Volume 34 Issue 02
Feb.  2008
Turn off MathJax
Article Contents
Zuo Linxuan, Wang Jinjun, Liu Yanget al. Effects of free stream local disturbance on delta wing aerodynamics[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(02): 197-201. (in Chinese)
Citation: Zuo Linxuan, Wang Jinjun, Liu Yanget al. Effects of free stream local disturbance on delta wing aerodynamics[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(02): 197-201. (in Chinese)

Effects of free stream local disturbance on delta wing aerodynamics

  • Received Date: 06 Feb 2007
  • Publish Date: 29 Feb 2008
  • The effects of free stream disturbance on micro air vehicle (MAV) aerodynamics was investigated using delta wings with disturbance introduced by an upstream cylinder in wind tunnel. The results indicate that the stall-delay happen when disturbance is introduced in the upstream of apex for both rigid and flexible delta wings, the stall-delay of rigid wing relates with wake flow of disturbing cylinder, the stall-delay for flexible wing not only relates with this but also with its vibration. Without disturbance or the disturbance introduced in the upstream of wing apex, the lift coefficient of flexible wing is larger than that of rigid one when attack angle is in the range of 4° to 18°, but the corresponding lift to drag ratio of flexible wing is smaller than that of rigid one. Because of the coupling among the vibrations of flexible wing, the flow structure and the aerodynamics, the dominant frequencies of flexible wing-s apex and tip vibration were changed regularly with the sweep angle increases. The dominant frequency of vibration for flexible wing tip is frequency of vortex shedding around stall angle.

     

  • loading
  • [1] Taylor G, Kroker A, Gursul I. Passive flow control over flexible non-slender delta wings . AIAA-2005-0865, 2005 [2] 伍康.弹性对40°后掠切尖三角翼气动特性的影响 .北京:北京航空航天大学航空科学与工程学院,2005 Wu Kang.The effect of flexibility on aerodynamics of 40-deg sweep cropped delta wings . Beijing: School of Aeronautic Science and Technology, Beijing University of Aeronautics and Astronautics, 2005(in Chinese) [3] Gordiner R E, Visbal M R. Computation of the aeroelastic response of a flexible delta wing at high angles of attack . AIAA-2003-1728, 2003 [4] Ifju P G, Jenkins D A, Ettinger S, et al. Flexible wing based micro air vehicles . AIAA-2002-0705, 2002 [5] 王晋军,伍康.机翼弹性变形对气动特性影响的实验研究[J].空气动力学学报,2007,25(1):55-59 Wang Jinjun,Wu Kang.Experimental investigations of the effect of wing elastic deformations[J]. Acta Aerodynamica Sinica, 2007,25(1):55-59(in Chinese) [6] Spedding G R, Lissaman P B S. Technical aspects of microscale flight systems[J]. Journal of Avian Biology, 1998, 29(4):458-468 [7] Heron I, Myose R Y. Impingement of a von karman vortex street on a delta wing[J]. Journal of Aircraft, 2005, 42(4):1084-1087 [8] Muller T J, Delaurier J D. Aerodynamics of small vehicles[J]. Annual Review of Fluid Mechanics, 2003, 35(1):89-111 [9] Rediniotis O K, Stapountzis H, Telionist D P. Periodic vortex shedding over delta wings[J]. AIAA Journal, 1993, 31(9):1555-1562
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article views(3263) PDF downloads(1244) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return