Research on Hydrodynamic Performance of UUV Operating Near the Underwater Vehicle under the Oblique Towing Condition
The hydrodynamic characteristics of UUV in the near field of underwater vehicles under oblique condition are of great significance for the study of UUV maneuvering performance.The paper focused on the fully attached SUBOFF and UUV models,and based on the RANS solver in STAR-CCM+,conducted a numerical prediction study of the hydrodynamic characteristics of UUV in the near field region of the SUBOFF model under horizontal oblique condition.The variation of lateral force and yaw moment of UUV at different positions with drift angle was analyzed.Then the least squares method was used for regression analysis to obtain various hydrodynamic coefficients of UUV at different positions and interpolant fitting function was used for interpolation to obtain the distribution cloud map of various hydrodynamic coefficients of UUV in the calculation area.The research results indicate that as the UUV approaches the bow and wall of the underwater vehicle,the change in its hydrodynamic coefficient mainly comes from the nonlinear term.
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