Accounting for the effects of unsteady, separated boundary layers in transonic two dimensional calculations
Abstract
An unsteady, implicit calculation method for transonic, viscous, separated, two dimensional flow is presented. The perfect fluid is calculated by a method of small transonic perturbations. Boundary layers and wakes are calculated by an unsteady integral method from upstream to downstream, solved as a direct or inverse problem depending on whether the flow is attached or separated. Coupling is strong and is realized at each time step by a semi-implicit relaxation. The influence on pressure distributions of taking viscous effect into account is shown. It is shown that viscosity effects must be taken into account in three dimensional, transonic calculations.
- Publication:
-
Final Report Office National d'Etudes et de Recherches Aerospatiales
- Pub Date:
- October 1987
- Bibcode:
- 1987oner.reptR....G
- Keywords:
-
- Boundary Layer Separation;
- Computational Fluid Dynamics;
- Separated Flow;
- Transonic Flow;
- Two Dimensional Flow;
- Unsteady Flow;
- Pressure Distribution;
- Viscosity;
- Viscous Flow;
- Wakes;
- Fluid Mechanics and Heat Transfer