It has evident effect of energy saving on the use of air cooling fan with poor rectifying condition & small hub ratio.

它用于整流条件差且轮毂比小的空冷风机上有明显的节能效果。

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Additionally, the larger the circumferential velocity component of hub leakage flow, the greater the deleterious effect of hub leakage upon the rotor flow.

另外，叶根泄漏流的周向速度分量越大，泄漏流对转子流场的不利影响也越大。

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In this paper, dynamics and control of a flexible hub-beam system are investigated with considering the effect of damping.

对考虑阻尼影响的中心刚体-柔性梁系统的动力特性和主动控制进行研究。

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By deploying so many large, economical aircraft from a vast base, open around the clock and halfway between Europe and Asia, Emirates could in effect run a global hub, reducing European airports to a feeder role and impoverishing their associated flag carriers.

ECONOMIST: Aviation