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。
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 dis- placement 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.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2011年第6期887-891,共5页
Journal of Northwestern Polytechnical University
基金
国防基础科研项目(A2720060290)资助
关键词
结构动网格
影响函数
移动边界
变形
Navier—Stokes方程
airfoils, algorithms, analysis, computational fluid dynamics, computational geometry, control, experi-ments, functions, models, Navier Stokes equations, numerical methods, simulation, unsteady flow,vibrations （mechanical）, wind tunnels
deformer, dynamic structured grid, influence function, mov-ing boundary
