The control of the tip vortex, generated by a rectangular NACA 0012 wing, via tip-mounted half-delta wings (HDWs), of different slendernesses Λ, root chords cr, and deflections δ, was investigated experimentally at Re = 2.45 × 105. The results show that regardless of Λ, cr, and δ, the addition of HDWs consistently led to a diffused tip vortex. The degree of diffusion was, however, found to increase with decreasing Λ and cr. HDWs with cr ≤ 50% of the baseline-wing chord c caused a rapid diffusion of vorticity and rendered a weak circulation flowlike tip vortex, suggesting an enhanced wake-vortex decay and alleviation. The cr = 0.5c HDW also produced an improved lift-to-drag ratio. A unique double-vortex pattern also exhibited downstream of the cr ≤ 50%c HDW wings. The interaction and merging of the double vortex were expedited by upward HDW deflection.
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December 2015
Research-Article
Wingtip Vortex Control Via Tip-Mounted Half-Delta Wings of Different Geometric Configurations
T. Lee
Department of Mechanical Engineering,
McGill University,
Montreal, QC H3A 0G4, Canada
McGill University,
Montreal, QC H3A 0G4, Canada
S. Choi
Department of Mechanical Engineering,
McGill University,
Montreal, QC H3A 0G4, Canada
McGill University,
Montreal, QC H3A 0G4, Canada
1Corresponding author.
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received November 15, 2014; final manuscript received June 5, 2015; published online August 4, 2015. Assoc. Editor: Sharath S. Girimaji.
J. Fluids Eng. Dec 2015, 137(12): 121105
Published Online: August 4, 2015
Article history
Received:
November 15, 2014
Revision Received:
June 5, 2015
Citation
Lee, T., and Choi, S. (August 4, 2015). "Wingtip Vortex Control Via Tip-Mounted Half-Delta Wings of Different Geometric Configurations." ASME. J. Fluids Eng. December 2015; 137(12): 121105. https://doi.org/10.1115/1.4030852
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