哈尔滨工业大学本科毕业设计（论文）
毕业设计（论文）
题 目 导管尺寸对螺旋桨性能的影响
专 业 船舶与海洋工程 学 号 110610325 学 生 姜权权 指 导 教 师 周军伟 答 辩 日 期 2015年6月29日
哈尔滨工业大学本科毕业设计（论文）
摘 要
本文主要研究的是导管螺旋桨，由于导管螺旋桨相对于常规螺旋桨来讲有自己特有的优点，比如提高螺旋桨的效率，降低螺旋桨的空泡数，增加螺旋桨的推力等。考虑到船舶运输的经济性，近年船舶不断向大型化，高速化的发展，结合导管螺旋桨特有的一些优点，因此导管螺旋桨的应用越来越普遍，人们对导管螺旋桨的研究也越来越重视，以希望最大限度的利用导管螺旋桨的优点，并尽可能地克服其缺点，来寻求导管螺旋桨的设计最优化。虽然现在人们对导管螺旋桨的研究越来越深入，但是在导管尺寸对螺旋桨性能的影响方面的研究还相对比较的滞后，因此本文主研究导管尺寸对螺旋桨性能的影响，分别用pointwise和autogrid画出静止域和转子域的网格，然后导入到cfx中进行水动力模拟计算。改变水流速度，计算不同水流速度下的推力和扭矩。以此画出标准桨在不同水流速度下的推力、扭矩和效率曲线。然后通过改变导管内外径，计算不同内外径下的推力、扭矩、和效率。并画出在不同内外径，不同进速下的推力、扭矩、效率曲线，通过比较不同内外径，不同进速下的推力、扭矩和效率曲线，以此来寻求导管内外径和桨叶的最优化配合，为以后导管螺旋桨的设计提供基本的依据。通过研究发现，在一定水流速度下，增大导管直径可以提高导管的推力和扭矩增大螺旋桨的效率。但随着导管的增大，其受到的阻力也随之增大，所以导管的尺寸要依据螺旋桨直径，水流进速来寻求导管与螺旋桨的最优化配合。
关键词：导管螺旋桨；导管内外径；水流速度；推力；扭矩；效率
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哈尔滨工业大学本科毕业设计（论文）
Abstract
This paper studies the ducted propeller, as compared to conventional ducted propeller propeller concerned have their own unique advantages, such as improving propeller efficiency and reduce the number of propeller cavitation, increase propeller thrust and the like. Taking into account the economics of shipping, shipbuilding continued in recent years to large-scale, high-speed development, combined with some unique advantages of ducted propeller, thus increasing application of ducted propeller, propeller catheter study people more and more attention, to want to maximize the use of the advantages of ducted propeller, and as much as possible to overcome their shortcomings, seek to optimize the design of ducted propeller. Although the study of ducted propeller people deeper and deeper, but the incidence of catheter size propeller performance of research still relatively lag, so the impact of this article main research conduit sizes of propeller performance, respectively, with pointwise and autogrid draw static field and rotor field grid, and then imported into cfx performed hydrodynamic simulation. Change the flow rate, calculate thrust and torque different flow speeds. In order to draw a standard pulp thrust, torque and efficiency curves at different flow speeds. Then by changing the outside diameter of the inner conduit to calculate thrust, torque, and efficiency under different inside and outside diameter. And draw on different internal diameter, thrust into the speed under different torque, efficiency curve, by comparing different internal diameter, thrust, torque and efficiency curves under different feed speed, in order to seek the outer diameter of the inner conduit and the blade optimization with the provision of basic basis for future design of ducted propeller. The research shows that, at a certain flow rate, increasing the vessel diameter catheter can be improved thrust and torque is increased efficiency of the propeller. But with the increase of the catheter, which also increased by the resistance, so the catheter size should be based on the propeller diameter, flow into the speed to seek to optimize the propeller with a catheter.
Keywords: ducted propeller, inner and outer conduit, flow rate, thrust torque, efficiency
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哈尔滨工业大学本科毕业设计（论文）
目 录
摘 要 ....................................................................................................................... I Abstract ..................................................................................................................... II 第1章 绪 论 ........................................................................................................... 1
1.1 课题背景 .................................................................................................... 1 1.2 研究的目的与意义 .................................................................................... 2 1.3 国内外相关理论的发展概况 .................................................................... 3
1.3.1 螺旋桨的分类及特性 ..................................................................... 3 1.3.2 导管的几何参数 ............................................................................. 3 1.3.3 导管分类 ......................................................................................... 4 1.3.4 导管翼型 ......................................................................................... 4 1.4 本文完成的主要内容： ............................................................................ 6 第2章 导管螺旋桨网格划分 ................................................................................. 7
2.1 静止域网格划分 ........................................................................................ 7 2.2 旋转域网格的划分 .................................................................................. 10 2.3 本章小结 .................................................................................................. 14 第3章 导管螺旋桨水动力模拟 ........................................................................... 15
3.1 cfx边界条件的设置 ................................................................................. 15
3.1.1 cfx简介 .......................................................................................... 15 3.1.2导管螺旋桨的边界条件在cfx中的设置 ..................................... 15 3.2 k-omega湍流模型 .................................................................................... 21 3.3 本章小结 .................................................................................................. 22 第4章 不同导管尺寸导管桨的建模过程 ........................................................... 24
4.1 改变导管尺寸 .......................................................................................... 24 4.2改变桨叶尺寸 ........................................................................................... 27 4.3本章小结 ................................................................................................... 29 第5章 不同尺寸的导管螺旋桨的水动力模拟及后处理 ................................... 30
5.1不同尺寸导管螺旋桨的水动力性能计算 ............................................... 30
5.1.1不同尺寸导管螺旋桨推力系数的计算和比较 ............................ 30 5.1.2不同尺寸导管桨扭矩系数的计算和比较 .................................... 31 5.1.3 不同尺寸导管桨的效率计算 ....................................................... 32
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哈尔滨工业大学本科毕业设计（论文）
5.2 cfx对桨叶性能的后处理 ......................................................................... 33 5.3 本章小结 .................................................................................................. 36 结 论 ..................................................................................................................... 37 参考文献 ................................................................................................................. 39 致 谢 ..................................................................................................................... 38
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