The Application of Propeller Flow Velocity Meter and Its Special Sensor in the River Project Model;
河工模型中旋桨式流速仪及特殊传感器的应用
According to the special requirements of engineering experiment, the authors developed mini- propeller sensor, sensors of velocity distribution along vertical line, sensors of velocity distribution along horizontal line with elevating frame and underwater sensor, which can used for measuring the velocity in lakes and channels.
根据工程实验的特殊需要 ,研制了渠道 /湖泊用微型旋桨式流速传感器、垂线流速分布传感器、带升降架的水平线流速分布传感器和潜水型流速传感器 ,本文介绍了这些传感器的基本结构、测量误差分析 ,并研究了它们在工程特殊测流问题中的应用 。
According to the special requirements of engineering experiment,the importance and investigation of propeller folw meter are expatiated in engineering model test.
根据工程实验的特殊需要,阐述了旋桨式流速仪在工程模型试验中的重要性及研究情况,并着重介绍了HD-4B型电脑流速仪的原理、工作制、传感器的造型、与EMV-1型电磁流速仪及检定车比测的结果,及其在解决量测多点缓变非恒定流速及快速量测恒定流速中的应用。
Origination of Gas Hole in Cu Alloy Propeller;
浅析铜合金螺旋桨铸件气孔缺陷产生原因
Aluminous air propeller composite anti-corrosion technology;
铝质空气螺旋桨综合防腐蚀技术
Cutting tool selection in the NC machining of propeller blade with a constant pitch;
等螺距螺旋桨数控加工中的刀具选择
Study on simulated system of boati s propulsion motor and screw propeller s load;
舰船推进电机及螺旋桨负载模拟系统研究
This paper analyzes the mechanism of underwater vehicle′s radiating noise,especially the noise with linear PSD (Power Spectral Density),and predicts the line spectrum′s frequencies of dynamic device and screw propeller respectively.
分析水下航行体辐射噪声,特别是线谱噪声的形成机理,分别给出动力装置和螺旋桨旋转产生的线谱的频率预报公式。
The results obtained from the simulation testing by double digital signal processing(DSP) 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。
This paper posits that the flow at stern will be unusual if designing stern lines without considering of U or V of body lines and exit angle of water lines;random flow around screw will directly make the ship vibrate hard.
文章认为在船尾型线设计中若不考虑横剖线的UV度、各水线去流角大小等对船体振动的不利影响,很可能会导致艉部水流异常;螺旋桨盘面处非定常及分布不均匀的艉流将直接导致船体剧烈振动。
But till now, the deflective force of single-screw ship for stopping maneuver haven t been discussed fully, people can t explain the intricate deflective phenomenon.
但是,由于单螺旋桨舰船制动机动过程中的偏向力尚未得到充分的研究和论述,目前还不能完善地定性、定量分析单桨船制动机动中的复杂的偏转现象。
In screw design,the selecting of operating mode immediately influence the economy and reliability of ship,in order to bring more economic benefit to ship owner,in this paper,the matching of ship,engine and sc rew has been investigated from an angle of reducing energy.
在设计螺旋桨时 ,选择不同的工况点直接影响船舶的经济性及可靠性 ,本文从节能的角度探讨船、机、桨匹配问题 ,以使船东能获得较大经济效益。
By studying the reliability in designing calculation of the propeller shaft s diameter with reliable analyzing method, the paper presents an actual analyzing method with instances.
利用可靠分析方法,对船舶螺旋桨轴轴径的设计计算进行了可靠性研究,结合计算实例给出了具体的分析方法。
Research on the condition monitoring of screw shaft;
船舶螺旋桨轴油液监测的研究
In order to push forward the application of oil-monitoring technique on marine machinery,the necessity of oil monitoring on screw shaft is introduced in this paper.
为了推动油液监测技术在船舶机械中的应用 ,文中对船舶螺旋桨轴实施油液监测的必要性进行了介绍 ,以两条不同类型的船舶为例 ,采集油样并进行了检测分析 ,得到了螺旋桨轴正常状态下主要磨损元素的浓度和主要磨损类型磨粒的显微特征。
Fluid-structure coupling kinetic analysis of propellers;
螺旋桨的流固耦合动力分析
A numerical method is presented for predicting the steady performance of ducted propellers operating in a uniform flow.
建立了计算导管螺旋桨在均流中的定常水动力性能的数值方法，螺旋桨用涡格法、导管用面元法分别计算，两者的相互影响则通过迭代计算加以考虑。
The performance prediction of three propellers and a vane wheel shows the results are satisfactory.
预估船舶螺旋桨和桨后自由叶轮的水动力性能，并考虑粘性和三维流动对叶剖面的零升为角、拱度和升为系数斜率的影响，通过对三个螺旋桨和一个自由叶轮的性能预报结果表明，本文的预报结果是令人满意的。
Reseaches on mathematical model and digital simulation of electric propulsion system of double propellers;
双螺旋桨电力推进系统数学模型与数字模拟的研究