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N-S Simulations of Crow-Type Instabilities in Vortex WakeThree-dimensional Navier-Stokes simulations of the Crow instability of wake vortices are conducted using large-eddy simulations without background turbulence. Sinusoidal displacement has been specified as the initial perturbation for the vortex system. The results have shown that the minimum Crow instability wavelength is about one vortex spacing shorter than predicted by Crow's linear stability theory. The planar- standing-wave-angle value and the amplitude indifference behavior agree with Crow's analysis. Simulations with periodicity in the axial direction have indicated minor influence of axial flow on the Crow instability.
Document ID
19990064531
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
Authors
Zheng, Z. C. (University of South Alabama Mobile, AL United States)
Baek, K. (University of South Alabama Mobile, AL United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1999
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
AIAA Paper 99-0981
Meeting Information
Meeting: Aerospace Sciences
Location: Reno, NV
Country: United States
Start Date: January 11, 1999
End Date: January 14, 1999
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
CONTRACT_GRANT: NAG1-1911
Distribution Limits
Public
Copyright
Other

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