查询词典 propeller

Usually, the fullest efficiency of screw propeller is 75% with the rest energy lost in the way of whirlpool.

通常螺旋推进器最大效率为75％，其余的能量以漩涡的形式损失。

This paper starts with the analysis of balance of ship energy, and gets energy transfer relationship between ship diesel engine and screw propeller.

因此，船舶机桨匹配研究和冷却系统研究越来越受到世界造船业和航运业的重视，成为船舶科技领域的重要课题之一。

. It is easy to adapt to the Stirling engine boat, but the propulsive force is lower than that of the screw propeller.

人们很容易适应斯特林发动机船，但推进力是低于螺旋桨。

Vector control is the foundation of high performance PMSM control system Every vector control is analyzed and compared and several system characteristic are studied with special screw propeller load in this thesis, and then it is put forward that optimal torque control is the best control method of PMSM propulsion system.

本文对现有的几种矢量控制进行了深入的分析和比较，并结合推进系统特殊的螺旋桨负载研究了系统的各种特性，提出把转矩最优控制方案应用到舰船永磁同步电动机推进系统中。

And the main content of this paper is as the following:(1) The establishment of matching calculation platform of screw propeller and diesel engine.

柴油机是船舶的主要动力来源，螺旋桨是推进船舶前进的执行机构，二者性能的好坏以及匹配效果如何将直接影响到船舶的营运经济性能和航行安全性能；船舶冷却系统是柴油机高温受热部件正常、高效运行的重要保证，冷却系统的设计与选型适当与否将直接决定主机功率能否充分发挥。

And then according to the chose engine checks screw propeller dimension and calculates the maximum speed of the ship.

进行匹配设计后螺旋桨空泡校核、船舶航行特性分析及主机性能分析。

Compared with the fixed-bed experimental results in which coal and solid heat carriers are mixed by screw propeller,the baffle mixing is more effective.

中国石油资源短缺，煤的高效、综合利用在一定程度上可以减少对进口石油、天然气的依赖。

The results obtained from the simulation testing by double digital signal processing system confirm that the DTC system fits for synchronous motor with screw propeller by three level inverter and the system operation performance is perfect.

采用双DSP系统对电动机带螺旋桨负载的推进系统进行了半实物仿真，结果表明文中提出的控制策略能对三电平逆变器供电的同步电动机实施高性能的调速控制。

That is,"Mary", with a screw propeller of the big ships, set sail from Odessa, the ship carrying 500 tons of wheat, traveling very fast, particularly large load.

那是"玛丽"号，一艘装有螺旋推进器的大轮船，它从敖德萨启航，船上载着五百吨小麦，行驶速度非常快，负重又特别大。

The paper has a modularization analysis of ship electrical propulsion system. The paper develops the simulating mathematical model of every subsystem. It includes the thrust and torque of screw propeller, the resistance and re-torque in the movement of ship.

本文对船舶电力推进系统进行了模块化分析，建立了船舶运动中螺旋桨推力、扭矩，船舶运动的阻力，偏转的阻转矩等不同功能子模块的数学模型。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。