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

Experiments on Heave / Pitch Limit-Cycle Oscillations of a Supercritical Airfoil

Dietz, G. and Schewe, G. and Mai, H. (2005) Experiments on Heave / Pitch Limit-Cycle Oscillations of a Supercritical Airfoil. In: Vortex dominated flows: A volume celebrating Lu Ting's 80th birthday World Scientific, New Jersey, London, Singapore, Bijing, Shanghai, Hong Kong, Taipeo, Chennai. pp. 43-66. ISBN 981-256-320-2.

Full text not available from this repository.

Abstract

Results from flutter experiments of the supercritical airfoil NLR 7301 at flow conditions near the transonic dip are presented. The airfoil was mounted with two degrees-of-freedom in an adaptive solid-wall wind tunnel, and boundary-layer transition was tripped. The results link the global aerodynamic force behavior to the observed LCOs and the identified transonic dip. The time lag of the lift response to the pitching motion of the airfoil appears to be responsible for the characteristic shape of the transonic dip. The amplitude limitation of the LCOs results from a slightly nonlinear dependency of lift and moment on the amplitude of the airfoil motion. LCOs can be controlled by relatively small forces, but amplitudes strongly depend on the damping of the aeroelastic system.

Document Type:Book Section
Additional Information: LIDO-Berichtsjahr=2005,
Title:Experiments on Heave / Pitch Limit-Cycle Oscillations of a Supercritical Airfoil
Authors:
AuthorsInstitution or Email of Authors
Dietz, G.UNSPECIFIED
Schewe, G.UNSPECIFIED
Mai, H.UNSPECIFIED
Date:2005
Journal or Publication Title:Vortex dominated flows: A volume celebrating Lu Ting's 80th birthday
Refereed publication:Yes
In ISI Web of Science:No
Page Range:pp. 43-66
Editors:
EditorsEmail
Denis Blackmore, UNSPECIFIED
Egon Krause, UNSPECIFIED
Chee Tung, UNSPECIFIED
Publisher:World Scientific, New Jersey, London, Singapore, Bijing, Shanghai, Hong Kong, Taipeo, Chennai
ISBN:981-256-320-2
Status:Published
Keywords:Limit Cycle Oscillations, LCO, Transonic Dip, Flutter
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Daniela Erdmann
Deposited On:09 Oct 2005
Last Modified:14 Jan 2010 19:42

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.