中文摘要：

运用自适应多重网格法和内置边条法研究了俯仰震荡翼型的运动.通过研究翼型的原地摆动与自由游动,提出了一种确定自主推进俯仰震荡翼型推力的方法,得到了推力系数、功率系数和推进效率与Strouhal数的关系.与以往研究不同的是,我们还得到了Strouhal数随雷诺数的变化规律.此外,从自由游动翼型诱导出的涡量场中可以清楚的观察到旋涡的合并,这与实验研究非常吻合.

英文摘要：

A self-propelled oscillating foil is investigated.The 2D incompressible Navier-Stokes equations are solved by multigrid method with adaptive mesh refinement,and the moving boundary is handled with the immersed boundary method.To get the thrust of a self-propelled oscillating foil,a new method is raised,by which the thrust and the self-propelled speed are obtained by investigating the tethered oscillating foil and the self-propelled oscillating foil,respectively.Then,the Strouhal number,the thrust coefficien...