Effect of apex strake incidence-angle on the vortex development and interaction of a double-delta wing
- Title
- Effect of apex strake incidence-angle on the vortex development and interaction of a double-delta wing
- Authors
- Sohn, Myong Hwan; null
- Date Issued
- 2010-04
- Publisher
- SPRINGER
- Abstract
- The vortex flow characteristics of a sharp-edged delta wing with an apex strake was investigated through the visualization and particle image velocimetry (PIV) measurement of the wing-leeward flow region, and the wing-surface pressure measurement. The wing model was a flat-plate, and 65A degrees-sweep cropped-delta wing with sharp leading edges. The apex strake was also a flat-plate wing with a cropped-delta shape of 65A degrees/90A degrees sweep, and it can change its incidence angle. The flow Reynolds number was 2.2 x 10(5) for the flow visualization and 8.2 x 10(5) for the PIV and wing-surface pressure measurements. The physics of the vortex flow in the wing-leeward flow region and the suction-pressure distribution on the wing upper-surface were interrelated and analyzed. The effect of a positive (negative) strake incidence-angle was the upward movement of the strake and wing vortices away from (downward movement of the strake and wing vortices toward) the wing-upper surface and the delayed (enhanced) coiling interaction between them. This change of vortex flow characteristics projected directly on the suction pressure distribution on the wing upper-surface.
- Keywords
- FLOW-CONTROL; FLAP; VISUALIZATION; BREAKDOWN
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/25239
- DOI
- 10.1007/S00348-009-0644-3
- ISSN
- 0723-4864
- Article Type
- Conference
- Files in This Item:
- There are no files associated with this item.
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