Hydrodynamic performance of a submerged lifting surface operating at high speed

4th High Performance Yacht Design Conference, 11-12 March 2012, Auckland, New Zealand.

The hydrodynamics of a submerged lifting surface are investigated by studying two canonical problems using Navier-Stokes based CFD simulations; (i) flow past a three-dimensional lifting surface having an elliptic planform and constant cambered foil section and (ii) flow past a two-dimensional symmetric foil section. Dependence of the resulting hydrodynamic loads on variations in speed and angle of attack are considered under fully wetted conditions as well as conditions allowing for cavitation.

Comparisons between results obtained from numerical simulations and those from experimental measurements, taken in a pressurized water tunnel facility, are presented.

INTRODUCTION

Understanding hydrodynamic performance of lifting surfaces at speeds where cavitation inception may be possible is of interest in design applications involving control surfaces for high speed marine vehicles. In this paper, we present results from a numerical investigation of two canonical problems, one involving a three-dimensional lifting surface, the second, a twodimensional foil, operating under flow conditions where cavitation is likely.

The scope of numerical simulation research that has been carried out in the field of high speed flows involving lifting bodies and cavitation is substantial and covers a broad scope of topics [2, 3]. The objective of the numerical study being presented in this paper was to perform an assessment of the cavitation modelling capability in the FineMarine hydrodynamic solver [4, 5] as applied to flows involving partially-cavitating lifting surfaces. Specifically, solution dependence on cavitation model type is of interest.

To read the full paper, please click here.

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