Fluid flow</topic><topic>Fundamental areas of phenomenology (including applications)</topic><topic>Instrumentation for fluid dynamics</topic><topic>Physics</topic><topic>Turbulent boundary layer</topic><topic>Turbulent flow</topic><topic>Turbulent flows, convection, and heat transfer</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>KEITH, William L</creatorcontrib><creatorcontrib>CIPOLLA, Kimberly M</creatorcontrib><creatorcontrib>HART, David R</creatorcontrib><creatorcontrib>FUREY, Deborah A</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Aqualine</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Aluminium Industry Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Experiments in fluids</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>KEITH, William L</au><au>CIPOLLA, Kimberly M</au><au>HART, David R</au><au>FUREY, Deborah A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Drag measurements on long thin cylinders at small angles and high Reynolds numbers</atitle><jtitle>Experiments in fluids</jtitle><date>2005-06-01</date><risdate>2005</risdate><volume>38</volume><issue>6</issue><spage>759</spage><epage>769</epage><pages>759-769</pages><issn>0723-4864</issn><eissn>1432-1114</eissn><coden>EXFLDU</coden><abstract>Measurements of the drag caused by turbulent boundary layer mean wall shear stress on cylinders at small angles of attack and high length Reynolds numbers (8x10 super(6)<Re L <6x10 super(7)) are presented. The use of a full-scale, high-speed towing tank enabled the development of turbulent boundary layers on cylinders made of stainless steel, aluminum, titanium, and polyvinyl chloride. The diameter of all cylinders in this experiment was 12.7 mm; two cylinder lengths, 3.05 m and 6.10 m, were used, corresponding to aspect ratio values L/a=480 and 960, respectively. Materials of various densities were towed at critical angles, resulting in linear cylinder geometry for tow speeds ranging from 2.6 m/s to 20.7 m/s and angles between 0 degree and 12 degree . Towing angles were measured with digital photography, and streamwise drag was measured with a strut-mounted load cell at the tow point. The measured tangential drag was very sensitive to small increases in angle at all tow speeds. A momentum thickness length scale is proposed to scale the tangential drag coefficient. The effects of the cross-flow resulting from the small angles of tow have a significant effect on the tangential drag coefficient values. A scaling for the orthogonal force on the cylinders was determined and provides a correction to published normal drag coefficient values for pure cross-flow. The presence of the axial turbulent boundary layer has a significant effect on these orthogonal forces.</abstract><cop>Heidelberg</cop><cop>Berlin</cop><pub>Springer</pub><doi>10.1007/s00348-005-0959-7</doi><tpages>11</tpages></addata></record> |
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| identifier | ISSN: 0723-4864 |
| ispartof | Experiments in fluids, 2005-06, Vol.38 (6), p.759-769 |
| issn | 0723-4864 1432-1114 |
| language | eng |
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| subjects | Angles (geometry) Boundary layer and shear turbulence Cylinders Drag Drag coefficients Exact sciences and technology Fluid dynamics Fluid flow Fundamental areas of phenomenology (including applications) Instrumentation for fluid dynamics Physics Turbulent boundary layer Turbulent flow Turbulent flows, convection, and heat transfer |
| title | Drag measurements on long thin cylinders at small angles and high Reynolds numbers |
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