Study of a turbulent boundary layer modified by the insertion of a Large Eddy Break Up (LEBU) device
Abstract
Improving the understanding of the fundamental mechanisms acting in turbulent structures is discussed. An experimental study is performed and the data provided information on physical phenomena. A theoretical approach is carried out to complete the study. Based on the unsteady aerodynamic and rapid distortion theory, a model which takes into account the 'unwinding vortex' effect, is developed. This model is compared with data. The results show the efficiency of this theory. The comparison of the data with a k-epsilon model shows that the modification of a boundary layer by a thin plate is also a diffusion problem. The initial modeling is improved by including the intermittency effect.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- June 1992
- Bibcode:
- 1992PhDT........23A
- Keywords:
-
- Computational Fluid Dynamics;
- K-Epsilon Turbulence Model;
- Turbulent Boundary Layer;
- Velocity Distribution;
- Eddy Viscosity;
- Skin Friction;
- Thin Plates;
- Wall Flow;
- Wind Tunnel Tests;
- Fluid Mechanics and Heat Transfer