非结构粘性直角网格物面相贯线修正

Method for Unstructured Viscous Cartesian Grid

非结构粘性直角网格通过对内面进行光顺、投影及分层加密等方法,在内面与物面间生成了粘性层网格,解决了直角网格在计算粘性流场时遇到的难题。但在光顺和投影之后,物形可能发生改变,从而丧失了某些原来物体具有的特征,对流场计算产生影响。提出了物面相贯线修正方法,在投影之后对各投影点的位置进行修正,解决了物面变形的问题,并通过生成DLR-F4等复杂外形的网格,对此方法进行验证。

There are many difficulties for applying cartesian grid to viscous flow computation. The viscous grid that generated after smoothing the inner-face and projection could solve these problems, but the model could be changed after the treatment and the character of the model may be lost. The character-line modified method was developed, the position of projective points was modified so that the model would not be changed after the generation of viscous grid. The new method has been validated after applying to some complex configuration, such as DLR-F4.