In this paper, submarine models with various rudder profiles are studied and commercial CFD software STAR-CCM+, based on RANS simulations, is carried out to numerically simulate self-propulsion maneuvering motions of the underwater vehicles with different appendages. Finite volume method based on incompressible solver with SST k-ω turbulence model and unstructured grid are applied to study the flow field characteristics. The self-propulsion horizontal turning movement of the SUBOFF models equipped with various rudder profiles are simulated directly to analyze the motion characteristics in each simulation; finally, the impacts of rudder profiles on UV maneuverability are discussed and concluded.

INTRODUCTION

The maneuverability of the underwater vehicles (UVs) is one of the most important performance in UVs research, and accurately predicting its motion characteristics in maneuvering motion is very necessary for the safety and design. The evaluation of the maneuverability of UVs is traditionally solved by simplified System-Based Models, based on captive model tests or Computational Fluid Dynamics method. Lin (2018) established the Planar Motion Mechanism (PMM) experiments in the towing tank to analyze maneuvering derivatives of a half-scale submerged body DARPA SUBOFF and evaluate the maneuvering derivatives by a Fourier transform. Pan (2012) adopted steady and unsteady RANS simulations and dynamic mesh method to numerically simulate the oblique towing experiment and the PMM experiment performed on the SUBOFF submarine model. Wu (2015) established a hybrid reference frames method that combined the rotating reference frame method and an added momentum source method to investigate the influences of the rotating arm radius and linear velocity in the numerical simulations.

With the large progress of the computer technique, people pay more attention to the simulation of the self-propelled test. G. Dubbioso (2017) presented and discussed the results of the free running maneuvering simulations of a fully appended submarine with two different configurations of the stern appendages. Feng (2018) used the volume force method to realize the self-propelled movement of submarine and obtained the trajectory and kinematic parameters. K. Petterson (2018) reported additional simulations of the self-propulsion conditions at ±10 yaw by LES method.

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