嵌补式网格技术在三维增升装置绕流数值模拟中的应用

Application of embedding grid technology in numerical simulation about 3-D lift-enhancing device

基于Jameson的有限体积方法,采用多块网格技术求解Reynolds平均N-S方程组,对三维增升装置绕流进行数值模拟。提出了新颖的嵌补式多块网格技术,使得网格生成和流场计算得到了明显的简化。计算结果与实验数据吻合良好。

There are great difficulties in numerical simulation of flow about 3D liften hancing device , both in grid generation and flow field solving. This paper pres ents a novel MultiBlock Grid Technology-the so called Embedding Grid Technolo gy, which provides a simple way to solve this problem. In this method, the ideas of Chimra grid and Patch grid are combined. The grids of components, such as fl aps and slats, are embedded in assigned windows of main wing grid. The grid gene ration and programming of flow solver are both dramatically simplified.The conse rvative information exchanges are executed on boundaries of windows, which are c ommon interfaces of component and main grids. As a validation, flow field about a wing with a half span flap is computed with the present method. Results ar e in good agreement with experiment data. Much fewer grid blocks, with the prese nt method than with traditional Patched Grid Technology, are demanded. 