Experimental modeling of a turbulent flow in the junction and wake of an appendage flat plate
Abstract
Experimental measurements were carried out in an incompressible three-dimensional turbulent shear layer in the corner near the trailing edge and also downstream of an appendage mounted perpendicular to a flat plate. The symmetrical appendage had an elliptical nose and was aligned with the flow. The thickness of the turbulent boundary layer as it approached the appendage leading edge was 76 mm or 1.07 times the maximum thickness of the appendage. The shear layer thickness was small compared with the appendage span. As the oncoming boundary layer passed around the appendage, a strong secondary flow was formed which was dominated by a horseshoe root vortex. This secondary flow had a major effect in redistributing both the mean flow and turbulence quantities throughout the shear layer, and this effect persisted to a significant degree up to at least three chord lengths downstream of the appendage leading edge. Static pressure gradients through the shear layer were small. The turbulent boundary layer formed on the appendage surface separated at the trailing edge and interacted with the secondary flow field downstream of the appendage.
- Publication:
-
AIAA, ASME, SIAM, and APS, National Fluid Dynamics Congress
- Pub Date:
- 1988
- Bibcode:
- 1988aiaa.conf.1255M
- Keywords:
-
- Flat Plates;
- Flow Measurement;
- Shear Layers;
- Three Dimensional Boundary Layer;
- Turbulent Boundary Layer;
- Turbulent Wakes;
- Incompressible Boundary Layer;
- Leading Edges;
- Secondary Flow;
- Trailing Edges;
- Fluid Mechanics and Heat Transfer