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On the Added Mass of a Sphere in a Circular Cylinder Considering Real Fluid Effects

Mellsen, S. B. and Ellis, A. T. and Waugh, J. G. (1966) On the Added Mass of a Sphere in a Circular Cylinder Considering Real Fluid Effects. California Institute of Technology , Pasadena, CA. (Unpublished)

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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.

Item Type:Report or Paper (Technical Report)
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.
Group:Hydrodynamics Laboratory
Funding AgencyGrant Number
Department of the Navy, Bureau of Naval WeaponsN600(19)59368
Department of the Navy, Bureau of Naval WeaponsRRRE-04001/216-1/R009-01-01
Record Number:CaltechAUTHORS:20150603-152348259
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57996
Deposited On:04 Jun 2015 16:19
Last Modified:03 Oct 2019 08:31

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