Calculation of boundary layers of oscillating airfoils
Abstract
A two-point finite difference unsteady laminar and turbulent boundary layer computational method was used to investigate the properties of the flow around an airfoil (NACA 0012) oscillating through angles of attack up to 18 degrees, for reduced frequencies of 0.01 and 0.20. The unsteady potential flow was determined using the unsteady potential flow method of Geissler. The influence of transition location on stal behavior was investigated, using both experimentally determined transition information, and transition located at the pressure peak; the results show the need for viscous-inviscid interaction in future computation of such flows.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- May 1984
- Bibcode:
- 1984STIN...8431554C
- Keywords:
-
- Aerodynamic Stalling;
- Airfoils;
- Boundary Value Problems;
- Flow Distribution;
- Turbulent Boundary Layer;
- Angle Of Attack;
- Finite Difference Theory;
- Oscillations;
- Transformations (Mathematics);
- Viscosity;
- Vortices;
- Fluid Mechanics and Heat Transfer