On the relationship between efficiency and wake structure of a batoid-inspired oscillating fin
A mechanical representation of batoid-like propulsion using a flexible fin with an elliptical planform shape is used to study the hydrodynamics of undulatory propulsion. The wake is found to consist of a series of interconnected vortex rings, whereby leading and trailing edge vortices of subsequent...
Gespeichert in:
Veröffentlicht in: | Journal of fluid mechanics 2012-01, Vol.691, p.245-266 |
---|---|
Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
container_end_page | 266 |
---|---|
container_issue | |
container_start_page | 245 |
container_title | Journal of fluid mechanics |
container_volume | 691 |
creator | Dewey, Peter A. Carriou, Antoine Smits, Alexander J. |
description | A mechanical representation of batoid-like propulsion using a flexible fin with an elliptical planform shape is used to study the hydrodynamics of undulatory propulsion. The wake is found to consist of a series of interconnected vortex rings, whereby leading and trailing edge vortices of subsequent cycles become entangled with one another. Efficient propulsion is achieved when leading and trailing edge vortices coalesce at the spanwise location where most of the streamwise fluid momentum is concentrated in the wake of the fin. Both the Strouhal number and the wavelength are found to have a significant effect on the wake structure. In general, a decrease in wavelength promotes a wake transition from shedding a single vortex per half-oscillation period to shedding a pair of vortices per half-oscillation period. An increase in Strouhal number causes the wake to bifurcate a finite distance downstream of the trailing edge of the fin into a pair of jets oriented at an acute angle to the line of symmetry. The bifurcation distance decreases with increasing Strouhal number and wavelength, and it is shown to obey a simple scaling law. |
doi_str_mv | 10.1017/jfm.2011.472 |
format | Article |
fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_1642217104</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><cupid>10_1017_jfm_2011_472</cupid><sourcerecordid>2557095531</sourcerecordid><originalsourceid>FETCH-LOGICAL-c397t-25b76f204303b9e9d63ee44ef7c07d5cb751958cc0482290e538b704085a81213</originalsourceid><addsrcrecordid>eNqFkU1LJDEQhsOyws6qN39AEIQ9bI9V6aTTOS6yXyB40atNOl3RjDPpMelG_PdmcFhBFjzV5annreJl7ARhiYD6fOU3SwGIS6nFJ7ZA2ZhKN1J9ZgsAISpEAV_Y15xXAFiD0Qt2exX5dE880dpOYYz5Pmx5T9MTUeTkfXCBonvmNg78yT4Qz1Oa3TQn4qPnlvd2GsNQhZi3IdHAx-zCeqeKd9yHeMQOvF1nOt7PQ3bz6-f1xZ_q8ur334sfl5WrjZ4qoXrdeAGyhro3ZIamJpKSvHagB-V6rdCo1jmQrRAGSNVtr0FCq2yLAutD9u3Vu03j40x56jYhOyqXRBrn3GEjhUCNJeFDFBAMSAVQ0NN36GqcUyyPdAalURLbtkDfXyGXxpwT-W6bwsam52LayXRXaul2tXSlloKf7Z02O7v2yUYX8r8doYxssd5pl3ut3fQpDHf0Fv5f8Qtjlpp-</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>914954188</pqid></control><display><type>article</type><title>On the relationship between efficiency and wake structure of a batoid-inspired oscillating fin</title><source>Cambridge University Press Journals Complete</source><creator>Dewey, Peter A. ; Carriou, Antoine ; Smits, Alexander J.</creator><creatorcontrib>Dewey, Peter A. ; Carriou, Antoine ; Smits, Alexander J.</creatorcontrib><description>A mechanical representation of batoid-like propulsion using a flexible fin with an elliptical planform shape is used to study the hydrodynamics of undulatory propulsion. The wake is found to consist of a series of interconnected vortex rings, whereby leading and trailing edge vortices of subsequent cycles become entangled with one another. Efficient propulsion is achieved when leading and trailing edge vortices coalesce at the spanwise location where most of the streamwise fluid momentum is concentrated in the wake of the fin. Both the Strouhal number and the wavelength are found to have a significant effect on the wake structure. In general, a decrease in wavelength promotes a wake transition from shedding a single vortex per half-oscillation period to shedding a pair of vortices per half-oscillation period. An increase in Strouhal number causes the wake to bifurcate a finite distance downstream of the trailing edge of the fin into a pair of jets oriented at an acute angle to the line of symmetry. The bifurcation distance decreases with increasing Strouhal number and wavelength, and it is shown to obey a simple scaling law.</description><identifier>ISSN: 0022-1120</identifier><identifier>EISSN: 1469-7645</identifier><identifier>DOI: 10.1017/jfm.2011.472</identifier><identifier>CODEN: JFLSA7</identifier><language>eng</language><publisher>Cambridge, UK: Cambridge University Press</publisher><subject>Applied sciences ; Computer science; control theory; systems ; Control theory. Systems ; Exact sciences and technology ; Flow velocity ; Fluid dynamics ; Fluid flow ; Fluid mechanics ; Hydrodynamics ; Numerical analysis ; Propulsion ; Robotics ; Strouhal number ; Trailing edges ; Vortices ; Wakes ; Wavelengths</subject><ispartof>Journal of fluid mechanics, 2012-01, Vol.691, p.245-266</ispartof><rights>Copyright © Cambridge University Press 2011</rights><rights>2015 INIST-CNRS</rights><rights>Copyright © Cambridge University Press 2011</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c397t-25b76f204303b9e9d63ee44ef7c07d5cb751958cc0482290e538b704085a81213</citedby><cites>FETCH-LOGICAL-c397t-25b76f204303b9e9d63ee44ef7c07d5cb751958cc0482290e538b704085a81213</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.cambridge.org/core/product/identifier/S0022112011004721/type/journal_article$$EHTML$$P50$$Gcambridge$$H</linktohtml><link.rule.ids>164,314,776,780,27901,27902,55603</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=25948138$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Dewey, Peter A.</creatorcontrib><creatorcontrib>Carriou, Antoine</creatorcontrib><creatorcontrib>Smits, Alexander J.</creatorcontrib><title>On the relationship between efficiency and wake structure of a batoid-inspired oscillating fin</title><title>Journal of fluid mechanics</title><addtitle>J. Fluid Mech</addtitle><description>A mechanical representation of batoid-like propulsion using a flexible fin with an elliptical planform shape is used to study the hydrodynamics of undulatory propulsion. The wake is found to consist of a series of interconnected vortex rings, whereby leading and trailing edge vortices of subsequent cycles become entangled with one another. Efficient propulsion is achieved when leading and trailing edge vortices coalesce at the spanwise location where most of the streamwise fluid momentum is concentrated in the wake of the fin. Both the Strouhal number and the wavelength are found to have a significant effect on the wake structure. In general, a decrease in wavelength promotes a wake transition from shedding a single vortex per half-oscillation period to shedding a pair of vortices per half-oscillation period. An increase in Strouhal number causes the wake to bifurcate a finite distance downstream of the trailing edge of the fin into a pair of jets oriented at an acute angle to the line of symmetry. The bifurcation distance decreases with increasing Strouhal number and wavelength, and it is shown to obey a simple scaling law.</description><subject>Applied sciences</subject><subject>Computer science; control theory; systems</subject><subject>Control theory. Systems</subject><subject>Exact sciences and technology</subject><subject>Flow velocity</subject><subject>Fluid dynamics</subject><subject>Fluid flow</subject><subject>Fluid mechanics</subject><subject>Hydrodynamics</subject><subject>Numerical analysis</subject><subject>Propulsion</subject><subject>Robotics</subject><subject>Strouhal number</subject><subject>Trailing edges</subject><subject>Vortices</subject><subject>Wakes</subject><subject>Wavelengths</subject><issn>0022-1120</issn><issn>1469-7645</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>BENPR</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNqFkU1LJDEQhsOyws6qN39AEIQ9bI9V6aTTOS6yXyB40atNOl3RjDPpMelG_PdmcFhBFjzV5annreJl7ARhiYD6fOU3SwGIS6nFJ7ZA2ZhKN1J9ZgsAISpEAV_Y15xXAFiD0Qt2exX5dE880dpOYYz5Pmx5T9MTUeTkfXCBonvmNg78yT4Qz1Oa3TQn4qPnlvd2GsNQhZi3IdHAx-zCeqeKd9yHeMQOvF1nOt7PQ3bz6-f1xZ_q8ur334sfl5WrjZ4qoXrdeAGyhro3ZIamJpKSvHagB-V6rdCo1jmQrRAGSNVtr0FCq2yLAutD9u3Vu03j40x56jYhOyqXRBrn3GEjhUCNJeFDFBAMSAVQ0NN36GqcUyyPdAalURLbtkDfXyGXxpwT-W6bwsam52LayXRXaul2tXSlloKf7Z02O7v2yUYX8r8doYxssd5pl3ut3fQpDHf0Fv5f8Qtjlpp-</recordid><startdate>20120125</startdate><enddate>20120125</enddate><creator>Dewey, Peter A.</creator><creator>Carriou, Antoine</creator><creator>Smits, Alexander J.</creator><general>Cambridge University Press</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7TB</scope><scope>7U5</scope><scope>7UA</scope><scope>7XB</scope><scope>88I</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>8G5</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>FR3</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>H8D</scope><scope>H96</scope><scope>HCIFZ</scope><scope>KR7</scope><scope>L.G</scope><scope>L6V</scope><scope>L7M</scope><scope>M2O</scope><scope>M2P</scope><scope>M7S</scope><scope>MBDVC</scope><scope>P5Z</scope><scope>P62</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PTHSS</scope><scope>Q9U</scope><scope>S0W</scope></search><sort><creationdate>20120125</creationdate><title>On the relationship between efficiency and wake structure of a batoid-inspired oscillating fin</title><author>Dewey, Peter A. ; Carriou, Antoine ; Smits, Alexander J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c397t-25b76f204303b9e9d63ee44ef7c07d5cb751958cc0482290e538b704085a81213</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Applied sciences</topic><topic>Computer science; control theory; systems</topic><topic>Control theory. Systems</topic><topic>Exact sciences and technology</topic><topic>Flow velocity</topic><topic>Fluid dynamics</topic><topic>Fluid flow</topic><topic>Fluid mechanics</topic><topic>Hydrodynamics</topic><topic>Numerical analysis</topic><topic>Propulsion</topic><topic>Robotics</topic><topic>Strouhal number</topic><topic>Trailing edges</topic><topic>Vortices</topic><topic>Wakes</topic><topic>Wavelengths</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Dewey, Peter A.</creatorcontrib><creatorcontrib>Carriou, Antoine</creatorcontrib><creatorcontrib>Smits, Alexander J.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Water Resources Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>Aerospace Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>SciTech Premium Collection</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>ProQuest Engineering Collection</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Research Library</collection><collection>Science Database</collection><collection>Engineering Database</collection><collection>Research Library (Corporate)</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Earth, Atmospheric & Aquatic Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>Engineering Collection</collection><collection>ProQuest Central Basic</collection><collection>DELNET Engineering & Technology Collection</collection><jtitle>Journal of fluid mechanics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Dewey, Peter A.</au><au>Carriou, Antoine</au><au>Smits, Alexander J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>On the relationship between efficiency and wake structure of a batoid-inspired oscillating fin</atitle><jtitle>Journal of fluid mechanics</jtitle><addtitle>J. Fluid Mech</addtitle><date>2012-01-25</date><risdate>2012</risdate><volume>691</volume><spage>245</spage><epage>266</epage><pages>245-266</pages><issn>0022-1120</issn><eissn>1469-7645</eissn><coden>JFLSA7</coden><abstract>A mechanical representation of batoid-like propulsion using a flexible fin with an elliptical planform shape is used to study the hydrodynamics of undulatory propulsion. The wake is found to consist of a series of interconnected vortex rings, whereby leading and trailing edge vortices of subsequent cycles become entangled with one another. Efficient propulsion is achieved when leading and trailing edge vortices coalesce at the spanwise location where most of the streamwise fluid momentum is concentrated in the wake of the fin. Both the Strouhal number and the wavelength are found to have a significant effect on the wake structure. In general, a decrease in wavelength promotes a wake transition from shedding a single vortex per half-oscillation period to shedding a pair of vortices per half-oscillation period. An increase in Strouhal number causes the wake to bifurcate a finite distance downstream of the trailing edge of the fin into a pair of jets oriented at an acute angle to the line of symmetry. The bifurcation distance decreases with increasing Strouhal number and wavelength, and it is shown to obey a simple scaling law.</abstract><cop>Cambridge, UK</cop><pub>Cambridge University Press</pub><doi>10.1017/jfm.2011.472</doi><tpages>22</tpages></addata></record> |
fulltext | fulltext |
identifier | ISSN: 0022-1120 |
ispartof | Journal of fluid mechanics, 2012-01, Vol.691, p.245-266 |
issn | 0022-1120 1469-7645 |
language | eng |
recordid | cdi_proquest_miscellaneous_1642217104 |
source | Cambridge University Press Journals Complete |
subjects | Applied sciences Computer science control theory systems Control theory. Systems Exact sciences and technology Flow velocity Fluid dynamics Fluid flow Fluid mechanics Hydrodynamics Numerical analysis Propulsion Robotics Strouhal number Trailing edges Vortices Wakes Wavelengths |
title | On the relationship between efficiency and wake structure of a batoid-inspired oscillating fin |
url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-28T23%3A26%3A47IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=On%20the%20relationship%20between%20efficiency%20and%20wake%20structure%20of%20a%20batoid-inspired%20oscillating%20fin&rft.jtitle=Journal%20of%20fluid%20mechanics&rft.au=Dewey,%20Peter%20A.&rft.date=2012-01-25&rft.volume=691&rft.spage=245&rft.epage=266&rft.pages=245-266&rft.issn=0022-1120&rft.eissn=1469-7645&rft.coden=JFLSA7&rft_id=info:doi/10.1017/jfm.2011.472&rft_dat=%3Cproquest_cross%3E2557095531%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=914954188&rft_id=info:pmid/&rft_cupid=10_1017_jfm_2011_472&rfr_iscdi=true |