计算结果表明，旋转桨叶对直升机机载天线辐射场产生了显著的影响。
The computed results show that the antenna radiation field is interfered severely by the rotating blades.
一个技术难题是气穴现象，一旦发生气穴现象，位于旋转螺旋桨叶后方的低压会产生气泡。
One technical difficulty is cavitation, where low pressure behind a turning blade causes air bubbles.
当船在航行时，被迫通过管道的水旋转一个小型水轮发电机的桨叶，发电机给一组锂离子电池充电。
When the boat is under sail, water forced through the duct turns the blades of a small hydroelectric generator that charges a bank of lithium-ion batteries.
虽然与直升机外观相似，但自转旋翼机必须依靠向上流过桨叶地气流维持旋翼地旋转，产生将飞行器维持在空中地升力以及向前飞行地推力。
While similar to a helicopter rotor in appearance, the autogyro's rotor must have air flowing up and through the rotor disk in order to generate rotation.
当它在水中或空气中旋转时就对桨叶产生推力，然后推动交通工具前进。
By its rotation in water or air, the propeller produces thrust on the Blades, which gives forward motion to the vehicle.
旋翼阻抗由旋翼在固定坐标系中的运动方程得到，这个运动方程由旋翼旋转坐标系中的桨叶模态方程导出。
The rotor impedance is calculated from the rotor equations of motion in the fixed- coordinate system derived from the modal equations of blade in the rotating-coordinate system.
为考虑风力发电机组桨叶旋转效应，准确确定作用在桨叶风荷载，研究基于旋转样本谱进行风场模拟的问题。
In order to consider the rotational effect of blades and determine the exact loads of the wind turbine system, wind field simulation based on the rotationally sampled spectrum was studied.
本文用有限元法分析了柯氏力对桨叶旋转面固有振动频率的影响。
The influence of coriolis force on the natural frequencies of the rotor blades is analysed by the finite element method.
假设桨叶以高速旋转进入、离开水面，叶背充满空泡，随边后空泡腔延伸到水面。
It is assumed that the blade of the partially submerged ventilated propeler enters and exits from water at high speed.
旋翼阻抗由旋翼在固定价值标系中的运动方程得到，这个运动方程由旋翼旋转坐标系中的桨叶模态方程导出。
The rotor impedance is calculated from the rotor equations of motion in the fixed-coordinate system derived from the modal equations of blade in the rotating-coordinate system.
本发明利用偏心同步旋转的两个转轮带动桨叶运动来提高船舶的推进效率，结构简单，且能使船在浅水航道中行驶。
It USES the two eccentric synchronous rotating runners to drive the paddle to enhance ship thrusting efficiency, has simple structure and can make the ship run on a shallow waterway.
在随桨叶旋转的坐标系中，建立了悬停旋翼自由尾迹计算的迭代方法和模型。
A computational method based on rotor free-wake is developed for predictig flow field between the twin rotors of coaxial helicopters.
在随桨叶旋转的坐标系中，建立了悬停旋翼自由尾迹计算的迭代方法和模型。
A computational method based on rotor free-wake is developed for predictig flow field between the twin rotors of coaxial helicopters.
应用推荐