航空学报 > 2010, Vol. 31 Issue (5): 909-913

一种联结翼布局气动特性的求解模型

楚亮1; 马东立1; 张朔2; 马铁林2   

  1. 1.北京航空航天大学 航空科学与工程学院2.北京航空航天大学 无人机所
  • 收稿日期:2009-04-21 修回日期:2009-07-13 出版日期:2010-05-25 发布日期:2010-05-25
  • 通讯作者: 楚亮

Solution Model for Aerodynamic Characteristics of Joined-wing Configuration

Chu Liang1;Ma Dongli1; Zhang Shuo2; Ma Tielin2   

  1. 1.School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics 2.Research Institute of Unmanned Aerial Vehicle, Beijing University of Aeronautics and Astronautics
  • Received:2009-04-21 Revised:2009-07-13 Online:2010-05-25 Published:2010-05-25
  • Contact: Chu Liang

摘要: 联结翼布局与常规布局相比具有结构重量轻、诱导阻力小、升力系数大和稳定性良好的特点。从升力线理论出发,引入普朗特对干扰因子的假设,推导出适合于平列式联结翼布局的气动求解模型,并给出了干扰因子的取值范围。该模型保持了工程估算方法所具有的简单、快捷的优势,与计算流体力学(CFD)计算结果的对比显示,模型具有较好的精度。研究结果表明,在机翼面积不变的情况下,增大前翼展弦比、展长比及翼隔可有效降低总诱导阻力,与单翼布局相比诱导阻力最大可降低28%。

关键词: 联结翼, 气动模型, 干扰因子, 工程估算, 计算流体力学

Abstract: The joined-wing configuration, as compared with the normal configuration, is characterized by low structural weight, small induced drag, big lift coefficient and good stability. Starting from the lifting line theory and introducing Prandtl assumption of interference factor, this article derives an aerodynamic solution model for parallel joined-wing layout, and provides the value range of its interference factor. This model retains the advantages of engineering estimation in simplicity and rapidity, and a comparison with the calculation results of computational fluid dynamics (CFD) indicates that the precision of this model is preferable. The results show that an increase of aspect ratio, span ratio and space of the front wing, while keeping the wing area invariable, could reduce the total induced drag effectively. The induced drag is reduced by 28% as compared with the single-wing configuration.

Key words: joined-wing, aerodynamics model, interference factor, engineering estimation, computational fluid dynamics

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