Change of asymmetric vortex-flow pattern as function of reynolds number and incidence behind circular cone

W. H. Stahl, A. Asghar

Research output: Contribution to conferencePaperpeer-review

2 Scopus citations

Abstract

An experimental investigation was carried out on two, geometrically similar, slender, circular cones of different dimensions at high angles of attack in a low-speed airstream over a wide range of Reynolds numbers. The principal aim of the present work was to get some insight into the behavior of the leeward, separated vortex flow after onset of vortex asymmetry, particularly its dependance on angle of attack and Reynolds number, respectively. To this end, the separated vortex flow was made visible by means of smoke and viewed in two laser-light planes, perpendicular to the cones' axes at, as well as one base diameter upstream of the bases. The range of Reynolds numbers covered was from ReD ^ 5,000 to 202,000 (formed with the base diameter); for this range laminar flow was likely to exist. The separated, asymmetric vortex-flow exhibited a complex behavior when changing Reynolds number and angle of attack, respectively. The degree and sense of asymmetry of the vortex-pair changed, and an oscillating mode was observed to appear and disappear.

Original languageEnglish
Pages240-245
Number of pages6
DOIs
StatePublished - 1996

Bibliographical note

Publisher Copyright:
© 1996, American Institute of Aeronautics and Astronautics, Inc.

ASJC Scopus subject areas

  • General Energy
  • Aerospace Engineering

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