Numerical Study on Maneuverability of Submarine Influenced by Its External Carrying Vehicle
To investigate the maneuverability of a submarine influenced by its external carrying vehicle,the Reynolds-averaged Navier-Stokes method is applied to simulate captive motions of a SUBOFF submarine model carrying with an underwater vehicle.Based on the predicted hydrodynamic derivatives,the dynamic stability and the steerability of the submarine under the influence of the external vehicle are evaluated.The mesh convergence analysis of the simulation for the SUBOFF oblique motion was conducted,and the reliability of the numerical method was verified by comparing the numerical results with experimental data.Numerical simulations of captive motions in vertical and horizontal planes for the SUBOFF with the external vehicle are conducted,and the hydrodynamic derivatives are determined by curve fitting.Based on the predicted hydrodynamic derivatives,the dynamic stability and steerability of the submarine are evaluated using the corresponding maneuverability criterion indices.The results indicate that in both cases without and with an external carrying vehicle,the SUBOFF lacks dynamic stability,while the external vehicle will further reduce its stability.However,the external carrying vehicle can improve the course-changing ability of the submarine in the vertical plane and the turning ability in the horizontal plane.
submarine maneuverabilityexternal carrying vehiclecaptive model motionhydrodynamic derivativenumerical simulation
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