Abstract
The work is devoted to 3D and 2D parallel numerical computation of pressure and velocity fields around an elastically supported airfoil self-oscillating due to interaction with the airflow. Numerical solution is computed in the OpenFOAM package, an open-source software package based on finite volume method. Movement of airfoil is described by translation and rotation, identified from experimental data. A new boundary condition for the 2DOF motion of the airfoil was implemented. The results of numerical simulations (velocity) are compared with data measured in a wind tunnel, where a physical model of NACA0015 airfoil was mounted and tuned to exhibit the flutter instability. The experimental results were obtained previously in the Institute of Thermomechanics by interferographic measurements in a subsonic wind tunnel in Nový Knin.
Highlights
The interaction of elastic structure and fluids appears frequently in fields such as aerospace engineering, biomechanics or turbine design
Values of numerical solutions are shown in graphs, where on the x-axis is plotted position normalized to the chord length and on the y-axis the velocity
Velocity in the numerical simulation is evaluated in the nodes of mesh, which are located two cells from the surface of the wing
Summary
The interaction of elastic structure and fluids appears frequently in fields such as aerospace engineering, biomechanics or turbine design. Poirel et al [6] studied the low amplitude self-sustained pitch airfoil oscillations in incompressible flow by 2D numerical simulations for Reynolds numbers between 50,000 and 150,000. Both laminar and unsteady RANS calculations using the SST k–omega model with a low-Reynoldsnumber correction have been performed and found to produce reasonably accurate limit cycle pitching. The velocity is evaluated from interferograms [8]
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