利用截面数据显示三维涡结构的新方法

 比较了几种利用截面数据显示流动结构的方法。对截面流线不能正确显示三维涡结构的原因作了分析。在此基础上, 用Lamb 矢量和观察截面的法矢量的矢量积定义了截面旋矢量。将截面旋矢量应用于流场数据显示得到了较好的效果。这种方法所显示的是Lamb 曲面与观察截面的交线, 不会因观察截面的方向不当而歪曲流场结构。

A New Method for Visualizing 3-D Vortices Structures Using Sectional Data

Several methods for visualizing the flow structures by using sectional data were compared and analyzed to find the reason why sectional streamlines cannot describe vortices structures correctly. Consequently, a new concept of sectional spin vector defined by the vector product of Lamb vectos and normal vector of the section is proposed. Comparing with other methods, the visualized structures of flow field described by the spin vector is more correct because the sectional cross-lines of the Lamb surface and the observational plane as described by the suggested method do not distort the visualized flow phenomena even the observational plane is not properly chosen.