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Vortex Studies Relating to Boundary Layer Turbulence and NoiseThe present study considers the two-dimensional case of an array of N rectilinear, like-sign vortices above an infinite flat boundary. The method of images can be employed with this configuration to reduce the problem to that of 2N vortices in free space, constrained by 2N symmetry relations. This system is Hamiltonian and therefore certain invariants of the motion are known. Further, from the Hamiltonian constant, the equations of motion are readily derived and may be integrated numerically to determine the vortex trajectories. This knowledge of the time-dependent vortex motion then allows the resulting noise radiation to be computed by standard aeroacoustic techniques.
Document ID
19860002548
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Adelman, J. L. (George Washington Univ. Hampton, Va., United States)
Hardin, J. C. (George Washington Univ. Hampton, VA, United States)
Date Acquired
August 12, 2013
Publication Date
October 1, 1985
Publication Information
Publication: NASA. Lewis Research Center Numerical Tech. in Acoustics
Subject Category
Acoustics
Accession Number
86N12015
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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