Displacement thickness evaluation for semi-empirical airfoil trailing-edge noise prediction model
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s40430-015-0341-5 http://hdl.handle.net/11449/158766 |
Resumo: | This study proposes a criterion for evaluating the turbulent boundary layer displacement thickness when predicting airfoil trailing-edge noise with semi-empirical methods. The boundary layer integral parameter is usually employed as the typical turbulence length-scale in the classic NASA-BPM semi-empirical airfoil self-noise prediction model and its variations. Although the semi-empirical noise prediction methods have been, in theory, superseded by more complex and demanding simplified-theoretical methods, they arguably remain the most suitable methods for noise investigation during the preliminary design phase of airfoils and wind turbine blades. The purpose of the criterion discussed is to limit the adverse impact of the uncertainty associated with the scaling parameter into the overall intrinsic quality of the semi-empirical noise prediction method. The criterion may be then employed, along with computational efficiency, to sort out methods for the task of feeding the popular BPM noise prediction model and its variations. As an illustration of the application of the proposed criterion, the performance of CFD-RANS and XFoil codes are examined and compared with experimental data from turbulent, incompressible flow available from the literature in the range 5.0 x 10(5) < Re-C < 1.5 x 10(6). |
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Repositório Institucional da UNESP |
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Displacement thickness evaluation for semi-empirical airfoil trailing-edge noise prediction modelWind turbine noiseAirfoil trailing-edge noiseDisplacement-thickness assessmentThis study proposes a criterion for evaluating the turbulent boundary layer displacement thickness when predicting airfoil trailing-edge noise with semi-empirical methods. The boundary layer integral parameter is usually employed as the typical turbulence length-scale in the classic NASA-BPM semi-empirical airfoil self-noise prediction model and its variations. Although the semi-empirical noise prediction methods have been, in theory, superseded by more complex and demanding simplified-theoretical methods, they arguably remain the most suitable methods for noise investigation during the preliminary design phase of airfoils and wind turbine blades. The purpose of the criterion discussed is to limit the adverse impact of the uncertainty associated with the scaling parameter into the overall intrinsic quality of the semi-empirical noise prediction method. The criterion may be then employed, along with computational efficiency, to sort out methods for the task of feeding the popular BPM noise prediction model and its variations. As an illustration of the application of the proposed criterion, the performance of CFD-RANS and XFoil codes are examined and compared with experimental data from turbulent, incompressible flow available from the literature in the range 5.0 x 10(5) < Re-C < 1.5 x 10(6).Sao Paulo State Univ USP, Dept Mech Engn, Polytech Sch, Av Prof Luciano Gualberto 530, BR-05508010 Cidade Univ, SP, BrazilSao Paulo State Univ USP, Dept Mech Engn, Polytech Sch, Av Prof Luciano Gualberto 530, BR-05508010 Cidade Univ, SP, BrazilSpringerUniversidade Estadual Paulista (Unesp)Saab, Joseph Y. [UNESP]Pimenta, Marcos de Mattos [UNESP]2018-11-26T15:29:07Z2018-11-26T15:29:07Z2016-02-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article385-394application/pdfhttp://dx.doi.org/10.1007/s40430-015-0341-5Journal Of The Brazilian Society Of Mechanical Sciences And Engineering. Heidelberg: Springer Heidelberg, v. 38, n. 2, p. 385-394, 2016.1678-5878http://hdl.handle.net/11449/15876610.1007/s40430-015-0341-5WOS:000372534200008WOS000372534200008.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal Of The Brazilian Society Of Mechanical Sciences And Engineering0,362info:eu-repo/semantics/openAccess2024-01-24T06:28:06Zoai:repositorio.unesp.br:11449/158766Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:48:57.964383Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Displacement thickness evaluation for semi-empirical airfoil trailing-edge noise prediction model |
title |
Displacement thickness evaluation for semi-empirical airfoil trailing-edge noise prediction model |
spellingShingle |
Displacement thickness evaluation for semi-empirical airfoil trailing-edge noise prediction model Saab, Joseph Y. [UNESP] Wind turbine noise Airfoil trailing-edge noise Displacement-thickness assessment |
title_short |
Displacement thickness evaluation for semi-empirical airfoil trailing-edge noise prediction model |
title_full |
Displacement thickness evaluation for semi-empirical airfoil trailing-edge noise prediction model |
title_fullStr |
Displacement thickness evaluation for semi-empirical airfoil trailing-edge noise prediction model |
title_full_unstemmed |
Displacement thickness evaluation for semi-empirical airfoil trailing-edge noise prediction model |
title_sort |
Displacement thickness evaluation for semi-empirical airfoil trailing-edge noise prediction model |
author |
Saab, Joseph Y. [UNESP] |
author_facet |
Saab, Joseph Y. [UNESP] Pimenta, Marcos de Mattos [UNESP] |
author_role |
author |
author2 |
Pimenta, Marcos de Mattos [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Saab, Joseph Y. [UNESP] Pimenta, Marcos de Mattos [UNESP] |
dc.subject.por.fl_str_mv |
Wind turbine noise Airfoil trailing-edge noise Displacement-thickness assessment |
topic |
Wind turbine noise Airfoil trailing-edge noise Displacement-thickness assessment |
description |
This study proposes a criterion for evaluating the turbulent boundary layer displacement thickness when predicting airfoil trailing-edge noise with semi-empirical methods. The boundary layer integral parameter is usually employed as the typical turbulence length-scale in the classic NASA-BPM semi-empirical airfoil self-noise prediction model and its variations. Although the semi-empirical noise prediction methods have been, in theory, superseded by more complex and demanding simplified-theoretical methods, they arguably remain the most suitable methods for noise investigation during the preliminary design phase of airfoils and wind turbine blades. The purpose of the criterion discussed is to limit the adverse impact of the uncertainty associated with the scaling parameter into the overall intrinsic quality of the semi-empirical noise prediction method. The criterion may be then employed, along with computational efficiency, to sort out methods for the task of feeding the popular BPM noise prediction model and its variations. As an illustration of the application of the proposed criterion, the performance of CFD-RANS and XFoil codes are examined and compared with experimental data from turbulent, incompressible flow available from the literature in the range 5.0 x 10(5) < Re-C < 1.5 x 10(6). |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-02-01 2018-11-26T15:29:07Z 2018-11-26T15:29:07Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1007/s40430-015-0341-5 Journal Of The Brazilian Society Of Mechanical Sciences And Engineering. Heidelberg: Springer Heidelberg, v. 38, n. 2, p. 385-394, 2016. 1678-5878 http://hdl.handle.net/11449/158766 10.1007/s40430-015-0341-5 WOS:000372534200008 WOS000372534200008.pdf |
url |
http://dx.doi.org/10.1007/s40430-015-0341-5 http://hdl.handle.net/11449/158766 |
identifier_str_mv |
Journal Of The Brazilian Society Of Mechanical Sciences And Engineering. Heidelberg: Springer Heidelberg, v. 38, n. 2, p. 385-394, 2016. 1678-5878 10.1007/s40430-015-0341-5 WOS:000372534200008 WOS000372534200008.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal Of The Brazilian Society Of Mechanical Sciences And Engineering 0,362 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
385-394 application/pdf |
dc.publisher.none.fl_str_mv |
Springer |
publisher.none.fl_str_mv |
Springer |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129554531745792 |