Lift-induced drag of a cambered wing for Re≤1×106

Lift-induced drag of a cambered wing for Re≤1×106 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Lift-induced drag of a cambered wing for Re≤1×106

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Publisher
Springer-Verlag
Copyright
Copyright © 2006 by Springer-Verlag
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-006-0242-6
Publisher site
See Article on Publisher Site

Abstract

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.

Journal

Experiments in FluidsSpringer Journals

Published: Dec 24, 2006

References

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