Abstract
This paper describes the investigations on the aerodynamic characteristics of a U-shaped and V-shaped wing in ground effect. The lift, drag, side force, and rolling moment were measured in a low turbulance wind tunnel, using a 6-component balance. The flow over the upper surface was visualized by the tuft method. The results obtained were as follows: The U-shaped and V-shaped wing had an almost equivalent lift-to-drag ratio compared to a planar wing. This was due to the dihedral angle of U-shaped and V-shaped wing, resulting in a decrease of the induced drag. While separation only occurred on the V-shaped wing at an attack angle of 6 degree, a higher lift-to-drag ratio of the U-shaped wing was obtaind at attack angle of 4 and 6 degree. With both wings, an almost equal restoring force and an even higher restoring moment were obtained than with a conventional boxshaped wing. Thus, the U-shaped and V-shaped wing offer a more suitable wing configuration for the Aero-Train than a conventional wing does.
Original language | English |
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Pages (from-to) | 1228-1235 |
Number of pages | 8 |
Journal | Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B |
Volume | 72 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2006 |
Keywords
- Aero-Train
- Flow Visualization
- Fluid Force
- Lift-to-Drag Ratio
- Separation
- U-shaped Wing
- V-shaped Wing
- Wing in Ground Effect
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanical Engineering