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http://dx.doi.org/10.5139/JKSAS.2002.30.5.109

Visualization Study of High-Incidence Vortical Flow over the LEX/Delta Wing Configuration with Sideslip  

Sohn, Myong-Hwan (공군사관학교 항공우주공학과)
Lee, Ki-Young (공군사관학교 기계공학과)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.30, no.5, 2002 , pp. 109-117 More about this Journal
Abstract
An off-surface flow visualization experiments have been performed to investigate the flow field over a delta wing with the leading edge extension(LEX). The model is a flat wing with $65^{\circ}$ sweepback angle. The free stream velocity is 6.2 m/s, which corresponds to Reynolds number of $4.4\times10^5$ based on the wing root chord. The angle of attack and sideslip angle range from $16^{\circ}\sim28^{\circ}$ and $0^{\circ}\sim-15^{\circ}$, respectively. The visualization technique of using the micro water-droplet and the laser beam sheet enabled to observe the vortical flow structures, which can not be obtained by 5-hole probe measurements. With sideslip angle, the interaction and breakdown of the LEX and wing vortices was promoted in the windward side, whereas, it was suppressed in the leeward side.
Keywords
Leading Edge Extension(LEX); Delta Wing; Vortex Flow; Vortex Breakdown; Sideslip Angle;
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