Note
College of Engineering and Computer Science
Member of
Contributors
Publisher
Florida Atlantic University
Date Issued
1993
Description
An experimental study of the vortex response to interaction with and cutting by a thin flat
plate or circular cylinders of various diameters has been performed. The direction of
motion of the flat plate (or circular cylinder) is normal to the vortex axis in the experiments.
The vortex is generated by withdraw of fluid at an orifice at the bottom of an "inner
cylinder" immersed in a rectangular tank, and the flow field is visualized with both water
soluble and immiscible dyes. In the experiments with circular cylinders, the bending of
the vortex is compared to computational predictions from [15], and the mechanism of
subsequent breakup of the vortex as it gets closer to the cylinder is studied. The vortex is
observed to bend farther without breakup for larger forward speeds of the circular cylinder.
Very little bending is observed when the vortex interacts with the flat plate, except for
angles of attack exceeding the stall limit Following cutting of the vortex by the flat plate or
circular cylinder, a vortex shock is observed to form and propagate up the vortex axis. No
vortex shock is observed on the opposite side of the blade. The various forms of these
vortex shocks have been photographed, and they appear very similar to travelling vortex
breakdowns. The propagation speed of the shocks is compared to an analytical solution for
instantaneous vortex cutting by a flat plate of zero thickness.
plate or circular cylinders of various diameters has been performed. The direction of
motion of the flat plate (or circular cylinder) is normal to the vortex axis in the experiments.
The vortex is generated by withdraw of fluid at an orifice at the bottom of an "inner
cylinder" immersed in a rectangular tank, and the flow field is visualized with both water
soluble and immiscible dyes. In the experiments with circular cylinders, the bending of
the vortex is compared to computational predictions from [15], and the mechanism of
subsequent breakup of the vortex as it gets closer to the cylinder is studied. The vortex is
observed to bend farther without breakup for larger forward speeds of the circular cylinder.
Very little bending is observed when the vortex interacts with the flat plate, except for
angles of attack exceeding the stall limit Following cutting of the vortex by the flat plate or
circular cylinder, a vortex shock is observed to form and propagate up the vortex axis. No
vortex shock is observed on the opposite side of the blade. The various forms of these
vortex shocks have been photographed, and they appear very similar to travelling vortex
breakdowns. The propagation speed of the shocks is compared to an analytical solution for
instantaneous vortex cutting by a flat plate of zero thickness.
Language
Type
Form
Extent
74 p.
Subject (Topical)
Identifier
14977
Additional Information
College of Engineering and Computer Science
FAU Electronic Theses and Dissertations Collection
Thesis (M.S.)--Florida Atlantic University, 1993.
Date Backup
1993
Date Text
1993
Date Issued (EDTF)
1993
Extension
FAU
FAU
admin_unit="FAU01", ingest_id="ing1508", creator="staff:fcllz", creation_date="2007-07-19 03:27:17", modified_by="staff:fcllz", modification_date="2011-01-06 13:09:16"
IID
FADT14977
Issuance
monographic
Organizations
Attributed name: Florida Atlantic University
Attributed name: College of Engineering and Computer Science
Attributed name: Department of Ocean and Mechanical Engineering
Person Preferred Name
Krishnamoorthy, Srikanth.
Graduate College
Physical Description
74 p.
application/pdf
Title Plain
experimental study of vortex response during cutting by a blade or cylinder
Use and Reproduction
Copyright © is held by the author, with permission granted to Florida Atlantic University to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder.
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Origin Information
1993
monographic
Boca Raton, Fla.
Florida Atlantic University
Physical Location
Florida Atlantic University Libraries
Place
Boca Raton, Fla.
Sub Location
Digital Library
Title
experimental study of vortex response during cutting by a blade or cylinder
Other Title Info
An
experimental study of vortex response during cutting by a blade or cylinder