极涡是该区域四季存在、冬强夏弱、向上延伸至平流层下部的基本环流系统。

Polar vortex is a basic circulation system which exists in every season (strong in winter and weak in summer) and can extend to the lower level of stratosphere.

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该方法适用于具有强旋转流动涡量的测量。

The method is applicable for measuring vorticity of a strong rotational flow.

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基于多重线涡模型（MLVM），本文建立了一种计算机时少、收敛性强的适用于大迎角涡流势流数值模拟的迭代算法。

A robust iterative method suitable for the numerical simulation of vortex flows at high angles-of-attack is established based upon the multiple line-vortex model (MLVM).

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