The position of power axis of flow is determined by main channel when runoff is small, while the change law conforms with the law of rectangular section when runoff is large.

当小流量时水流动力轴线的位置取决于主槽的位置，当大流量时水流动力轴线的变化规律接近矩形断面的情形。

youdao

The paper proposes a new method of using the ultrasonic-speed turbine as a power sourse and using the magnetic suspension bearing as the main back-up bearing for the rotation axis.

本文提出用永磁材料制作的永磁悬浮轴承作高速旋转轴的主要支承，轴流式超音涡转作回转轴的驱动动力源。

youdao

The main objective of this paper is to investigate the horizontal-axis wind turbine (HAWT) rotors, which are optimized to produce the largest possible power output.

为保证风力机具有最大的风能利用系数，本文主要对水平轴风力机风轮的设计和优化方法进行了研究。

youdao