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。
To avoid the inaccuracy caused by this potential flow assumption, propeller designers have introduced the notion of the effective wake.
为了避免由于势流假设引起的不准确性，螺旋桨设计者引入了实效伴流的概念。
The information form the experimental studies could be helpful for the research of the complex flow around Marine propeller.
试验所获得的定量信息为螺旋桨尾流场复杂流动现象的揭示提供了帮助。
The apparatus consists of a single board microcomputer, propeller type velocity sensor, tail fin type flow direction sensor and corresponding interface circuits and software.
该仪器以单极微机为核心，配置旋浆流速传感器、尾舵式流向传感器、相应的接口电路和软件。
The ideal propeller model is used in this article to simplify the flow around the propeller.
本文采用理想螺旋桨模型来简化螺旋桨绕流问题。
At the same time, through the ventilator of the piping made of transparent, and put the propeller inside, so that children can learn how the wind flow.
包含通风装置和螺旋桨的通风管道是透明的，孩子们可以直观看到风流动的原理。
The surface panel method and an improved numerical Kutta condition have been applied to predict the hydrodynamic performance of a propeller in steady flow.
本文采用面元法和改进的数值库塔条件预报螺旋桨定常性能。
So the effective wake is the properly correction to the propeller analysis method based on potential flow theory which includes the interaction between the propeller and the inflow.
所以，实效伴流是对基于势流理论的螺旋桨分析方法的修正，它包含了螺旋桨和来流之间的相互影响。
It is verified by means of model test that the ship vibration is caused by the propeller-excited force, which is generated by the propeller running in the non-uniform stern flow field.
并通过模型试验进一步证实该船振动的成因主要是由于螺旋桨在不均匀流场中运转时产生的激振力所致。
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.
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。
The results indicate the PIV system in CSSRC is able to discern the fine difference of flow structure, and can supply important information to guide the design of appendages and propeller.
本文的工作表明 ，该大型PIV测试系统对细部流场结构的识别有着较大的潜力 ，研究结果对指导尾附体及推进器优化设计有重要参考价值。
The Euler equations of incompressible and inviscid fluid are used for control equations of the stern flow field, and the propeller is computed by lift line theory.
选取了不可压缩无粘流体的欧拉运动微分方程作为尾流场的控制方程，螺旋桨则用升力线理论计算。
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。
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。
A new portable propeller-type current meter BH-1 is introduced, which consists of three parts: flow velocity sensor, signal process circuit and data analysis software.
介绍了一种新型BH- 1型便携式旋桨流速仪，主要由自主研制的流速传感器、手持式主机及微机数据回放处理软件三部分组成。
In this paper, we propose a method of a propeller load modelling by studying the performance of a propeller load. A procedure flow chart of modeling is presented.
通过对螺旋桨负载特性的研究，提出了一种螺旋桨负载模型建模的方法，给出模型的计算机求解流程图。
In order to evaluate the security of an underwater towed system which is deployed or retracted from the up stabilizer of a submarine, the near wake flow field of the propeller and hull was calculated.
为了对置于潜艇尾部的水下拖曳系统在收放缆时的安全性进行评估，计算了螺旋浆和艇体的尾流近场。
The panel method was used to predict the wake flow field of propeller.
利用单斜丝热线旋转进行水平轴风力机模型的尾迹流场测量。
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。
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。
After the vortex distribution is solved according to the boundary condition of no-flow-penetrating through the blade surface, the velocity reduced by the propeller can be calculated.
根据桨叶表面流动不穿透条件解出升力面奇点后，然后再求它们对流场的扰动。
There iss strong vibration in the draft tube of a Francis turbine or axial flow fixed blade propeller hydraulic turbine when the turbine is running on part loading.
混流和轴流定浆式水轮机在部分负荷下运行时，尾水管中常出现较为强烈的振动。
This thesis tends to simulate the 3D viscous flow of a high-skew controllable pitch propeller by using FLUENT, which can serve as a design method without collection of illustrative plates.
本论文利用FLUENT的这些特点模拟大侧斜可调桨的三维粘性流场，在没有图谱可以利 用的条件下，使 CFD成为螺旋桨设计的手段之一。
This thesis tends to simulate the 3D viscous flow of a high-skew controllable pitch propeller by using FLUENT, which can serve as a design method without collection of illustrative plates.
本论文利用FLUENT的这些特点模拟大侧斜可调桨的三维粘性流场，在没有图谱可以利 用的条件下，使 CFD成为螺旋桨设计的手段之一。
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