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Volume 26 Issue 6
Jun.  2000
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Journal of Beijing University of Aeronautics and Astronautics  > 2000  >  26(6): 684-687.
Liu Yanqiang, Huan Ji. Data communication protocol based on dual CAN bus for digital servo drive[J]. Journal of Beijing University of Aeronautics and Astronautics, 2006, 32(06): 729-733. (in Chinese)
Citation: ZHANG Hua, Lü Zhi-yong, YUAN Hui-jinget al. Flow Visualization of Swept Wing/Body Junctions[J]. Journal of Beijing University of Aeronautics and Astronautics, 2000, 26(6): 684-687. (in Chinese)
shu

Flow Visualization of Swept Wing/Body Junctions

  • 1.

    Beijing University of Aeronautics and Astronautics, Dept. of Flight Vehicle Design and Applied Mechanics

  • 2. Peking University, Dept. of Mechanics and Engineering Science

  • Received Date: 18 Oct 1999
  • Publish Date: 30 Jun 2000
    Abstract
  • Flow visualization test of swept wing/body junctions has been performed with laser light sheet technique and sodium-fluorescence dyed liquid method in the water channel of BUAA. The results show that in addition to Reynolds number, the angle of attack and the swept angle are also very important parameters that influence the horseshoe vortex characteristics in the juncture zone. It is found that there exists a new kind of 3-D steady vortex system——back vortex, which is different from the horseshoe vortex and the Karman vortex. The back vortex exists for both swept cylinder and swept wing conditions. It comes from the rear part of the junctions and extends into space. The back vortexes will breakdown under certain angle of attack and the swept angle. The characteristic of swept wing back vortex is different from that of swept cylinder back vortex. The forming mechanism of this back vortex system and its relationship with horseshoe vortex system are also discussed. Finally, some typical sections of the junctions have been measured using PIV technique.

     

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    • References(1)
  • [1] Baker C J. The laminar horseshoe vortex[J]. J of Fluid Mechanics, 1979, 95(2):347~367． [2]Thomas A S W． The unsteady characteristics of laminar juncture flow[J]． Phys of Fluids, 1987, 30(2):283~285． [3]Khan M　J, Ahmed A, Trosper J　R． Dynamics of the juncture vortex[J]．AIAA Journal,1995, 33(7):1273~1278． [4]Seal C V, Smith C R, Rockwell D． Dynamics of the vorticity distribution in endwall junctions[J]． AIAA Journal, 1997, 35(6):1041~1047．
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