An investigation of the dependence of the lift-induced drag coefficient C Di of a square-tipped, cambered wing model on Reynolds number for Re ≤ 1 × 106 was conducted. Computed based on the vorticity distribution inferred from the near-field cross-flow velocity measurements of the tip vortex, different C Di prediction schemes were used. The effect of measurement plane size and grid resolution on the C Di calculations was also identified. The C Di estimated by the integral method was found to increase with increasing Re and was below the C Di = C l 2 /πeAR prediction. Limits on the measurement plane size and grid resolution were determined to be at least 40% larger than the vortex outside diameter and no larger than 0.63% chord, respectively, in order to provide a good estimate of the induced drag.
Experiments in Fluids – Springer Journals
Published: Dec 24, 2006
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