【摘要】 在静态结构网格的基础上,根据流场边界的运动提出了一种新的结构网格变形技术。通过影响函数的作用,将运动边界的信息向周围的网格传递,流场中的网格节点通过影响函数获取移动变形信息,构建出新的网格。相对于弹性网格变形方法,影响函数控制方法具有更强的网格变形能力和更好的网格质量。该方法能够满足生成贴体的粘性动网格,适用于Navier-Stokes方程。耦合Navier-Stokes方程与强迫运动方程,数值模拟了NACA0012翼型做强迫俯仰振荡(AGARD-CT1)的粘性动态流场。计算结果与试验值的对比,表明了该方法的有效性。更多还原

【Abstract】 The introduction of the full paper discusses relevant matters and then proposes what we relieve to be a useful method mentioned in the title.Sections 1 and 2 explain our method;their core consists of: "Based on static-state structured grid of the CFD,a new technology of dynamic structured grid generation is proposed.Through the influence functions,the displacement and deformer of the flow-field boundary are spread to ambient flow-field.The node of the grid can obtain the displacement through the influence functions and a new grid is built.Compared with the spring analogy,influence functions can give a better quality of the grid and is suitable to large boundary displacement and deformed boundary.This technology is especially suitable to generating the body fitted dynamic structured grid and to meeting the Navier Stokes equations requirement." Coupling Navier Stokes equations with constrained oscillatory motion equation,this paper numerically simulates the unsteady flow-field of the pitching motion of the NACA0012 airfoil.The numerical simulation results,presented in Figs.8,9 and 10,are in good agreement with the wind tunnel test results(AGARD-CT1),thus verifying the usefulness of our method of the dynamic structured grid generation technology.更多还原