elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

Advanced flow velocity field metrology and their application to helicopter aerodynamics

Raffel, M. and Bretthauer, B. and Dewhirst, T. and Vollmers, H. (1998) Advanced flow velocity field metrology and their application to helicopter aerodynamics. Advanced flow velocity field metrology and their application to helicopter aerodynamics, Marseille/Frankreich, 17. September 1998.

Full text not available from this repository.

Abstract

Particle image velocimetry (PIV) is increasingly used to investigate unsteady velocity fields instantaneously. PIV allows the recording of a complete velocity field in a plane of the flow within a few microseconds. It thereby provides information about unsteady flow fields which is difficult to obtain with other experimental techniques. The short acquisition times and fast availability of data reduce the operational time and hence cost in large-scale wind tunnels and test facilities. This is especially interesting for investigations related to noise emission of helicopters, which become more and more important, and for studies related to adapive blade profiles. The induced velocities of the blade tip vorticies, the vortex strenght, and miss-distance relative to the advancing rotor blades are object of many wind tunnel investigations. Measurements of local flow vectors at positions close to the rotor blade tips were performed in the Large Low-speed wind tunnel Facility (LLF) of the German-Dutch Wind tunnel (DNW). Aditionally, measurements on pitching airfoils including adaptive techniques are presented and discussed. These tests were conducted in DNW's transonic wind tunnel (TWG) in Göttingen

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1999,
Title:Advanced flow velocity field metrology and their application to helicopter aerodynamics
Authors:
AuthorsInstitution or Email of Authors
Raffel, M.UNSPECIFIED
Bretthauer, B.UNSPECIFIED
Dewhirst, T.UNSPECIFIED
Vollmers, H.UNSPECIFIED
Date:1998
Page Range:TE08-1-TE08-6
Status:Published
Event Title:Advanced flow velocity field metrology and their application to helicopter aerodynamics, Marseille/Frankreich, 17. September 1998
Organizer:European Rotorcraft Forum
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L DT - Drehflüglertechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 20:30

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.