摘要当今21世纪,能源紧张，经济形势严峻，环境污染严重。众多生存因素与社会因素促使我们船舶设计行业与航运行业做出相应的改变来适应这个时代。通过大量的理论分析与研究实验，在众多可再生新能源中，我们选择了风能作为化石燃料最好的替代品。并且，为了得到更好的稳定性与推进力，本文从翼型入手，重点分析风帆的空气动力性能。95180

本次研究主要有以下内容：查询并搜集与风帆助航相关的资料，了解近几年国内外在该领域的发展状况以及存在的问题；分析风帆在空气流体中的受力情况；利用GAMBIT软件建立二维模型，然后导入FLUENT中计算不同拱度比时入流攻角为-60度到60度的情况下帆翼的升阻比，由此得到最佳拱度比,同时得到最佳攻角与最大推力系数；利用GAMBIT软件建立三维模型，然后导入FLUENT中计算不同展弦比时入流攻角为-60度到60度的情况下帆翼的升阻比，确定最佳展弦比与基本翼型参数。

毕业论文关键词：节能环保，风帆助航，改进型帆翼，升阻比

Abstract Today, the 21st century, the energy is short, the economic situation is grim, and the enveronment is polluted seriously。 Many factors of survival and social have prompted our ship design and shipping transportation to make the appropriate changes to adapt to this era。 Through a large number of theoretical analysis and experiments, in much renewable new energy, we chose the wind energy as the best alternative to fossil fuels。 In  order  to get better stability and propulsion, this paper starts with the airfoil, focusing on the aerodynamic performance of sails。

The main contents of this study are as follows: to inquire and collect information related to sailing aids, and understand the development situation and existing problems of the field in recent years at home and abroad; to analyze the wind force in the air fluid; use GAMBIT software to establish the two-dimensional model and then imported into the FLUENT to calculate the drag-to-lift ratio when the angle is in the range of -60 degrees to 60 degrees。 Then use the GAMBIT software to establish the three-dimensional model and then introduced to the FLUENT to calculate the drag-to-lift ratio when the incoming angle is -60 degrees to 60 degrees, and determine the best ratio and the basic airfoil parameter。

Keywords: energy saving and environment protection, sail-assisted, improved sail, lift-to-drag ratio

目录

第一章绪论 1

1。1研究背景 1

1。2研究目的与意义 2

1。3国内外发展 3

1。3。1国外发展现状 3

1。3。2国内发展现状 5

1。4风帆船存在的问题 6

1。5本课题的研究内容 6

第二章CFD软件与机翼理论 8

2。1 GAMBIT软件介绍 8

2。2 FLUENT软件介绍 9

2。2。1FLUENT简介 9

2。2。2FLUENT的涉及与模拟范围 10

2。2。3使用FLUENT的注意事项 10

2。2。4FLUENT的基本用法与求解步骤 10

2。2。5FLUENT的特点 11

2。3风帆的分类情况 12

2。4改进型帆的简介