碟形变体飞艇设计与气动特性分析

Design and Aerodynamic Characteristics Analysis of Dish Transformable Airship

为了提高飞艇的水平抗风性能,减少现有飞行器对电池的依赖性并延长其续航时间,文中提出一种四旋翼控制的太阳能碟形变体飞艇,并对其进行三维结构设计。基于计算流体力学数值模拟技术,采用SpalartAllmaras模型分别对可变体的碟形飞艇艇体、球形飞艇艇体,在进行变体后,对其各自模型进行气动性能数值模拟计算。结果表明,在艇体体积相等情况下,碟形变体飞艇比球形变体飞艇具有更好的水平抗风性能。为了使碟形变体飞艇获得更好的水平抗风性能,其竖向变体尺寸需加以限制。

In order to improve airship’s performance that resistance to horizontal wind,reducing that aircraft’s performance depend on battery and extending flight time,In this paper,a kind of solar dish transformable airship controlled by four-rotor is proposed,and the dish transformable airship’s structure is designed by CATIA software,using of Spalart-Allmaras model base on the numerical simulation technologies of computational fluid dynamics to calculate aerodynamic performance what dish transformable airship’s body and sphere transformable airship’s body after they have changed.The results showthat,the dish transformable airship is good at resistance to horizontal wind than sphere transformable airship when they are the same volume;the vertical dimension of dish transformable airship’s body must be controlled for getting better performance that resistance to horizontal wind.