By the approximate form of solution near the boundary, the flow variables at the exterior dependent points can be evaluated, and boundary conditions can also be imposed at the same time.

通过边界附近解的近似形式，外部相关点上的流动变量值得到确定并强加相应的边界条件。

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Through transformations, the time-dependent boundary conditions on the airfoil contour and the boundary conditions at infinity are brought fixed to the boundaries of a finite domain.

通过坐标变换使变化的物面边界条件及无穷远边界条件变为固定的有限范围内的边界条件。

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