EFFECT OF YAW ANGLE ON THE FORMATION OF VORTEX BREAKDOWN OVER THE DIAMOND WING

Yayla S. , CANPOLAT Ç., ŞAHİN B., Akilli H.

ISI BILIMI VE TEKNIGI DERGISI-JOURNAL OF THERMAL SCIENCE AND TECHNOLOGY, cilt.30, sa.1, ss.79-89, 2010 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 30 Konu: 1
  • Basım Tarihi: 2010
  • Dergi Adı: ISI BILIMI VE TEKNIGI DERGISI-JOURNAL OF THERMAL SCIENCE AND TECHNOLOGY
  • Sayfa Sayıları: ss.79-89

Özet

In this study, the flow structure close to the surface of the non slender diamond wing was investigated both qualitatively and quantitatively using dye visualization and the 3-D Particle Image Velocimetry (PIV) technique. The flow structure and formation of the vortex breakdown were studied by varying the yaw angle of the wing within the range of 0 degrees <=theta <=<15 degrees for the angle of attack of alpha=7 degrees and Reynolds number of 10 000. After a certain distance from the wing apex, a stagnation points and onset of vortex breakdowns took places on the central axes of spiral vortices that occurred over the wing surface for the angle of attack of alpha=7 degrees. When the yaw angle was increased the locations of vortex breakdowns approached to the wing apex, but, the other one moves towards the trailing edge.