Numerical simulation of the vortex-fin interaction over a tangent-ogive cylinder

Abstract

AbstractThe interaction between slender body vortices and a single vertical fin located down the axis of the body is investigated numerically for angle of attack of 30 deg and Reynolds number of 6000. The present research includes a parametric study on the effect of fin location and fin azimuthal position. A numerical method based on the pseudo-compressibility is used for solving the three-dimensional incompressible Navier-Stokes equations using the Lower-Upper Symmetric Gauss-Seidel implicit scheme. The numerical results show that the vortices remain very coherent and attached to the body until they reach the fin section, where they become less coherent and begin to separate from the body. Also, the results show that the fin location does not affect the upstream development of the vortices, but it does affect the location at which the vortices separate from the body. The effect of azimuthal fin positions was also investigated. As the azimuthal angle of the fin increased, the size of the vortex on the port side decreased, but the starboard side vortex grew in size and moved across the leeward ray to the port side. The computed results are found to agree well with the available experimental data. The effect of the grid size on the numerical solutions was also investigated.