文档介绍：南京航空航天大学
硕士学位论文
新型微型旋翼飞行器气动布局设计与气动特性分析
姓名:姬国生
申请学位级别:硕士
专业:飞行器设计
指导教师:唐正飞
20080101
南京航空航天大学硕士学位论文
摘要
因微型飞行器具有特殊的飞行性能和潜在的应用前景正越来越受到各国军
方和民用部门及科研人员的重视目前已经研制了多种不同功能不同构型和不
同气动布局的微型飞行器如固定翼式旋翼式和扑翼式等固定翼和扑翼式
能够实现快速前飞旋翼式能够垂直起降和悬停但是既能实现垂直起降和悬停
又能快速前飞的飞行器不多
本文综合固定翼和旋翼飞行器的优点应用涵道风扇的结构型式设计了一种
新型气动布局的微型旋翼飞行器它能实现垂直起降悬停和快速前飞本文首
先分析了适合低雷诺数的微型旋翼应用动量叶素理论对其进行了气动特性分析
为便于整个飞行器的性能分析及 CFD 计算文中对飞机模型特别是旋翼模型作
了适当简化把旋翼的作用当作动量源进行处理引入了自定义函数嵌入到 CFD
的计算程序中在对计算域进行网格划分及边界条件设定后应用 CFD 方法分别
计算了机身尾部涵道封闭机身尾部涵道打开和机身尾部涵道打开并有尾翼等三
种不同气动结构的气动特性
通过计算分析发现所设计的飞行器在悬停和各前飞速度下飞行器的重力
与飞行器所提供的拉力前飞的阻力与飞行器所提供的推力以及风扇的扭矩与
反扭矩之间基本配平能够实现垂直起降悬停和快速的前飞
关键词微型飞行器旋翼飞行器气动布局气动特性涵道风扇
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新型微型旋翼飞行器气动布局设计与气动特性分析
ABSTRACT
Nowadays some military and civil departments and researchers pay more attention
to micro air craft (MAV), because of its special flight performance and latent
application. Different function, conformation and layout of aerodynamic crafts are
designed out in ession, such as fixed wings, rotor aircrafts and ornithopter. Fixed
wings aircrafts and ornithopter can fly forward fast, and rotary wings aircrafts can
vertically take off and land and hover, but the aircrafts which can vertically take off and
land , hover and also can fly forward fast are rare.
The thesis integrates the good points of fixed wings and rotary wings and applies
ducted fan structure to design out new pattern aerodynamic-layout micro craft which
can VTOL and hover and also can fly forward fast, and to design out micro rotary
wings fitting the Low-Reynolds. Subsequently, in order to fit the calculation of CFD
software, the thesis sets up the geometric model of the new pattern MAV with rotary
wings and simplifies the model and leads User-defined functions (UDF) to give
computed fields to generate grid. Furthermore, it uses CFD separately pute the
rear end of duct, the rear end without rotary wings of bypass and the rear end with
rotary wings of bypass. Eventually, the pares the thre