Aerodynamic forces acting on a rough rotating cylinder in a cross-flow
Abstract
The forces are investigated experimentally for two values of the degree of turbulence. The experiments are carried out in a low-turbulence, subsonic wind tunnel; the Reynolds number varies between 100,000 and 600,000, and the rotation parameter, between 0 and 1 radian. The apparatus permits the registration of instantaneous forces with relatively high precision. The desired roughness is produced by covering the surface of the cylinder with emery paper. The magnitude and type of changes in the aerodynamic forces for the case of a rough cylinder are found to differ in a fundamental way from that of a smooth cylinder, a difference related to features of the flow near the wall and to the position of the separation points of the boundary layer. Increasing the degree of turbulence of the flow does not noticeably affect the aerodynamic forces of a rough cylinder in the supercritical region of Reynolds numbers.
- Publication:
-
Akademiia Nauk SSSR Sibirskoe Otdelenie Izvestiia Seriia Tekhnicheskie Nauki
- Pub Date:
- June 1981
- Bibcode:
- 1981SiSSR.......32B
- Keywords:
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- Aerodynamic Forces;
- Cross Flow;
- Rotating Cylinders;
- Rotating Fluids;
- Surface Roughness Effects;
- Turbulent Flow;
- Aerodynamic Drag;
- Boundary Layer Separation;
- Circular Cylinders;
- Flow Velocity;
- Lift;
- Reynolds Number;
- Subsonic Wind Tunnels;
- Velocity Distribution;
- Wall Flow;
- Wind Tunnel Tests;
- Fluid Mechanics and Heat Transfer