Abstract:

In this paper the flow field around a submarine has been investigated. Pressure distribution and its impact on submarine  hull form have been studied. The accurate and efficient prediction of hydrodynamic pressure and forces on a submarine has been achieved by investigating the flow related to the interaction of the vertical flow shed from the sail and the cross-flow boundary layer of the hull. Therefore this study aims to simulate the flow field of a submarine by using finite volume method. Finite Volume Stress Analysis Method and k-ω turbulence model have been used to simulate turbulent flow past the submarine hull surface.  A submarine hull with overall length of 80 meters and diameter of 10 meters was chosen. It has aft body length 11m and sail length 7m. The speed range of the submarine is 0 to 30 knots with 5 knots increments. Calculated pressure coefficients along the submarine hull are discussed to show the effect of the sail lateral position and the stern appendages. It is also discussed a Reynolds Averaged Navier-Stokes (RANS) code application in the design of an "Advanced Sail" for a submarine.

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