Numerical Simulation on the Horseshoe Vortex Formation Around the Hull-Sail Junction of Submarine

Abstract

The horseshoe vortex is typical flow characteristic around the appendage-body junction. The horseshoe vortex formation around the hull-sail junction has important influence on the submarine hydrodynamics performance. The origination process of the submarine horseshoe vortex and its influence on submarine flow is analyzed. The numerical simulation on the submarine horseshoe vortex is carried out using DES method (Detached Eddies Simulation); the influence of model speed on submarine horseshoe vortex is studied. It is shown that the model speed has little influence on the position of the horseshoe vortex center, while has significant influence on the intensity of the horseshoe vortex. The attenuation of horseshoe vortex becomes slow with the increase of its spread distance.