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Indexed by:期刊论文

Date of Publication:2013-10-01

Journal:APPLIED OCEAN RESEARCH

Included Journals:SCIE、EI、Scopus

Volume:43

Page Number:88-98

ISSN No.:0141-1187

Key Words:Unsteady; Wing-in-ground effect; Nonlinear lifting surface theory; Water waves; Green's function

Abstract:The present article presents a nonlinear analysis for determining the three-dimensional unsteady potential-flow characteristics about a wing subject to wing-in-ground effect (WIG) operating above progressive water waves. By means of the time-domain Green's function for the three-dimensional dipole moving above the free surface satisfying the dynamic and kinematic boundary conditions on the mean free surface, the influence of the free surface on the vortex ring is considered. Then, the nonlinear unsteady lifting surface theory is developed to study the lifting problem for a three-dimensional wing operating above progressive water waves. Furthermore, the roll-up shed from the wing in the presence of a free surface and water waves is taken into account. With the computed results, the two-dimensional force coefficients (including the lift coefficient, induced drag coefficient and lift-to-drag ratio) are presented with the variation of different geometry and water wave parameters. The data reported in the literature care presented to validate the present approach. Crown (C) 2013 Published by Elsevier Ltd. All rights reserved.