引入尾流收缩比因子，并将大速度时的涵道等效为圆形机翼，建立了一个适合于直升机悬停和前飞状态涵道尾桨气动特性分析的动量理论方法。

The shroud at high speed is modeled as an elliptic wing in order to construct a momentum theory method to investigate the aerodynamic characteristics of ducted tail rotor in hover and forward flight.

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例如为全部的机群配置圆形的机翼。

For example, it outfitted its whole fleet with rounded winglets.

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计算模型包括尖前缘、菱形前缘、圆形前缘等三种不同前缘形状的机翼。

Numerical investigation of the effects of different leading-edge profiles on vortical flows over a double-delta wing;

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