摘要：螺旋桨是航空模型中最重要的零件之一，是航模飞机获得动力的关键部件。
Abstract: : the propeller is in the model airplane one of most important components, is the model ship airplane obtains the power the key component.
螺旋桨是航空模型中最重要的零件之一，是航模飞机获得动力的关键部件。
The propeller is in the model airplane one of most important components, is the model ship airplane obtains the power the key component.
对导管螺旋桨进行优化设计的分析与探讨，建立优化数学模型，通过实例说明其可行性。
It's analyzed and inquired into optimality design of duck propeller. Mathematical models are set up. It shows it's practicable through example.
最后讨论了新模拟方法在船后螺旋桨空泡与噪声模型试验中的应用。
Finally the application of the new modeling method to model test of cavitation and noise of propeller working behind is discussed.
并以模型试验的方法研究了不同充气方式和充气量对螺旋桨水动力和辐射噪声的影响。
The effects of different jet mode and air amount on propeller's hydrodynamics and radial noise are also studied by model tests.
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。
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.
采用了一个修正的螺旋桨尾涡模型，来模拟导管螺旋桨尾涡片的扭曲变形及分离现象。
A modified trailing vortex wake model of propeller is introduced to describe the distortion and separation of the trailing vortex sheet.
在建立舰船辐射噪声仿真模型的基础上，推导了单、双螺旋桨舰船辐射噪声调制谱谐波族幅值特征的数学期望表达式。
On the basis of building the ship radiated-noise model, the mathematical expectation expressions of ship radiated-noise demodulation spectrum harmonic clan feature were educed.
旨在研究满足螺旋桨飞机模型风洞试验要求的为高功率密度电驱动系统供电的低谐波变频电源。
The research in this thesis is focused on the low harmonic variable-frequency power for the system meeting the needs of wind tunnel propeller model testing requirements.
为了便于计算，对兴波部分简化了计算模型，螺旋桨用无限叶数螺旋桨模型来代替。
A simplified model of propeller with infinite number of blades is employed to account for the effect of free wave in this paper.
在几何光学模型近似下，对用TEM 00高斯激光束驱动微型螺旋桨结构的光驱动力和力矩进行了理论计算。
The optical force and torque of a micro-propeller-shaped rotor driven by TEM00Gaussian laser beam are calculated with a geometric-optics model.
在中国船舶科学研究中心拖曳水池中，通过滑行艇模型自航试验，研究了艇底气层对滑行艇推进性能的影响，结果表明：气层对采用水螺旋桨推进的滑行艇推进性能的影响不大。
The effect of bubbly layer on propulsion performance of planing craft is investigated by means of self-propelled model experiment in the towing tank of China Ship Scientific Research Center.
本文采用理想螺旋桨模型来简化螺旋桨绕流问题。
The ideal propeller model is used in this article to simplify the flow around the propeller.
据此理论模型，导得螺旋桨空泡噪声谱的表达式。
On the basis of above theoretical model, the spectrum formula of propeller cavitation noise has been derived.
探讨舰船螺旋桨空泡噪声指数衰减型随机脉冲序列的理论模型。
The present paper deals with theoretical model of random sequence of exponential attenuate acoustic pulses caused by ship propeller cavitation noise.
进一步优化螺旋桨尾涡模型，并进行了实例计算与试验结果、原计算结果对比分析，结果表明改进后的尾涡模型计算结果具有更高的精度。
Practical sample is calculated and experimental test is carried out. Comparison with the previous result shows that the improved wake model gives resalls with higher accuracy.
螺旋桨模型简化为一个激励盘，即一个无厚度可穿透的圆盘，以给定的圆盘拉力载荷，即压强差来模拟螺旋桨滑流的效果。
The N-S equations with adoption of an actuator disk model are used to simulate the effect of turbo-propeller slipstream on high-lift systems.
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 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.
针对螺旋桨叶片数识别问题，建立了螺旋桨空化噪声信号模型。
In order to solve the problem of propelle blade-number recognition, the propelle radiated-noise model is built on the basis of five hypotheses.
探讨了一种新型的潜艇流噪声与螺旋桨噪声的模型试验方法——自航模水动力噪声测试技术。
Comparison between the simulations of flow-noise of a submarine-like body with four different turbulent models;
同时，用参数化程序实现了船用螺旋桨的自动绘制。在论文的最后完成了船用螺旋桨计算机立体模型的建立和动画效果的处理。
At the same time the thesis brings the automatic drawing of propellers to success and builds the three-dimension model of propellers.
本文提出的变磁阻式螺旋桨动力仪除用于水面船模试验外，并可用于水下模型及多桨轴模型试验。
The R. P. D. is presented in this paper. Except the usual ship model test, it is possible to carry out measurement of tests for the underwater model and multi-propeller shaft model.
BP人工神经网络模型通过训练可以具备强大的非线性映射能力，以数学解析的形式，较好地提取了海量螺旋桨水动力性能数据特征；
Through trained, BP neural network can obtain strong nonlinear mapping ability to learn the data characteristics of the hydrodynamic performance of ship propeller as a mathematic analytic form.
BP人工神经网络模型通过训练可以具备强大的非线性映射能力，以数学解析的形式，较好地提取了海量螺旋桨水动力性能数据特征；
Through trained, BP neural network can obtain strong nonlinear mapping ability to learn the data characteristics of the hydrodynamic performance of ship propeller as a mathematic analytic form.
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