弹簧近似法在二维非结构动网格生成技术中的应用

Spring analogy method for generating of 2D unstructured dynamic meshes

通过控制网格质量改进弹簧近似法,并将其结果与传统方法进行比较。数值模拟结果显示:基于弹簧近似法的非结构动网格随着模型边界旋转角度的增加网格质量逐渐下降;在发生相同旋转角度时,改进弹簧近似法生成网格的质量较传统方法有了较大的改善;传统弹簧近似法模型边界最大旋转角度为13°左右,改进方法可达到27°,较大地提高了网格的变形能力。最后,运用改进的弹簧近似法对二维翼型进行数值模拟,并与传统方法及实验数据进行比较,得到了较满意的结果,该方法能够较好地运用于实际数值模拟中。

Spring analogy method（SAM） was improved through controlling mesh quality here.Then,its results were compared with those obtained through the traditional SAM.It was shown from numerical simulations that mesh quality declines with increase in rotation angle in the unstructured dynamic meshes based on SAM;the quality of the mesh generated with the improved SAM is better than that generated with the traditional SAM for the same rotation angles;mesh deformation capability of the improved SAM is larger than that of the traditional SAM;the max rotation angle of the model boundary is about 13° with the traditional SAM and 27° with the improved SAM.Finally,numerical simulations of a two-dimensional airfoil using the improved SAM were conducted.It was found that the results of the improved SAM show a better agreement with the experiment ones;the improved SAM can be used in real numerical simulations effectively.