推进效率

采用偏移桨传动提高船舶推进效率的研究

A study on the off - centre propeller for raising the ship 's propulsive efficiency

由尾鳍拍动产生侧向力导致的机器鱼的艏摇能够影响航行器的推进效率。

The side force generated by swing of tail fin will influences the propulsive efficiency of robot fish .

弹性装置提高机器鱼推进效率的研究

Improvement of the Thrust Efficiency of Robotic Fish with Added Spring

提高旧船推进效率的有效方法

An effective way of improving propellor efficiency for old ship

表面效应使机翼推力增大，推进效率提高。

The ground effect increases the thrust force and efficiency .

高手与一般游泳者的推进效率有区别吗？

Is there a difference in propelling efficiency between experienced and inexperienced subjects ?

由此产生了优化船体设计、提高推进效率等船舶节能技术。

As a result , the hull design optimization and enhancing propulsion efficiency technology are invented .

②流量匹配后，出口面积较小、长度较长的二元收敛喷管总推力和推进效率较高。

A nozzle with greater length and smaller throat area has greater gross thrust and better efficiency .

乌贼能够通过以较低的速度喷射较大质量的液体，获得较高的推进效率。

Squid can achieve high efficiency by jetting a large mass of water to a low velocity .

为了合理利用能源，文中引入相对推进效率作为是否施加推力的门限。

Considering the energy consumption , the relative thrust efficiency is introduced as a threshold deciding whether to thrust or coast .

船用螺旋桨是一类典型的自由曲面零件，它的设计和制造精度直接决定了其推进效率。

Marine propeller is a type of free form surface part . Its design and manufacture precision decide ship 's thrust efficiency directly .

结果表明，在各个攻角状态下，手并拢划水均能获得更高的推进效率。

The results show that swimming with fingers holding together provides higher propulsive efficiency than swimming with fingers splaying at various angles of attack .

对水下喷雾发动机的非设计点性能进行了分析，结果表明实际运行环境与设计环境存在一定差异时，发动机仍然可以正常工作，并具有较大的推力和较高的推进效率。

The off-design performance is analyzed , and results indicate that the mist jet propulsion engine can produce higher thrust and efficiency under off-design working environment .

乌贼喷射与火箭喷射原理相似，故采用火箭发动机推进效率来计算其流体推进效率。

The principle of squid jetting is similar to the rocket jetting , so the propulsive efficiency used in rocket propulsion is also fit to squid propulsion .

加油站建设前期策划项目管理是提高加油站项目建设推进效率，打造项目竞争力的重要手段。

The pre-planning project management of the gas stations is to improve the propulsive efficiency of the project , and is an important means to creating project competitiveness .

在江西移动，知识管理是该公司实现卓越发展的重要抓手，也是推进效率提升工作的重要组成部分。

In Jiangxi Mobile company , knowledge management is an important starting point to achieve superior development , also an important part of the work To promote efficiency .

计算结果给出了不同环境压强下推力器的推力、比冲、推进效率和出口平面冲量密度分布。

The results present thrust , specific impulse and thrust efficiency of the thruster under various environmental pressures , as well as impulse density distribution on the exit plane .

针对数据库中现有的水力模型，对模型的所有排列方式进行计算，得到在两级轴流泵中首级采用高比转速的叶轮可以提高喷水推进器的推力和推进效率。

The conclusion shows that using high specific speed impeller in the first step of the two-stage axial flow pump can improve the trust and efficiency of the propulsion system .

数值模拟结果对比给出了辐射模型和非辐射模型流动分布情况，并比较了两种模型推力器推力、比冲和推进效率。

By virtue of numerical simulations , flow distributions within the thruster , thrust , specific impulse and thrust efficiency of the thruster in radiation and no radiation models are presented .

鱼类经过上亿年的进化、演变，已与自然完美地融为一体，鱼类游动时其推进效率可达80%，且兼有出色的机动性能。

Fish possesses the excellent swimming performance of high efficiency which can be up to80 % , and it also performs high maneuverability after millions of years evolution in the nature .

泵喷推进器是近年来发展起来的一种推进器，具有推进效率高，辐射噪声低，临界航速高的优点。

Pump jet propulsor ( PJP ), which was developed in the past several years , is a new propulsor with high propulsion efficiency , high critical velocity and low radiated noise .

利用推导出来公式对瞬时受力的值进行计算，得到尾鳍的推进效率、推力系数、侧向力系数和力矩系数。

Therefore , several parameters in terms of propulsion efficiency , propulsion coefficient , lateral force coefficient and torque coefficient could be obtained via computations of instant force by using the formula conducted .

针对传统水中电磁流体推进效率低、实现难的问题，将等离子体推进与水介质中爆炸丝现象相结合，研制出了实验用水中脉冲等离子体推进模型。

According to the problem that electromagnetic hydrodynamic propeller in the past is inefficient and hardly realized , this paper proposes the design that combines the plasma propulsion with exploding wires phenomenon in water medium .

全文介绍了在老旧船上加装节能补偿导管和对螺旋桨进行削边技术改造后带来的节能和减轻主机负荷，改善船、机、桨匹配等的效果，提高了船舶的推进效率。

This paper introduces the energy saving and reducing loading of engine after installing energy-saving compensating duct and cutting propeller edge in old ship , improving the match of marine engine and propeller and the propelling efficiency .

船用螺旋桨属于典型的自由曲面类零件，其桨叶叶型复杂，制造精度及表面质量直接关系到舰船推进效率、振动、操纵性能及桨叶本身强度。

Marine propeller is a kind of typical free-form surface part , its blade is complexity , machining accuracy and surface quality are directly related to the efficiency of ship propulsion , vibration , manipulation performance and blade strength .

同时，计算了仿金枪鱼水下航行器匀速直线游动时的水动力性能，比较了摆动尾鳍在有躯体影响与无躯体影响下的输入、输出功率系数和推进效率。

We calculated the hydrodynamic performance of tuna-like body when tuna swim in a uniform velocity , and compared the input power coefficient , output power coefficient and propulsive efficiency of the oscillating tuna-tail with or without body vortexes shedding .

讨论了约化频率、无因次升沉运动幅度、俯仰运动幅度、升沉和俯仰运动的相位差、尾流时均速度剖面、尾涡卷起程度对振动翼推力和推进效率的影响。

Moreover , the effect on thrust and propulsive efficiency is considered for reduced frequency , non-dimensional heaving amplitude , pitching amplitude , phase difference between heaving and pitching motion , wake velocity profile , and the extent of wake rollup .

而改型方案3则较方案1（原型）的兴波阻力下降30%，其有效功率下降5.7%~3.1%，推进效率提高2.6%。

However , compared with project one , the wave resistance of project three is reduced by 30 % , the effective power is reduced by 5.7 % ~ 3.1 % and the final propulsion efficiency is increased by 2.6 % .

通过实验获得了不同结构尺寸的推力器不同工作条件下的工作性能，通过数值模拟给出了推力器的流场结构，预计了其推力、比冲和推进效率。

Operating performance of thrusters with various structure and size under various working conditions is obtained in experimental study , and flow distributions within some thruster are presented and its thrust , specific impulse and thrust efficiency are predicted in numerical study .

为了提高推船的推进效率及单位功率的推载量，节约能源，提高顶推运输的经济效益，国外正在加紧开发推船船型及隧道尾型。

In order to improve the propulsive efficiency and carrying capacity of unit power of the pushboat , save energy , and increase the economic results of pushing transport , the pushboat form and tunnel form are being developed abroad with great effort .