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 Nature. 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:

Authors	Institution or Email of Authors	Author's ORCID iD	ORCID Put Code
Raffel, Markus	UNSPECIFIED	https://orcid.org/0000-0002-3340-9115	133716068
Kompenhans, Jürgen	UNSPECIFIED	https://orcid.org/0000-0001-6792-4601	UNSPECIFIED
Wernert, P.	ISL Saint-Louis/France	UNSPECIFIED	UNSPECIFIED

Date:

1995

Journal or Publication Title:

Experiments in Fluids

Refereed publication:

Yes

Open Access:

Gold Open Access:

In SCOPUS:

Yes

In ISI Web of Science:

Yes

Volume:

DOI:

10.1007/BF00193856

Page Range:

pp. 103-111

Editors:

Editors	Email	Editor's ORCID iD	ORCID Put Code
UNSPECIFIED	Springer	UNSPECIFIED	UNSPECIFIED

Publisher:

Springer Nature

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 (old)

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:

12 May 2023 13:05

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