The wake asymmetry of an airfoil with a Gurney flap and their connection with the observed lift increase

Autores
Boldes, Ulfilas; Delnero, Juan Sebastian; Marañon Di Leo, Julio; Colman, Jorge; Camocardi, Mauricio Ezequiel
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The present research analyzes the asymmetry in the rolling up shear layers downstream the blunt trailing edge of airfoils with Gurney flaps as a lift enhancing mechanism. Experimental investigations relating the asymmetry of the vortex flow in the near wake region, able to distort the flow increasing the downwash of an airfoil, have been performed. We examine the lift behaviour and near wake region characteristics of the low Reynolds number airfoil HQ17 without and with Gurney mini-flaps of different lengths. The flow immediately downstream the trailing edge down to 2 mini-flap lengths is explored in order to identify signs of asymmetry of the initial counter rotating vortex structures. Experimental evidence is presented showing that for typical lifting conditions the shear layer rollup process within the near wake is different for the upper and lower vortices: the shear layer separating from the pressure side of the airfoil begins its rollup immediately behind the trailing edge creating a stronger vortex while the shear layer from the suction side begins its rollup more downstream creating a weaker vortex. Aspects of a mechanism connecting the different evolution and pattern of these initial vortex structures with the lift increase due to these flaps are presented.
Fil: Boldes, Ulfilas. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Aeronáutica. Laboratorio de Capa Límite y Fluído Dinámica Ambiental; Argentina
Fil: Delnero, Juan Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Aeronáutica. Laboratorio de Capa Límite y Fluído Dinámica Ambiental; Argentina
Fil: Marañon Di Leo, Julio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Aeronáutica. Laboratorio de Capa Límite y Fluído Dinámica Ambiental; Argentina
Fil: Colman, Jorge. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Aeronáutica. Laboratorio de Capa Límite y Fluído Dinámica Ambiental; Argentina
Fil: Camocardi, Mauricio Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Aeronáutica. Laboratorio de Capa Límite y Fluído Dinámica Ambiental; Argentina
Materia
FLOW CONTROL
LOW REYNOLDS AERODYNAMICS
HIGH LIFT DEVICE
SHEAR LAYER
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/129634
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/129634
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The wake asymmetry of an airfoil with a Gurney flap and their connection with the observed lift increaseBoldes, UlfilasDelnero, Juan SebastianMarañon Di Leo, JulioColman, JorgeCamocardi, Mauricio EzequielFLOW CONTROLLOW REYNOLDS AERODYNAMICSHIGH LIFT DEVICESHEAR LAYERhttps://purl.org/becyt/ford/2.11https://purl.org/becyt/ford/2The present research analyzes the asymmetry in the rolling up shear layers downstream the blunt trailing edge of airfoils with Gurney flaps as a lift enhancing mechanism. Experimental investigations relating the asymmetry of the vortex flow in the near wake region, able to distort the flow increasing the downwash of an airfoil, have been performed. We examine the lift behaviour and near wake region characteristics of the low Reynolds number airfoil HQ17 without and with Gurney mini-flaps of different lengths. The flow immediately downstream the trailing edge down to 2 mini-flap lengths is explored in order to identify signs of asymmetry of the initial counter rotating vortex structures. Experimental evidence is presented showing that for typical lifting conditions the shear layer rollup process within the near wake is different for the upper and lower vortices: the shear layer separating from the pressure side of the airfoil begins its rollup immediately behind the trailing edge creating a stronger vortex while the shear layer from the suction side begins its rollup more downstream creating a weaker vortex. Aspects of a mechanism connecting the different evolution and pattern of these initial vortex structures with the lift increase due to these flaps are presented.Fil: Boldes, Ulfilas. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Aeronáutica. Laboratorio de Capa Límite y Fluído Dinámica Ambiental; ArgentinaFil: Delnero, Juan Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Aeronáutica. Laboratorio de Capa Límite y Fluído Dinámica Ambiental; ArgentinaFil: Marañon Di Leo, Julio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Aeronáutica. Laboratorio de Capa Límite y Fluído Dinámica Ambiental; ArgentinaFil: Colman, Jorge. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Aeronáutica. Laboratorio de Capa Límite y Fluído Dinámica Ambiental; ArgentinaFil: Camocardi, Mauricio Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Aeronáutica. Laboratorio de Capa Límite y Fluído Dinámica Ambiental; ArgentinaPraise Worthy Prize2010-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/129634Boldes, Ulfilas; Delnero, Juan Sebastian; Marañon Di Leo, Julio; Colman, Jorge; Camocardi, Mauricio Ezequiel; The wake asymmetry of an airfoil with a Gurney flap and their connection with the observed lift increase; Praise Worthy Prize; International Review of Aerospace Engineering; 3; 2; 4-2010; 89-951973-7459CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.praiseworthyprize.org/latest_issues/IREASE-latest/IREASE_vol_3_n_2.html#The_Wake_Asymmetry_of_an_Airfoil_with_a_Gurney_Flap_and_their_Connection_with_the_Observed_Lift_Increaseinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:19:19Zoai:ri.conicet.gov.ar:11336/129634instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 15:19:19.278CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The wake asymmetry of an airfoil with a Gurney flap and their connection with the observed lift increase
title The wake asymmetry of an airfoil with a Gurney flap and their connection with the observed lift increase
spellingShingle The wake asymmetry of an airfoil with a Gurney flap and their connection with the observed lift increase
Boldes, Ulfilas
FLOW CONTROL
LOW REYNOLDS AERODYNAMICS
HIGH LIFT DEVICE
SHEAR LAYER
title_short The wake asymmetry of an airfoil with a Gurney flap and their connection with the observed lift increase
title_full The wake asymmetry of an airfoil with a Gurney flap and their connection with the observed lift increase
title_fullStr The wake asymmetry of an airfoil with a Gurney flap and their connection with the observed lift increase
title_full_unstemmed The wake asymmetry of an airfoil with a Gurney flap and their connection with the observed lift increase
title_sort The wake asymmetry of an airfoil with a Gurney flap and their connection with the observed lift increase
dc.creator.none.fl_str_mv Boldes, Ulfilas
Delnero, Juan Sebastian
Marañon Di Leo, Julio
Colman, Jorge
Camocardi, Mauricio Ezequiel
author Boldes, Ulfilas
author_facet Boldes, Ulfilas
Delnero, Juan Sebastian
Marañon Di Leo, Julio
Colman, Jorge
Camocardi, Mauricio Ezequiel
author_role author
author2 Delnero, Juan Sebastian
Marañon Di Leo, Julio
Colman, Jorge
Camocardi, Mauricio Ezequiel
author2_role author
author
author
author
dc.subject.none.fl_str_mv FLOW CONTROL
LOW REYNOLDS AERODYNAMICS
HIGH LIFT DEVICE
SHEAR LAYER
topic FLOW CONTROL
LOW REYNOLDS AERODYNAMICS
HIGH LIFT DEVICE
SHEAR LAYER
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.11
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The present research analyzes the asymmetry in the rolling up shear layers downstream the blunt trailing edge of airfoils with Gurney flaps as a lift enhancing mechanism. Experimental investigations relating the asymmetry of the vortex flow in the near wake region, able to distort the flow increasing the downwash of an airfoil, have been performed. We examine the lift behaviour and near wake region characteristics of the low Reynolds number airfoil HQ17 without and with Gurney mini-flaps of different lengths. The flow immediately downstream the trailing edge down to 2 mini-flap lengths is explored in order to identify signs of asymmetry of the initial counter rotating vortex structures. Experimental evidence is presented showing that for typical lifting conditions the shear layer rollup process within the near wake is different for the upper and lower vortices: the shear layer separating from the pressure side of the airfoil begins its rollup immediately behind the trailing edge creating a stronger vortex while the shear layer from the suction side begins its rollup more downstream creating a weaker vortex. Aspects of a mechanism connecting the different evolution and pattern of these initial vortex structures with the lift increase due to these flaps are presented.
Fil: Boldes, Ulfilas. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Aeronáutica. Laboratorio de Capa Límite y Fluído Dinámica Ambiental; Argentina
Fil: Delnero, Juan Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Aeronáutica. Laboratorio de Capa Límite y Fluído Dinámica Ambiental; Argentina
Fil: Marañon Di Leo, Julio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Aeronáutica. Laboratorio de Capa Límite y Fluído Dinámica Ambiental; Argentina
Fil: Colman, Jorge. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Aeronáutica. Laboratorio de Capa Límite y Fluído Dinámica Ambiental; Argentina
Fil: Camocardi, Mauricio Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ingeniería. Departamento de Aeronáutica. Laboratorio de Capa Límite y Fluído Dinámica Ambiental; Argentina
description The present research analyzes the asymmetry in the rolling up shear layers downstream the blunt trailing edge of airfoils with Gurney flaps as a lift enhancing mechanism. Experimental investigations relating the asymmetry of the vortex flow in the near wake region, able to distort the flow increasing the downwash of an airfoil, have been performed. We examine the lift behaviour and near wake region characteristics of the low Reynolds number airfoil HQ17 without and with Gurney mini-flaps of different lengths. The flow immediately downstream the trailing edge down to 2 mini-flap lengths is explored in order to identify signs of asymmetry of the initial counter rotating vortex structures. Experimental evidence is presented showing that for typical lifting conditions the shear layer rollup process within the near wake is different for the upper and lower vortices: the shear layer separating from the pressure side of the airfoil begins its rollup immediately behind the trailing edge creating a stronger vortex while the shear layer from the suction side begins its rollup more downstream creating a weaker vortex. Aspects of a mechanism connecting the different evolution and pattern of these initial vortex structures with the lift increase due to these flaps are presented.
publishDate 2010
dc.date.none.fl_str_mv 2010-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/129634
Boldes, Ulfilas; Delnero, Juan Sebastian; Marañon Di Leo, Julio; Colman, Jorge; Camocardi, Mauricio Ezequiel; The wake asymmetry of an airfoil with a Gurney flap and their connection with the observed lift increase; Praise Worthy Prize; International Review of Aerospace Engineering; 3; 2; 4-2010; 89-95
1973-7459
CONICET Digital
CONICET
url http://hdl.handle.net/11336/129634
identifier_str_mv Boldes, Ulfilas; Delnero, Juan Sebastian; Marañon Di Leo, Julio; Colman, Jorge; Camocardi, Mauricio Ezequiel; The wake asymmetry of an airfoil with a Gurney flap and their connection with the observed lift increase; Praise Worthy Prize; International Review of Aerospace Engineering; 3; 2; 4-2010; 89-95
1973-7459
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.praiseworthyprize.org/latest_issues/IREASE-latest/IREASE_vol_3_n_2.html#The_Wake_Asymmetry_of_an_Airfoil_with_a_Gurney_Flap_and_their_Connection_with_the_Observed_Lift_Increase
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Praise Worthy Prize
publisher.none.fl_str_mv Praise Worthy Prize
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1846083341915258880
score 13.22299

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