Crow Instability - Wikipedia, the free encyclopedia
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In aerodynamics, the Crow instability is an inviscid line-vortex instability, named after its discoverer S. C. Crow. It is observed when the vortices caused by aircraft are being whirled from being ot...
en.wikipedia.org/wiki/Crow_Instability
Linear phase of the development of the Crow instability Coupling between the elliptic modes and the Crow mode has also been evidenced. The elliptic modes are artificially amplified by the Crow instability at the locations where the vortices are brought close together.
www.cerfacs.fr/cfd/wake_vortex_26.php
Photograph of The Crow Instability by Anders Jacobsen Some searching online tells us that this is caused by the so-called Crow Instability in the vortexes caused by aircraft;
www.extrospection.com/archives/2004/01/the_crow_instabi... www.extrospection.com/archives/2004/01/the_crow_instability.html
J. F. GARTEN, J. WERNE, D. C. FRITTS and S. ARENDT (2001). Direct numerical simulations of the Crow instability and subsequent vortex reconnection in a stratified fluid.
journals.cambridge.org/article_S0022112000002251
Spalart, P.R., and Wray, A.A., Initiation of the Crow Instability by Atmospheric Turbulence, AGARD 78th Fluid Dynamics Panel Meeting & Symposium, Trondheim, Norway, AGARD CP-584, Paper No. 18, May 1996.
citeseer.ist.psu.edu/context/563637/0
Motion in a Bose condensate: IX. Crow instability of antiparallel vortex pairs A: Math. Gen.15 2599 [/A] ). These solutions are unstable with respect to three-dimensional perturbations (the Crow instability).
api.ingentaconnect.com/content/iop/jphysa/2001/00000034... api.ingentaconnect.com/content/iop/jphysa/2001/00000034/00000047/art00311
Large Eddy Simulation of Aircraft Wake Vortices Within Homogeneous Turbulence: Crow Instability Our results confirm that the most amplified wavelength of the Crow instability and the lifetime of wake vortices are significantly influenced by ambient turbulence (Crow,
www.imaqs.uh.edu/kasa/paper/2000/sci/han.ji.2000.1.html
Crow Instability can combine the wake turbulence and tip vortice to produce a strengthened wake - at a certain distance behind Crow instability + transiting along the wake + a powerful rudder system + a light touch on the rudder pedals + the pilot's reactive control inputs = structural failure...
www.iasa.com.au/folders/Safety_Issues/RiskManagement/cr... www.iasa.com.au/folders/Safety_Issues/RiskManagement/crowinstability.html
[GM.002] Convective and absolute nature of the Crow and the elliptic instability...
flux.aps.org/meetings/YR00/DFD00/abs/S1060.html
The paper outlines some new discoveries; for example the small-scale instability waves on the vortices have a definite symmetry-breaking phase relationship between the two primary vortices, previously not observed experimentally, or even predicted analytically by classical works (Crow, 1970;
www.mae.cornell.edu/fdrl/research/wingvortex.html