Improved Two-Dimensional Dynamic Stall Prediction with Structured and Hybrid Numerical Methods
Richter, Kai and Le Pape, Arnaud and Knopp, Tobias and Costes, Michel and Gleize, Vincent and Gardner, Anthony Donald (2011) Improved Two-Dimensional Dynamic Stall Prediction with Structured and Hybrid Numerical Methods. Journal of the American Helicopter Society, Vol. 56 (4), . DOI: 10.4050/JAHS.56.042007.
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A joint comprehensive validation activity on the structured numerical method elsA and the hybrid numerical method TAU was conducted with respect to dynamic stall applications. In order to improve two-dimensional prediction, the influence of several factors on the dynamic stall prediction were investigated. The validation was performed for three deep dynamic stall test cases of the rotor blade airfoil OA209 against experimental data from two-dimensional pitching airfoil experiments, covering low speed and high speed conditions. The requirements for spatial discretization and for temporal resolution in elsA and TAU are shown. The impact of turbulence modeling is discussed for a variety of turbulence models ranging from one-equation Spalart-Allmaras-type models to state-of-the-art seven-equation Reynolds stress models. The influence of the prediction of laminar/turbulent boundary layer transition on the numerical dynamic stall simulation is described. Results of both numerical methods are compared to allow conclusions to be drawn with respect to an improved prediction of dynamic stall.
|Title:||Improved Two-Dimensional Dynamic Stall Prediction with Structured and Hybrid Numerical Methods|
|Date:||18 October 2011|
|Journal or Publication Title:||Journal of the American Helicopter Society|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Keywords:||dynamic stall, SIMCOS project, TAU, elsA, code validation, grid characteristics, turbulence modeling, transition prediction|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L RR - Rotorcraft Research|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L RR - Rotorcraft Research|
|DLR - Research theme (Project):||L - The Virtual Aerodynamic Rotorcraft|
|Institutes and Institutions:||Institute of Aerodynamics and Flow Technology > Helicopters|
Institute of Aerodynamics and Flow Technology > CASE
|Deposited By:||Kai Richter|
|Deposited On:||14 Dec 2011 10:22|
|Last Modified:||07 Feb 2013 20:35|
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