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Investigation of Dynamic Stall On-Set

Geissler, Wolfgang and Haselmeyer, Hartmut (2006) Investigation of Dynamic Stall On-Set. Aerospace Science and Technology, pp. 590-600. Elsevier Masson SAS. DOI: 10.1016/j.ast2006.05.001

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Abstract

In a 2003 test campaign in the DLR-VAG dynamic stall test stand unsteady pressure distributions during dynamic stall have been measured on a 2D-wing model with OA312 airfoil section. To investigate the effect of transition on dynamic stall on-set different tripping devices have been fixed at the leading edge of the model. Adhesive tapes of different thickness as well as corundum with various grains have been used as tripping material. In addition to the experiments numerical calculations have been carried out based on the solution of the unsteady 2D-RANS-equations including a turbulence and transition model. In the present investigation it is shown that different physical flow phenomena can be identified which are triggering the on-set procedure of dynamic stall. Three different flow-scenarios have been studied in detail: 1) Free transition during dynamic stall, (M=0.2). 2) Fully turbulent flow, (M=0.2). 3) Flow at M=0.4, compressibility effects. Unsteady measured and calculated pressures have been compared for these cases and good agreement have been found. The calculations then are used for detailed flow investigations including the development of leading edge separation bubbles as well as trailing edge separation areas.

Item URL in elib:https://elib.dlr.de/46605/
Document Type:Article
Title:Investigation of Dynamic Stall On-Set
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Geissler, WolfgangUNSPECIFIEDUNSPECIFIED
Haselmeyer, HartmutUNSPECIFIEDUNSPECIFIED
Date:2006
Journal or Publication Title:Aerospace Science and Technology
Refereed publication:Yes
Open Access:No
In DOAJ:No
In SCOPUS:No
In ISI Web of Science:Yes
DOI :10.1016/j.ast2006.05.001
Page Range:pp. 590-600
Publisher:Elsevier Masson SAS
Status:Published
Keywords:Dynamic stall; Unsteady separated flow; Transition; Stall onset; Separation bubble
HGF - Research field:Aeronautics, Space and Transport (old)
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 > High Speed Configurations
Deposited By: Schmidt-Schüpferling, Karin
Deposited On:08 Jan 2007
Last Modified:27 Apr 2009 13:23

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