A technique for exact determination of the parietal pressure in a flow
Abstract
The effect of the velocity gradient in the boundary layer on the measurements taken with a pressure tube were examined in a wind tunnel using two coaxial cylinders. The flow moved between the cylinders, which were instrumented internally with orifices of varying diameters. The external cylinder was maintained in rotation at a constant speed, thus forming the edge of the boundary layer for the interior cylinder. Error correction procedures defined by Ducruet (1983) were extended to account for the curvilinear walls. The accuracy of the new formulation was tested in the cases of a flow around a cylinder and one around an airfoil. Good agreement was obtained, noting that the calculations depended on knowing the wall curvature, the pressure, the velocity gradient, and the gradient thickness.
- Publication:
-
Academie des Sciences Paris Comptes Rendus Serie Sciences Mathematiques
- Pub Date:
- February 1983
- Bibcode:
- 1983CRASM.296..309D
- Keywords:
-
- Boundary Layer Flow;
- Flow Measurement;
- Pressure Measurement;
- Wall Pressure;
- Correction;
- Curvature;
- Incompressible Fluids;
- Wind Tunnel Tests;
- Fluid Mechanics and Heat Transfer