Numerical Investigation of Effect of Arrangement of Generators on Flow over a Suboff Submrine Model

Abstract

The vortex generated around a submarine has an important influence on the uniformity of the submarine wake at the propeller and hydrodynamic noise. A suitable way to reduce the effects of this separated flow is to use vortex generators. Vortex generators have different arrangement such as counter-rotating and co-rotating. The main goal of the present study is to investigate the flow field around a standard underwater model employing the vortex generator with different arrangement by using the CFD method (OpenFOAM code) in 0°≤α≤30° angles of attack. In this study, the application of CFD simulation which can help us to precisely study the structure of vortical flow field. The results show that counter-rotating vortex generators placed along the submarine do indeed significantly reduce strength of the vortex, line separation, size of cross-flow vortices and drag force. The amount of the drag reduction for the counter-rotating vortex generator is approximately 14% in α=30° and approximately 21% in β=30°.

Keywords

• َarrangement of vortex generator
• counter-rotating
• co-rotating
• openfoam.