Lift on stationary and rotating spheres under varying flow and surface conditions
Lift on stationary and rotating spheres under varying flow and surface conditions
- New search for: Barlow, Jewel B.
- New search for: Domanski, Michael J.
- New search for: Barlow, Jewel B.
- New search for: Domanski, Michael J.
The authors examined the coefficient of lift for rotating and nonrotating spheres of varying surface texture under a variety of flight conditions. At Reynolds number less than 500,000 the direction of lift on a nonrotating polished sphere in a uniform flowfield is nonzero and in a direction that varies randomly with Reynolds number. However, once established, the direction and magnitude oflift appears to be stable over time at a particular Reynolds number. This phenomenon has not been reported previously. Additionally, the texture of a rotating sphere in a uniform flow can modulate direction and magnitude of lift generated by the spin. Although the expected direction ofthe net force on a spinning sphere is in a direction from the advancing to retreating surface ('Magnus effect'), in certain flight regimes the net force is in the opposite direction ('negative Magnus effect'). In this paper the authors present the first systematic windtunnel characterization of the flow parameters generating a negative Magnus effect on a sphere.
Document information
Lift on stationary and rotating spheres under varying flow and surface conditions
Hubkraft an stationären und rotierenden Kugeln unter variierenden Strömungs- und Oberflächenbedingungen
AIAA Journal ; 46 , 8 ; 1932-1936
2008
5 Seiten, 6 Bilder, 1 Tabelle, 12 Quellen
Article (Journal)
English
Similar titles
Lift on Stationary and Rotating Spheres Under Varying Flow and Surface Conditions
| Online Contents | 2008