Title: High-Accuracy Low-Re Simulations of Airfoil-Gust and Airfoil-Vortex Interactions
Abstract: The current work completes a high-accuracy 2D study of nonlinear viscous interaction of SD7003 airfoil with nonuniform, unsteady incoming flow initiated in Ref. [1]. A laminar mean flow is considered with M=0.1 and Re=10,000 typical of MAV applications in which an encounter with upstream vortical flow structures may induce particularly significant aerodynamic and aeroelastic responses. Previous and new results obtained for the aerodynamic airfoil response to time-harmonic and sharp-edge gust perturbations with variable gust amplitude, frequency, dimension and duration are discussed in comparison with “equivalent” pitching simulations as well as corresponding predictions based on the linearized inviscid, incompressible unsteady aerodynamic theory. In addition, results obtained for the airfoil response to an upstream Taylor vortex are presented and compared against sharp-edge gust solutions. Preliminary 3D ILES computations of the vortex-airfoil interaction are also conducted and compared with 2D predictions in a transitional flow regime.
Publication Year: 2010
Publication Date: 2010-06-28
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 26
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