타원형 고리와에 의한 음향 반사(II) : 두 타원형 고리와의 상호 관통Sound Radiation from Elliptic Vortex Ring (ll): Mutual Threading Motion of Two Elliptic Vortex Rings

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 509
  • Download : 0
A vorticity field of the elliptic 팩tex filament in the low Mach number flow is generated when the configuration of the cold jet exit is elliptic shape. The leap-frogging motion, as it is sometimes called, is the `mutual threading motion` is developed between two vortex rings, and affects the far field acoustic signals significantly. In this study, the far field acoustic signals is validated by comparisons with the analytic solution of circular vortex ring interaction. And after that, flow and far field acoustic calculations for two elliptic vortex rings are investigated numerically. Vortex motions and acoustic signals from two identical elliptic vortex rings, placed initially with selected separation distances, are calculated. The characteristics of the kinematic motions of two elliptic vortex rings is that t재 elliptic 패rtex rings hate different eigenfrequencies: the first from the axis switching phenomena of elliptic 패rtex ring and the second from the leap-froggingphenomenon. The acoustic signals are accompanied with these characteristics. Especially, strong acoustic signals are generated at thin instant of leaf-frogging motion.
Publisher
한국항공우주학회
Issue Date
1997-06
Language
Korean
Citation

한국항공우주학회지, v.25, no.3, pp.46 - 55

ISSN
1225-1348
URI
http://hdl.handle.net/10203/75850
Appears in Collection
AE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0