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Investigation of the unsteady flow velocity field above an airfoil pitching under deep dynamic stall conditions

Raffel, Markus and Kompenhans, Jürgen and Wernert, P. (1995) Investigation of the unsteady flow velocity field above an airfoil pitching under deep dynamic stall conditions. Experiments in Fluids, 19 (2), pp. 103-111. Springer. DOI: 10.1007/BF00193856 ISSN 0723-4864

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Official URL: https://link.springer.com/article/10.1007/BF00193856

Abstract

The unsteady flow field above a NACA 0012 airfoil pitching under deep dynamic stall conditions has been investigated in a low-speed wind tunnel by means of particle image velocimetry. The measurements of the instantaneous flow velocity field show the characteristic features of the dynamic stall process: formation and development of an organized vortex structure for increasing incidences and the subsequent separation. Vorticity and divergence estimated from the measured data give a good insight into the complex flow behaviour during the downstroke motion. Furthermore, small-scale structures could be observed in the separated flow field and even within the dynamic stall vortex.

Item URL in elib:https://elib.dlr.de/127715/
Document Type:Article
Title:Investigation of the unsteady flow velocity field above an airfoil pitching under deep dynamic stall conditions
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Raffel, MarkusMarkus.Raffel (at) dlr.dehttps://orcid.org/0000-0002-3340-9115
Kompenhans, JürgenJuergen.Kompenhans (at) dlr.dehttps://orcid.org/0000-0001-6792-4601
Wernert, P.ISL Saint-Louis/FranceUNSPECIFIED
Date:1995
Journal or Publication Title:Experiments in Fluids
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:19
DOI :10.1007/BF00193856
Page Range:pp. 103-111
Editors:
EditorsEmail
UNSPECIFIEDSpringer
Publisher:Springer
ISSN:0723-4864
Status:Published
Keywords:NACA 0012, unsteady flow velocity field, deep dynamic stall conditions
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Virtual Aerodynamic Rotorcraft
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, GO
Institute for Aerodynamics and Flow Technology > Experimental Methods, GO
Deposited By: Winkels, Elisabeth
Deposited On:07 Jun 2019 17:48
Last Modified:26 Sep 2019 09:23

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