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Vortical Flows over a LEX-Delta Wing at High Angles of Attack  

Lee, Young-Ki (School of Mechanical Engineering, Andong National University)
Kim, Heuy-Dong (School of Mechanical Engineering, Andong National University)
Publication Information
Journal of Mechanical Science and Technology / v.18, no.12, 2004 , pp. 2273-2283 More about this Journal
Abstract
The vortical flows over sharp-edged delta wings with and without a leading edge extension have been investigated using a computational method. Three-dimensional compressible Reynolds-averaged Navier-Stokes equations are solved to provide an understanding of the effects of the angle of attack and the angle of yaw on the development and interaction of vortices and the aerodynamic characteristics of the delta wing at a freestream velocity of 20 m/s. The present computations provide qualitatively reasonable predictions of vortical flow characteristics, compared with past wind tunnel measurements. In the presence of a leading edge extension, a significant change in the suction pressure peak in the chordwise direction is much reduced at a given angle of attack. The leading edge extension can also stabilize the wing vortex on the windward side at angles of yaw, which dominates the vortical flows over yawed delta wings.
Keywords
Angle of Attack; Angle of Yaw; Delta Wing; Leading Edge Extension; Vortical Flow; Vortex Breakdown;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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