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.
螺旋桨叶由柴油发动机驱动。
螺桨毂盖，机头整流罩某些飞机上装于螺旋桨叶毂上的整流罩。
A fairing fitted over the hub of the propeller in some aircraft.
针对螺旋桨叶片数识别问题，建立了螺旋桨空化噪声信号模型。
In order to solve the problem of propelle blade-number recognition, the propelle radiated-noise model is built on the basis of five hypotheses.
通过正交试验研究了磨削参数对船用螺旋桨叶片表面粗糙度的影响。
The effects of grinding parameters on surface roughness of Marine propeller blade were studied by using orthogonal test.
利用螺旋的升力线模型和变分法原理对螺旋桨叶片环量分布进行了数值优化。
The optimum distribution of circulation on a marine propeller blade is numerically determined by using the lift_line vortex model and variational calculus.
麻烦的是，高海拔的地段，氧气稀薄，螺旋桨叶片没有空气使其扇动，而且发动机燃烧汽油也需要氧气。
The trouble was that at high altitudes where there is less oxygen, the propeller blades had little air to bite and engines still needed oxygen to burn petrol.
NTSB发现机组人员都已无法感知飞机的任何问题，直到螺旋桨叶片角度为24度和26度之间。
The NTSB found that the flight crew would have been unable to perceive any problem with the airplane until the propeller blade Angle was between 24 and 26 degrees.
通过DEMON分析可以获得诸如舰船螺旋桨转速、螺旋桨叶片甚至舰船的车数等不变的舰船物理特征。
Many invariable physical features can be obtained with DEMON analysis such as revolution rate of propeller, the propeller vane, and the number of propellers.
由于船体的影响，双桨船的螺旋桨处于斜向来流的条件下运转。斜流造成螺旋桨叶工作状态的非定常性。
Because of the influence of the hull, the stern propeller of a twin-screw vessel is working under condition of oblique flow, and the unsteady working condition of the blade of a propeller is created.
当螺旋桨要求的功率过高以至于轴转速达不到额定值时，可以采用切割螺旋桨叶梢的方法减小螺旋桨的负荷。
When the power required by propeller is so high that the shaft speed cann't arrive a rated value, the tip of propeller can be cut to decrease its load.
文章提出一种螺旋桨叶型数控加工编程新方法，通过实际加工证明其实用可靠，而且大大提高了表面加工质量和加工效率。
A new method of nc programming for impeller blade is introduced. It was proved that the method was very useful and credible by machining. The method improved the roughness and machining efficiency.
翼剖面；机翼；翼面一个部件或平面，如机翼、螺旋桨叶、方向舵等，其形状或方位控制稳定性、方向、抬升、冲击或驱动。
A part or surface, such as a wing, propeller blade, or rudder, whose shape and orientation control stability, direction, lift, thrust, or propulsion.
该模型可用于含初始缺陷或意外损伤的螺旋桨叶无限寿命可靠性分析和设计，得到桨叶可靠度与初始裂纹尺寸之间的函数关系式。
The model is applicable to the reliability analysis and design of infinite life for propeller blades or other structural members with initial defects and accident damage.
系统通过控制螺距控制单元(10)的杆(28)操作，螺距控制单元依次控制引擎速度和螺旋桨(14)的螺旋桨叶片(12)的螺距。
The system operates by a lever (28) which controls a pitch control unit (10) which in turn controls engine speed and also the pitch of propeller blades (12) of propeller (14).
这面由玻璃钢制作的大风扇由三片巨大的螺旋桨叶组成，每扇桨叶都像一面巨大的帆板，桨叶重5.6吨，整个大风扇的扇面直径达70米。
This fibreglass fan made up of three giant blades, each blade looking like a giant windsurfer and weighing 5.6 tons, the diameter of the entire fan reaching 70 metres.
提高高旁通飞机引擎的方法之一就是把风扇变成开放式旋翼，有点回归于螺旋桨的味道，但要使用两圈粗短的反旋桨叶。
One way to increase the efficiency of a high-bypass jet engine is to turn the fan into an open rotor, a bit like returning to propellers, but using two rings of stubby counter-rotating blades.
这个方法用一条目标曲线，几个螺旋桨桨叶角，模拟了飞机的10个飞行状态。
By using an objective curve and several propeller blade-angles, 10 flight states of aircraft are simulated.
结晶器搅拌桨采用船用螺旋桨结构，桨叶为复杂曲面。
The structure of the crystallizer propeller is the same as that of Marine propeller.
为螺旋桨桨叶的强度设计与结构优化提供了重要依据。
Test results provide an important basis for strength design and structural optimization of propeller blades.
本文提供了一种根据升力面理论计算螺旋桨桨叶表面压力分布和螺旋桨性能的数值方法。
A numerical method is presented for prediction of propeller performance and pressure distribution on blade surface according to lifting surface theory.
机翼承受垂向弯曲、弦向弯曲和扭转变形，螺旋桨旋翼的桨叶认为是刚性的并承受一阶挥舞和摆振。
The wing withstands vertical bending, chordwise bending and torsional deformations, and the rotor blade is considered to be capable of rigidly withstanding one order flap and lag motions.
本实用新型就是提供一种可有效延迟空泡的分离，并可延长螺旋桨桨叶使用寿命的截面拱度比非线性分布式船用螺旋桨。
The utility model provides a cross section camber ratio nonlinear distributed Marine propeller which can effectively delay the separation of the cavity bubble, and prolong the service life thereof.
本实用新型是一种螺旋桨，它包括桨毂及桨叶，其特征在于桨叶末端联接有轴向导流片。
The utility model relates to a propeller which comprises a propeller hub and blades and is characterized in that the ends of the blades are connected with axial flow guiding sheets.
本发明是一种旋轮翼，它具有缘肋和桨叶，其特征是：把旋翼或螺旋桨的桨叶和飞轮的轮缘及加强环肋结构有机地结合成为一个整体，使之具有飞轮与旋翼或螺旋桨的双重功能；
The invention is characterized by the combination of the blades of a propeller and the wheel rim or ring rib of a flywheel, and has dual functions of a flywheel and a rotor wing or a propeller;
本发明是一种旋轮翼，它具有缘肋和桨叶，其特征是：把旋翼或螺旋桨的桨叶和飞轮的轮缘及加强环肋结构有机地结合成为一个整体，使之具有飞轮与旋翼或螺旋桨的双重功能；
The invention is characterized by the combination of the blades of a propeller and the wheel rim or ring rib of a flywheel, and has dual functions of a flywheel and a rotor wing or a propeller;
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