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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2006, Vol. 27 ›› Issue (3): 395-398.

• 论文 • Previous Articles     Next Articles

Investigation of Flow and Twin-Vertical Tail Buffet Characteristics of Leading-Edge Extension Configuration

LI Jin-jie1, YANG Qing1, XIAO Chun-sheng1, YANG Yong-nian1, MOU Rang-ke2, ZHANG Ji-ting2, QI Pi-qian2   

  1. 1. National Key Laboratory of Aerodynamic Design and Research, Northwestern Polytechnical University,Xi'an 710072, China;2. Aircraft Strength research institute, Xi'an 710065, China
  • Received:2004-12-14 Revised:2005-07-04 Online:2006-06-25 Published:2006-06-25

Abstract: A flow visualization experiment to a Leading-Edge Extention (LEX) Configuration is conducted in the NF-3 wind tunnel at Northwestern Polytechnical University using a laser light sheet technique. The flow visualization pictures are obtained at eight longitudinal stations from Leading-Edge Extension to the trailing edge of the vertical tail by the laser light sheet. Combining with the result of the vertical tail buffet characteristic obtained from the wind tunnel experiment, the visualization experiment come to the conclusion that the bursting of the vortex shed from LEX is the primary contributor to the twin-vertical tail buffet.

Key words: laser light sheet, LEX vortex, twin-vertical tail buffet, root bending moment, tip acceleration

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