曲线坐标下单位矢量偏导数的计算

在叶片式流体机械的内流场计算中，要使用曲线坐标系的三个正交单位矢量关于曲线坐标的偏导数，本文导出了计算这些偏导数的一种新方法，这一方法思想清晰，避免了繁难的理论分析，易于为技术人员接受与掌握。

Ventilation and selection of exhaust fan in the basement

In calculation of inner flew field within turbomachinery, partial differentials of three unit vectors in a curvilinear orthogonal coordinates must be employed. This paper presented a new simple way to computer these partial differentials in which complex theoretical analyses are avoided and the new methodology is easy for engineers to learn and understand.