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Abstract
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The wing-in-ground-effect craft is a new means for traveling on rivers, lakes, and at sea
between islands. In this study, the effect of boundary layers due to the ground viscous
effect on the aerodynamic coefficients of the compound wing of a WIG craft was
numerically investigated. The compound wing is divided into three parts, with one
rectangular wing in the middle and two reverse taper wings with an anhedral angle at
the sides. A realizable k-? turbulent model was used for modeling the flow around the
wing area. The computational results of the compound wing for fixed ground were
compared with the experimental data. The aerodynamic characteristics of the compound
wing were examined via both fixed and moving ground for removing the boundary
layers effect of the ground. Accordingly, the numerical result indicated that the lift and
drag coefficients and lift to drag ratio are affected by the ground boundary layers while
the moment coefficient and center of pressure of the compound wing showed little
variation with respect to ground boundary conditions.
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