On the Added Mass of a Sphere in a Circular Cylinder Considering Real Fluid Effects
- Creators
- Mellsen, S. B.
- Ellis, A. T.
- Waugh, J. G.
Abstract
An experimental method combined with boundary layer theory is given for evaluating the added mass of a sphere moving along the axis of a circular cylinder filled with water or oil. The real fluid effects are separated from ideal fluid effects. The experimental method consists essentially of a magnetic steel sphere propelled from rest by an electromagnetic coil in which the current is accurately controlled so that it only supplies force for a short time interval which is within the laminar flow regime of the fluid. The motion of the sphere as a function of time is recorded on single frame photographs using a short-arc multiple flash lamp with accurately controlled time intervals between flashes. A concept of the effect of boundary layer displacement on the fluid flow around a sphere is introduced to evaluate the real fluid effects on the added mass. Surprisingly accurate agreement between experiment and theory is achieved.
Additional Information
Department of the Navy, Bureau of Naval Weapons Fluid Mechanics and Flight Dynamics Branch Contract N600(19)59368 to the California Institute of Technology and Task Assignment number RRRE-04001/216-1/R009-01-01 to the U. S. Naval Ordnance Test Station, Pasadena. Report No. E-124.1.Attached Files
Submitted - E-124.1.pdf
Files
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Additional details
- Eprint ID
- 57996
- Resolver ID
- CaltechAUTHORS:20150603-152348259
- Department of the Navy, Bureau of Naval Weapons
- N600(19)59368
- Department of the Navy, Bureau of Naval Weapons
- RRRE-04001/216-1/R009-01-01
- Created
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2015-06-04Created from EPrint's datestamp field
- Updated
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2019-10-03Created from EPrint's last_modified field
- Caltech groups
- Hydrodynamics Laboratory