Numerical Investigation of Three-Dimensional Static and Dynamic Stall on a Finite Wing
Three-dimensional numerical computations using ONERA's structured elsA code and the unstructured DLR-TAU code are compared with the OA209 finite wing experiments in static stall and dynamic stall conditions at a Mach number of 0.16 and a Reynolds number of 1 × 106. The DLR-TAU computations were...
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Published in | Journal of the American Helicopter Society Vol. 60; no. 3; pp. 1 - 12 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
AHS International
01.07.2015
Vertical Flight Society |
Subjects | |
Online Access | Get full text |
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Summary: | Three-dimensional numerical computations using ONERA's structured elsA code and the unstructured DLR-TAU code are compared with the OA209 finite wing experiments in static stall and dynamic stall conditions at a Mach number of 0.16 and a Reynolds number of 1 × 106.
The DLR-TAU computations were run with the Spalart-Allmaras and Menter shear stress transport (SST) turbulence models, and the elsA computations were carried out using the Spalart-Allmaras and the k-ω Kok + SST turbulence models. Although comparable grids
were used, the static simulations show large discrepancies in the stall region between the structured and unstructured approaches. Large differences for the three-dimensional dynamic stall case are obtained with the computations using the Spalart-Allmaras turbulence model showing trailing
edge separation only in contrast to the leading edge stall in the experiment. The three-dimensional dynamic stall computations with the two-equation turbulence models are in good agreement with the unsteady pressure measurements and flow field visualizations of the experiment, but also show
a shift in the stall angle compared to the experiment. The analysis of the flow field around the finite wing using the numerical simulations reveals the evolution of the Ω-shaped vortex, generated by the interaction of the blade tip vortex. |
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Bibliography: | 2161-6027(20150701)60:3L.1;1- |
ISSN: | 2161-6027 0002-8711 2161-6027 |
DOI: | 10.4050/JAHS.60.032004 |