A Numerical Study of Instability and Vortex Breakdown of Swirling Flow
Author : Dario Amirante
Publisher :
Page : 186 pages
File Size : 45,57 MB
Release : 2007
Category :
ISBN :
Author : Dario Amirante
Publisher :
Page : 186 pages
File Size : 45,57 MB
Release : 2007
Category :
ISBN :
Author : José L. Stevens
Publisher :
Page : 142 pages
File Size : 28,62 MB
Release : 1996
Category : Aerodynamics
ISBN :
Author : Jasim Uddin Ahmad
Publisher :
Page : 318 pages
File Size : 12,64 MB
Release : 1989
Category : Fluid dynamics
ISBN :
Author : Kenneth E. Torrance
Publisher :
Page : 44 pages
File Size : 19,30 MB
Release : 1971
Category : Eddies
ISBN :
Author : S. V. Alekseenko
Publisher : Springer Science & Business Media
Page : 505 pages
File Size : 20,55 MB
Release : 2007-08-29
Category : Technology & Engineering
ISBN : 3540733760
This book presents comprehensive and authoritative coverage of the wide field of concentrated vortices observed in nature and technique. The methods for research of their kinematics and dynamics are considered. Special attention is paid to the flows with helical symmetry. The authors have described models of vortex structures used for interpretation of experimental data which serve as a ground for development of theoretical and numerical approaches to vortex investigation.
Author : R. M. Kopecky
Publisher :
Page : 44 pages
File Size : 41,88 MB
Release : 1971
Category : Fluid mechanics
ISBN :
Author : S. Leibovich
Publisher :
Page : 22 pages
File Size : 15,82 MB
Release : 1983
Category :
ISBN :
Theoretical and experimental results, some quite recent, on the instability and breakdown of concentrated vortices at high Reynolds numbers are reviewed. Wave related theories of the vortex breakdown phenomena are treated in some detail; these appear to provide a qualitative description of the response of vortex breakdown to variations in swirl or flow rate, and Benjamin's criticality classification, a wave-based concept, is consistent with experimental data. Known general criteria for the stability of instability of inviscid columnar vortices are reviewed, together with numerical studies of an inviscid vortex model that provides an excellent analytical fit to measured velocity profiles in vortices that experience breakdown. A new analysis of experimental data on vortex breakdown flows sheds light on the interplay between criticality and instability. The flows sufficiently far upstream of breakdowns to be unaffected by them are supercritical and stable, but they are generally closer to marginal instability than they are to criticality. The wakes are both subcritical and unstable. A conceptual framework for vortex breakdown, incorporating nonlinear wave theory and instability to three-dimensional disturbances, is suggested based on information derived from the experimental studies. (Author).
Author : William Henry Suters
Publisher :
Page : 122 pages
File Size : 13,85 MB
Release : 1994
Category : Fluid dynamics
ISBN :
Author : R. E. Spall
Publisher :
Page : 28 pages
File Size : 32,38 MB
Release : 1987
Category :
ISBN :
Author :
Publisher :
Page : 4 pages
File Size : 37,19 MB
Release : 1968
Category : Aeronautics
ISBN :