TY - JOUR
T1 - Three-dimensional wortex structure in a leading-edge separation bubble at moderate reynolds numbers
AU - Sasaki, Kyuro
AU - Kiya, Masaru
PY - 1991/1/1
Y1 - 1991/1/1
N2 - This paper describes the results of a flow visualization study which concerns threedimensional vortex structures in a leading-edge separation bubble formed along the sides of a blunt flat plate. Dye and hydrogen bubbles were used as tracers. Reynolds number (Re), based on the plate thickness, was varied from 80 to 800. For 80 < Re < 320, the separated shear layer remains laminar up to the reattachment line without significant spanwise distortion of vortex filaments. For 320 < Re < 380, a ∧-shaped deformation of vortex filaments appears shortly downstream of the reattachment and is arranged in-phase in the downstream direction. For Re > 380, hairpin-like structures are formed and arranged in a staggered manner. The longitudinal and spanwise distances of the vortex arrangement are presented as functions of the Reynolds number.
AB - This paper describes the results of a flow visualization study which concerns threedimensional vortex structures in a leading-edge separation bubble formed along the sides of a blunt flat plate. Dye and hydrogen bubbles were used as tracers. Reynolds number (Re), based on the plate thickness, was varied from 80 to 800. For 80 < Re < 320, the separated shear layer remains laminar up to the reattachment line without significant spanwise distortion of vortex filaments. For 320 < Re < 380, a ∧-shaped deformation of vortex filaments appears shortly downstream of the reattachment and is arranged in-phase in the downstream direction. For Re > 380, hairpin-like structures are formed and arranged in a staggered manner. The longitudinal and spanwise distances of the vortex arrangement are presented as functions of the Reynolds number.
UR - http://www.scopus.com/inward/record.url?scp=0026219171&partnerID=8YFLogxK
UR - http://fluidsengineering.asmedigitalcollection.asme.org/article.aspx?articleid=1427198
U2 - 10.1115/1.2909510
DO - 10.1115/1.2909510
M3 - Article
AN - SCOPUS:0026219171
VL - 113
SP - 405
EP - 410
JO - Journal of Fluids Engineering, Transactions of the ASME
JF - Journal of Fluids Engineering, Transactions of the ASME
SN - 0098-2202
IS - 3
ER -