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Study on the Hydrodynamic Characteristics of a Trapezoid Wing at Low Reynolds Numbers
Pages: 94-100
Year: Issue:  6
Journal: Journal of Ocean Technology

Keyword:  trapezoidal winghydrodynamic performancethree-dimensional effectlow Reynolds number;
Abstract: At present, in the process of marine development, various types of submersibles with less water resistance for torpedo-type water use for marine monitoring, exploration, or other special operations are developing rapidly, and understanding related hydrodynamic problems is the basis for design. When the torpedo type submersible is in a low-speed environment, its hydrodynamic performance will have new features. Therefore,it is necessary to conduct a systematic and in-depth study on the problems caused by low Reynolds number. In this paper, the hydrodynamic performance of small sized the trapezoidal wings and the characteristics of the surrounding flow field are studied by numerical simulation. The trapezoidal wing adopts the airfoil of NACA4412.In the simulation, the velocity of undisturbed flow ranges from 0.5 m/s to 1.5 m/s, so that the Reynolds number based on the average chord length of the wing varies between 20,000 to 60,000. The attack angle of the wing varies from 0 to 21 degrees. The model is based on Navier-Stokes equation and k-SST turbulence model, and spacing discretization by finite element method. The flow patterns around the wing at different Reynolds number and different angle of attack are revealed by numerical simulations. The results of this paper can provide a reference for designing a submarine with less water resistance.
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