Aspects of the influence of an oscillating mini-flap upon the near wake of an airfoil NACA 4412
A NACA 4412 airfoil was tested, in a boundary layer wind tunnel, with the aim to study the effect of a Gurney mini-flap, as an active and passive flow control device submitted to a turbulent flow field. The main objective was the experimental determination of flow pattern characteristics downstream...
Guardado en:
Autores principales: | , , , , , , |
---|---|
Formato: | Articulo |
Lenguaje: | Inglés |
Publicado: |
2011
|
Materias: | |
Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/84351 |
Aporte de: |
id |
I19-R120-10915-84351 |
---|---|
record_format |
dspace |
institution |
Universidad Nacional de La Plata |
institution_str |
I-19 |
repository_str |
R-120 |
collection |
SEDICI (UNLP) |
language |
Inglés |
topic |
Ingeniería Aeronáutica Perfil alar Gurney mini-flap |
spellingShingle |
Ingeniería Aeronáutica Perfil alar Gurney mini-flap Delnero, Juan Sebastián Marañón Di Leo, Julio Colman Lerner, Jorge León García Saínz, Mariano Oscar Muñoz, Federico Hérouard, N. Camocardi, Mauricio Ezequiel Aspects of the influence of an oscillating mini-flap upon the near wake of an airfoil NACA 4412 |
topic_facet |
Ingeniería Aeronáutica Perfil alar Gurney mini-flap |
description |
A NACA 4412 airfoil was tested, in a boundary layer wind tunnel, with the aim to study the effect of a Gurney mini-flap, as an active and passive flow control device submitted to a turbulent flow field. The main objective was the experimental determination of flow pattern characteristics downstream the airfoil in the near wake. The untwisted wing model used for the experiments had 80cm wingspan and 50cm chord, with airfoil NACA 4412. The mini-flap was located on the lower surface at a distance, from the trailing edge, of 8%c (c airfoil chord). The Reynolds number, based upon the wing chord and the mean free stream velocity was 326,000 and 489,000. The turbulence intensity was 1.8%. The model was located into the wind tunnel between two panels, in order to assure a close approximation to two-dimensional flow over the model. As an active control device a rotating mini-flaps, geared by an electromechanical system (which rotate to a 30°) was constructed. The wake pattern and pressure values near the trailing edge were measured. The results obtained, for this mechanism, show us that the oscillating mini-flap change the wake flow pattern, alleviating the near wake turbulence and enhancing the vortex pair near the trailing edge at the mini-flap level and below that level, magnifying the effect described first by Liebeck [1]. That effect grows with the oscillating frequency. Additionally, the wake alleviation probably affects also the far wake. All of these facts suggest us to continue with the experiments, trying to measure the pressure distribution around the airfoil in all the cases, obtaining the lift and drag characteristics. |
format |
Articulo Articulo |
author |
Delnero, Juan Sebastián Marañón Di Leo, Julio Colman Lerner, Jorge León García Saínz, Mariano Oscar Muñoz, Federico Hérouard, N. Camocardi, Mauricio Ezequiel |
author_facet |
Delnero, Juan Sebastián Marañón Di Leo, Julio Colman Lerner, Jorge León García Saínz, Mariano Oscar Muñoz, Federico Hérouard, N. Camocardi, Mauricio Ezequiel |
author_sort |
Delnero, Juan Sebastián |
title |
Aspects of the influence of an oscillating mini-flap upon the near wake of an airfoil NACA 4412 |
title_short |
Aspects of the influence of an oscillating mini-flap upon the near wake of an airfoil NACA 4412 |
title_full |
Aspects of the influence of an oscillating mini-flap upon the near wake of an airfoil NACA 4412 |
title_fullStr |
Aspects of the influence of an oscillating mini-flap upon the near wake of an airfoil NACA 4412 |
title_full_unstemmed |
Aspects of the influence of an oscillating mini-flap upon the near wake of an airfoil NACA 4412 |
title_sort |
aspects of the influence of an oscillating mini-flap upon the near wake of an airfoil naca 4412 |
publishDate |
2011 |
url |
http://sedici.unlp.edu.ar/handle/10915/84351 |
work_keys_str_mv |
AT delnerojuansebastian aspectsoftheinfluenceofanoscillatingminiflapuponthenearwakeofanairfoilnaca4412 AT maranondileojulio aspectsoftheinfluenceofanoscillatingminiflapuponthenearwakeofanairfoilnaca4412 AT colmanlernerjorgeleon aspectsoftheinfluenceofanoscillatingminiflapuponthenearwakeofanairfoilnaca4412 AT garciasainzmarianooscar aspectsoftheinfluenceofanoscillatingminiflapuponthenearwakeofanairfoilnaca4412 AT munozfederico aspectsoftheinfluenceofanoscillatingminiflapuponthenearwakeofanairfoilnaca4412 AT herouardn aspectsoftheinfluenceofanoscillatingminiflapuponthenearwakeofanairfoilnaca4412 AT camocardimauricioezequiel aspectsoftheinfluenceofanoscillatingminiflapuponthenearwakeofanairfoilnaca4412 |
bdutipo_str |
Repositorios |
_version_ |
1764820488628994048 |