On the drag reconfiguration of plates near the free surface

摘要: Rectangular foils of different flexural rigidities were towed normal to the flow at a fixed speed in quiescent fluid order study effect proximity upper edge models free surface. It was found that flexibility ensured drag reduction due reconfiguration process all submergence depths, with certain exhibiting depth-independent behavior. The Vogel exponents also showed sublinear or even depth independent relationship between and velocity can be attained specific rigidity values. A modified classical beam theory model using power-law based load distribution utilized obtain an empirical loading exponent Cauchy numbers identify foil tip location. Particle image velocimetry undertaken interpret further understand force results. experiments existence 2 ranges small degree overlap wherein coefficient are depth.Rectangular coefficien...