近水面椭球体非线性兴波的数值模拟(英文)

Numerical Simulation of the Nonlinear Waves Generated by a Submerged Ellipsoid

本文开发了一种去奇异面元法用于计算以定常前进速度运动的近水面椭球体引起的三维非线性自由面势流。采用求解非线性深水波的Stokes理论求解该定常非线性问题;物面用NURBS(非均匀有理B样条)表达;孤立的Rankine源分布在物体内部和自由面上方。给出了波型、波阻以及收敛特性随一些参数的变化规律。波阻计算结果和他人的其它数值结果进行了比较,其吻合程度令人满意。

A desingularized panel method was developed for calculating the three-dimensional nonlinear potential flow about a submerged ellipsoid moving at constant forward speed. The steady nonlinear problem is solved by the Stokes theory for nonlinear deep-water wave. The ellipsoid contour is described by NURBS (Non-Uniform Rational B-Spline). The isolated Rankine sources are distributed inside the body or above the free surface. Various numerical results including the wave pattern and wave resistance,as well as the convergence properties due to a few parameters are presented. The wave resistance results by the present method show excellent agreement with other published computational results.