Agreement between the numerical results of reduced velocity around an open-water propeller and the measurements is satisfactory.
敞水螺旋桨的脉动速度计算结果与试验结果吻合良好。
This avoids the use of a traditional propeller shaft and puts the propellers in a clear flow of water, which greatly improves efficiency.
这样就避免了使用传统的螺旋轴，将螺旋桨置于干净的水流中，从而大大提高了效率。
The screw propeller is very efficient for push water.
在螺旋桨是非常有效的推水。
A new propeller model open - water test was carried out in the decompressible towing tank .
本文介绍了在减压拖曳水池中最新开发的桨模敞水试验技术。
The test results indicated that the variation of the spacing between propeller and rudder bulb has obvious effect on propeller open water efficiency.
试验结果表明，桨、舵球间距的变化对螺旋桨敞水效率的影响是明显的。
The open water characteristics of a series of large hub-diameter Ratio MAU propellers are calculated by using lift-surface method to expand the chart of MAU-series propeller.
采用升力面涡格法对系列大毂径MAU型螺旋桨进行敞水性能计算，运用理论算法扩充了MAU型螺旋桨图谱。
Open water test and cavitation test of standard propeller 4119 are carried out in depressurized towing tank.
本文选用标准桨模4119，在减压拖曳水池进行了常压下的敞水重复试验及减压下的空泡性能试验。
The hydrodynamic performance of podded propeller is calculated, including the open water characteristics and bearing force.
用面元法对吊舱螺旋桨的水动力性能进行了计算，得到了吊舱推进器的敞水曲线和轴承力。
In view of the resistance and propulsion, the load water line, shape of sections, half Angle of entrance, forms of tunnel and their effect on propeller were analysed and compared.
根据我国航道条件就现有浅水拖输艏艉线型形状进行了探讨，从阻力和推进观点出发对满载水线、横剖面形状、半进水角和各种坠洞以及它们对螺旋桨的影响等加以分析、比较。
Meanwhile the open water characteristics of the propeller were predicted by using the lifting surface theory. Comparison with to experimental data showed that calculation errors are acceptable.
应用升力面方法理论计算螺旋桨切割前后的敞水性能，与试验值的比较表明计算值误差在可接受的范围内。
By its rotation in water or air, the propeller produces thrust on the Blades, which gives forward motion to the vehicle.
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。
Can be used in ship industry, cold water treatment, sea water and cold oil, Low pressure valves, rotating equipment, and reciprocating pump hydraulic squeeze machine, the ship propeller equipments.
可应用于船舶行业、冷水处理、海水及冷油上；低压阀门，旋转设备，及往复泵液压榨机，轮船螺旋桨等设备。
It usually works in the oblique flow, and its blades come into and out of the water surface, therefore vertical forces are generated as the propeller rotates.
由于表面桨一般在斜向流中工作，且存在桨叶出入水面，所以表面桨在工作时会产生垂向力。
The transverse effect of the propeller blades at the top near the surface of the water is not strong enough to counteract the opposite effect of the lower blades.
螺旋桨的叶片在靠近水面上方横向效应不强，足以抵消低刀片相反的效果。
Viscous flow around a duct propeller under open water condition was simulated by solving RANS equations, and the characteristic of the flow field was described.
采用求解RANS方程的方法对某导管桨敞水流场进行数值模拟，并对导管桨流场特点进行分析。
In order to predict the hydrodynamic performance of propeller with boss cap fins, CFD software was used to calculate the its open water performance.
为了预报毂帽鳍的水动力性能，采用计算流体力学软件对粘性流场中毂帽鳍的敞水性能进行计算研究。
When the water with the same water-flow flows, water running thrust force suffered by the mobile type magnet sensor with two propeller blades can be increased.
当同样的水流量流过时，具有两片螺旋桨片的活动磁铁传感器受到的水流推力会增加。
Then the mechanism analysis of the planetary gear train propulsion that is the main part of the water-jet propeller is carried out.
然后，对推进器的主要部分——行星轮系推进装置进行机构分析。
Then the mechanism analysis of the planetary gear train propulsion that is the main part of the water-jet propeller is carried out.
然后，对推进器的主要部分——行星轮系推进装置进行机构分析。
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