Klein, Alexander and Richter, Kai and Gardner, Anthony Donald and Altmikus, A.R.M. and Lutz, Thorsten and Krämer, E (2011) Numerical Comparison of Dynamic Stall for 2DAirfoils and an Airfoils Model in the DNW-TWG. 37th European Rotorcraft Forum, 13. - 15. Sept. 2011, Milan, Italy.
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Official URL: http://www.erf2011.org/
Abstract
The airfoil sections of helicopter rotors experience a wide range of flow conditions in forward flight from transonic flow on the advancing blade to subsonic flow and high angles of attack on the retreating blade. Most notably, the dynamic stall phenomenon has been a research topic for decades and various models have been introduced to predict the unsteady characteristics of the rotor blade undergoing unsteady separation. The objective of the present paper is to compare 2D dynamic stall computations, suitable for airfoil design studies considering unsteady characteristics, with wind tunnel environment CFD simulations taking into account three-dimensionality and wall effects. Differences between experiment and 2D computations can be partly attributed to side wall effects which alter the effective angle of attack at the mid-section pressure measurement plane. In order to gain more insight into these effects, investigations are presented which show the wind tunnel wall boundary layers and separation effects at the sidewall-airfoil junction.
Item URL in elib: | https://elib.dlr.de/70801/ | |||||||||||||||||||||
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Document Type: | Conference or Workshop Item (Lecture, Paper) | |||||||||||||||||||||
Title: | Numerical Comparison of Dynamic Stall for 2DAirfoils and an Airfoils Model in the DNW-TWG | |||||||||||||||||||||
Authors: |
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Date: | 2011 | |||||||||||||||||||||
Refereed publication: | No | |||||||||||||||||||||
Open Access: | No | |||||||||||||||||||||
Gold Open Access: | No | |||||||||||||||||||||
In SCOPUS: | No | |||||||||||||||||||||
In ISI Web of Science: | No | |||||||||||||||||||||
Page Range: | pp. 576-586 | |||||||||||||||||||||
Series Name: | Conference Proceedings on CD-ROM | |||||||||||||||||||||
Status: | Published | |||||||||||||||||||||
Keywords: | wall interference, CFD, Dynamic stall, Rotor, Helicopter, Blade, Aerodynamics, FLOWER | |||||||||||||||||||||
Event Title: | 37th European Rotorcraft Forum | |||||||||||||||||||||
Event Location: | Milan, Italy | |||||||||||||||||||||
Event Type: | international Conference | |||||||||||||||||||||
Event Dates: | 13. - 15. Sept. 2011 | |||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | |||||||||||||||||||||
HGF - Program: | Aeronautics | |||||||||||||||||||||
HGF - Program Themes: | Rotorcraft (old) | |||||||||||||||||||||
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 of Aerodynamics and Flow Technology > Helicopters | |||||||||||||||||||||
Deposited By: | Gardner, Dr.habil. Anthony | |||||||||||||||||||||
Deposited On: | 28 Sep 2011 10:57 | |||||||||||||||||||||
Last Modified: | 28 Sep 2011 10:57 |
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