1、

In this paper an experimental investigation was carried out, and it is proved: no matter whether tip vortex cavitation is visible, narrow band noise peak is connected with the flow near the tip of propeller.

本文用实验证实这种窄带噪声峰与桨叶梢部流动有关,无论梢涡空泡可见与否,都可能出现。

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2、

The spiral cloud and rain band of typhoon, whose origination and maintain can be explained with the vortex Rossby-wave theory and can produce "local vortex Rossby-wave" through changing gradient distribution pattern of local relative vorticity along outward direction of typhoon.

台风螺旋云雨带的形成与维持,可以用涡旋Rossby波理论来解释:可以通过改变局地相对涡度径向梯度分布,从而沿台风径向激发出局地涡旋Rossby波。

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