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Experimental investigation of mini Gurney flaps in combination with vortex generators for improved wind turbine blade performance
Jörg Alber,
Marinos Manolesos,
Guido Weinzierl-Dlugosch,
Johannes Fischer,
Alexander Schönmeier,
Christian Navid Nayeri,
Christian Oliver Paschereit,
Joachim Twele,
Jens Fortmann 
,
Pier Francesco Melani,
Alessandro Bianchini
,
Pier Francesco Melani,
Alessandro Bianchini
Wind Energy Science, Volume: 7, Issue: 3, Pages: 943 - 965
Swansea University Author: Marinos Manolesos
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DOI (Published version): 10.5194/wes-7-943-2022
Abstract
This wind tunnel study investigates the aerodynamic effects of mini Gurney flaps (MGFs) and their combination with vortex generators (VGs) on the performance of airfoils and wind turbine rotor blades. VGs are installed on the suction side aiming at stall delay and increased maximum lift. MGFs are th...
| Published in: | Wind Energy Science |
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| ISSN: | 2366-7451 |
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Copernicus GmbH
2022
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa60343 |
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<?xml version="1.0"?><rfc1807><datestamp>2022-07-13T15:44:52.4635092</datestamp><bib-version>v2</bib-version><id>60343</id><entry>2022-07-01</entry><title>Experimental investigation of mini Gurney flaps in combination with vortex generators for improved wind turbine blade performance</title><swanseaauthors><author><sid>44a3e0d351ccd7a8365d5fc7c50c8778</sid><firstname>Marinos</firstname><surname>Manolesos</surname><name>Marinos Manolesos</name><active>true</active><ethesisStudent>false</ethesisStudent></author></swanseaauthors><date>2022-07-01</date><deptcode>FGSEN</deptcode><abstract>This wind tunnel study investigates the aerodynamic effects of mini Gurney flaps (MGFs) and their combination with vortex generators (VGs) on the performance of airfoils and wind turbine rotor blades. VGs are installed on the suction side aiming at stall delay and increased maximum lift. MGFs are thin angle profiles that are attached at the trailing edge in order to increase lift at pre-stall operation. The implementation of both these passive flow control devices is accompanied by a certain drag penalty. The wind tunnel tests are conducted at the Hermann-Föttinger Institut of the Technische Universität Berlin based on two airfoils that are characteristic of different sections of large rotor blades. Lift and drag are determined using a force balance and a wake rake, respectively, for static angles of attack between −5 and 17∘ at a Reynolds number of 1.5 million. The impact of different MGF heights including 0.25 %, 0.5 % and 1.0 % and a VG height of 1.1 % of the chord length is tested and evaluated. Furthermore, the clean and the tripped baseline cases are considered. In the latter, leading-edge transition is forced with Zig Zag (ZZ) turbulator tape. The preferred configurations are the smallest MGF on the NACA63(3)618 and the medium-sized MGF combined with VGs on the DU97W300. Next, the experimental lift and drag polar data are imported into the software QBlade in order to design a generic rotor blade. The blade performance is simulated with and without the add-ons by means of two case studies. In the first case, the retrofit application on an existing blade mitigates the adverse effects of the ZZ tape. Stall is delayed and the aerodynamic efficiency is partly recovered leading to an improvement of the power curve. In the second case, the new design application allows for the design of a more slender blade while maintaining the rotor power. This alternative blade appears to be more resistant against the adverse effects of forced leading-edge transition.</abstract><type>Journal Article</type><journal>Wind Energy Science</journal><volume>7</volume><journalNumber>3</journalNumber><paginationStart>943</paginationStart><paginationEnd>965</paginationEnd><publisher>Copernicus GmbH</publisher><placeOfPublication/><isbnPrint/><isbnElectronic/><issnPrint/><issnElectronic>2366-7451</issnElectronic><keywords/><publishedDay>3</publishedDay><publishedMonth>5</publishedMonth><publishedYear>2022</publishedYear><publishedDate>2022-05-03</publishedDate><doi>10.5194/wes-7-943-2022</doi><url/><notes>Data availability:Measurement data and results can be provided by contacting the corresponding author.</notes><college>COLLEGE NANME</college><department>Science and Engineering - Faculty</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>FGSEN</DepartmentCode><institution>Swansea University</institution><apcterm/><lastEdited>2022-07-13T15:44:52.4635092</lastEdited><Created>2022-07-01T08:57:59.5390696</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Engineering and Applied Sciences - Uncategorised</level></path><authors><author><firstname>Jörg</firstname><surname>Alber</surname><order>1</order></author><author><firstname>Marinos</firstname><surname>Manolesos</surname><order>2</order></author><author><firstname>Guido</firstname><surname>Weinzierl-Dlugosch</surname><order>3</order></author><author><firstname>Johannes</firstname><surname>Fischer</surname><order>4</order></author><author><firstname>Alexander</firstname><surname>Schönmeier</surname><order>5</order></author><author><firstname>Christian Navid</firstname><surname>Nayeri</surname><order>6</order></author><author><firstname>Christian Oliver</firstname><surname>Paschereit</surname><order>7</order></author><author><firstname>Joachim</firstname><surname>Twele</surname><order>8</order></author><author><firstname>Jens</firstname><surname>Fortmann</surname><orcid>0000-0002-0189-3483</orcid><order>9</order></author><author><firstname>Pier Francesco</firstname><surname>Melani</surname><order>10</order></author><author><firstname>Alessandro</firstname><surname>Bianchini</surname><orcid>0000-0002-8042-5863</orcid><order>11</order></author></authors><documents><document><filename>60343__24582__e33eae1deaa94556841b82adbeab79ec.pdf</filename><originalFilename>60343.pdf</originalFilename><uploaded>2022-07-13T15:43:07.5078464</uploaded><type>Output</type><contentLength>8039112</contentLength><contentType>application/pdf</contentType><version>Version of Record</version><cronfaStatus>true</cronfaStatus><documentNotes>© Author(s) 2022. 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| spelling |
2022-07-13T15:44:52.4635092 v2 60343 2022-07-01 Experimental investigation of mini Gurney flaps in combination with vortex generators for improved wind turbine blade performance 44a3e0d351ccd7a8365d5fc7c50c8778 Marinos Manolesos Marinos Manolesos true false 2022-07-01 FGSEN This wind tunnel study investigates the aerodynamic effects of mini Gurney flaps (MGFs) and their combination with vortex generators (VGs) on the performance of airfoils and wind turbine rotor blades. VGs are installed on the suction side aiming at stall delay and increased maximum lift. MGFs are thin angle profiles that are attached at the trailing edge in order to increase lift at pre-stall operation. The implementation of both these passive flow control devices is accompanied by a certain drag penalty. The wind tunnel tests are conducted at the Hermann-Föttinger Institut of the Technische Universität Berlin based on two airfoils that are characteristic of different sections of large rotor blades. Lift and drag are determined using a force balance and a wake rake, respectively, for static angles of attack between −5 and 17∘ at a Reynolds number of 1.5 million. The impact of different MGF heights including 0.25 %, 0.5 % and 1.0 % and a VG height of 1.1 % of the chord length is tested and evaluated. Furthermore, the clean and the tripped baseline cases are considered. In the latter, leading-edge transition is forced with Zig Zag (ZZ) turbulator tape. The preferred configurations are the smallest MGF on the NACA63(3)618 and the medium-sized MGF combined with VGs on the DU97W300. Next, the experimental lift and drag polar data are imported into the software QBlade in order to design a generic rotor blade. The blade performance is simulated with and without the add-ons by means of two case studies. In the first case, the retrofit application on an existing blade mitigates the adverse effects of the ZZ tape. Stall is delayed and the aerodynamic efficiency is partly recovered leading to an improvement of the power curve. In the second case, the new design application allows for the design of a more slender blade while maintaining the rotor power. This alternative blade appears to be more resistant against the adverse effects of forced leading-edge transition. Journal Article Wind Energy Science 7 3 943 965 Copernicus GmbH 2366-7451 3 5 2022 2022-05-03 10.5194/wes-7-943-2022 Data availability:Measurement data and results can be provided by contacting the corresponding author. COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2022-07-13T15:44:52.4635092 2022-07-01T08:57:59.5390696 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Jörg Alber 1 Marinos Manolesos 2 Guido Weinzierl-Dlugosch 3 Johannes Fischer 4 Alexander Schönmeier 5 Christian Navid Nayeri 6 Christian Oliver Paschereit 7 Joachim Twele 8 Jens Fortmann 0000-0002-0189-3483 9 Pier Francesco Melani 10 Alessandro Bianchini 0000-0002-8042-5863 11 60343__24582__e33eae1deaa94556841b82adbeab79ec.pdf 60343.pdf 2022-07-13T15:43:07.5078464 Output 8039112 application/pdf Version of Record true © Author(s) 2022. This work is distributed under the Creative Commons Attribution 4.0 License true eng https://creativecommons.org/licenses/by/4.0/ |
| title |
Experimental investigation of mini Gurney flaps in combination with vortex generators for improved wind turbine blade performance |
| spellingShingle |
Experimental investigation of mini Gurney flaps in combination with vortex generators for improved wind turbine blade performance Marinos Manolesos |
| title_short |
Experimental investigation of mini Gurney flaps in combination with vortex generators for improved wind turbine blade performance |
| title_full |
Experimental investigation of mini Gurney flaps in combination with vortex generators for improved wind turbine blade performance |
| title_fullStr |
Experimental investigation of mini Gurney flaps in combination with vortex generators for improved wind turbine blade performance |
| title_full_unstemmed |
Experimental investigation of mini Gurney flaps in combination with vortex generators for improved wind turbine blade performance |
| title_sort |
Experimental investigation of mini Gurney flaps in combination with vortex generators for improved wind turbine blade performance |
| author_id_str_mv |
44a3e0d351ccd7a8365d5fc7c50c8778 |
| author_id_fullname_str_mv |
44a3e0d351ccd7a8365d5fc7c50c8778_***_Marinos Manolesos |
| author |
Marinos Manolesos |
| author2 |
Jörg Alber Marinos Manolesos Guido Weinzierl-Dlugosch Johannes Fischer Alexander Schönmeier Christian Navid Nayeri Christian Oliver Paschereit Joachim Twele Jens Fortmann Pier Francesco Melani Alessandro Bianchini |
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Journal article |
| container_title |
Wind Energy Science |
| container_volume |
7 |
| container_issue |
3 |
| container_start_page |
943 |
| publishDate |
2022 |
| institution |
Swansea University |
| issn |
2366-7451 |
| doi_str_mv |
10.5194/wes-7-943-2022 |
| publisher |
Copernicus GmbH |
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Faculty of Science and Engineering |
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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised |
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| description |
This wind tunnel study investigates the aerodynamic effects of mini Gurney flaps (MGFs) and their combination with vortex generators (VGs) on the performance of airfoils and wind turbine rotor blades. VGs are installed on the suction side aiming at stall delay and increased maximum lift. MGFs are thin angle profiles that are attached at the trailing edge in order to increase lift at pre-stall operation. The implementation of both these passive flow control devices is accompanied by a certain drag penalty. The wind tunnel tests are conducted at the Hermann-Föttinger Institut of the Technische Universität Berlin based on two airfoils that are characteristic of different sections of large rotor blades. Lift and drag are determined using a force balance and a wake rake, respectively, for static angles of attack between −5 and 17∘ at a Reynolds number of 1.5 million. The impact of different MGF heights including 0.25 %, 0.5 % and 1.0 % and a VG height of 1.1 % of the chord length is tested and evaluated. Furthermore, the clean and the tripped baseline cases are considered. In the latter, leading-edge transition is forced with Zig Zag (ZZ) turbulator tape. The preferred configurations are the smallest MGF on the NACA63(3)618 and the medium-sized MGF combined with VGs on the DU97W300. Next, the experimental lift and drag polar data are imported into the software QBlade in order to design a generic rotor blade. The blade performance is simulated with and without the add-ons by means of two case studies. In the first case, the retrofit application on an existing blade mitigates the adverse effects of the ZZ tape. Stall is delayed and the aerodynamic efficiency is partly recovered leading to an improvement of the power curve. In the second case, the new design application allows for the design of a more slender blade while maintaining the rotor power. This alternative blade appears to be more resistant against the adverse effects of forced leading-edge transition. |
| published_date |
2022-05-03T04:18:22Z |
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1763754222644363264 |
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11.013171 |