摘要随着石油价格的上涨和全世界石油资源的日趋缺乏，以及人类对环境污染和气候 恶化的担心，风能的干净无污染引发了造船界和航运业的关注，风帆也因而成为一个 重要的研发方向。风帆的形状对风帆性能具有显著影响，如何设置船舶上风帆的尺寸 从而达到对风能的最优利用，降低船舶航行时的阻力，这也是我们现在研究的重点之 一。81954

本文的研究内容主要是：1。调研收集分析有关资料，了解风帆助推船及帆翼相关 研究现状；2。依据已有资料，以改进翼型为对象，利用 fluent 软件分析不同厚度比和 拱度比对翼型特性的影响，优选翼型参数；3。运用翼型理论，对最优参数翼型，利用 fluent 软件计算出攻角-10°到攻角 60°时不同风速和帆向角情况下的最佳几何攻角曲 线和推力系数曲线，并分析模拟结果。

通过分析，得知攻角-10°到攻角 60°时各帆向角情况下推力系数变化相近，攻角 60°处，推力系数最大，最佳几何攻角均为 60°。最大推力系数曲线的总体趋势是随着 帆向角的增大而减小。

毕业论文关键词:翼型；空气动力性能；数值模拟

ABSTRACT With the rise of oil prices and the increasing lack of oil resources around the world, as well as human concerns about environmental pollution and climate deterioration,the clean energy of wind energy has caused the shipbuilding industry and shipping industry to pay attention to, so it has become an important research and development direction。Theshape of the sail has a significant effect on the performance of the sail。How to set the size of the ship to achieve the optimal utilization of wind energy,and reduce the resistance of the ship,is one of the focuses of our research。

The main research contents of this paper:1。Investigation and analysis of relevant information, to understand the current situation of the study of the sail propelled boat and sail wing;2。Based on the available data, using Fluent software to analyze the influence of different thickness ratio and camber ratio on the airfoil characteristics;3。Basedon the airfoil theory,on the optimum parameters of the airfoil, using the Fluent software to calculate the angle of attack -10° to 60° at the angle of wind speed and the direction of the sail to the angle of the optimal geometric and the thrust coefficient curve, and analysis of simulation results。

Through analysis ， we get that when the angle of attack is -10° to 60°, the thrust

coefficient of each sail is similar, and the angle of attack is 60°, the maximum thrust coefficient and the optimum geometric angle of attack are 60°。The general trend of the maximum thrust coefficient curve is decreased with the increase of the sail angle。

Key word：Airfoil；Aerodynamic performance；numerical simulation

目录

第一章 绪论 1

1．1本文研究的目的和意义 1

1．2 研究现状 1

1。2。1 翼型空气动力特性研究现状 1

1。2。2 风帆助航现状 2

1．3 本文的主要工作 2

第二章机翼理论 4

2。1 机翼的几何参数 4

2。2 升力系数和阻力系数 4

2。3 Fluent 基础理论 5

2。3。1 控制方程 5

2。3。2 湍流模型 6

2。3。3 近壁流动与壁面函数