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Calculations and experiments concerning lifting force and power in TEMPUSA critical comparison is reported between the theoretically predicted and experimentally measured values for the electromagnetic lifting force and the heating rates which may be achieved, under simulated microgravity conditions, using the TEMPUS electromagnetic levitation device. The experiments involved the suspending of a metallic sample from one arm of a recording balance, such that it was carefully positioned between the heating and the positioning coils of the levitation device. The net force exerted by the sample was measured as a function of position, the coil currents, and the nature of the sample. Some calculations are also reported regarding the power absorption by the sample. The theoretical predictions, based on the numerical solution of Maxwell's equations using the volume integral technique, were found to be in excellent agreement with the measurements. For the idealized case of a spherical sample, analytical solutions describing the lifting force were also found to agree very well with the computed results.
Document ID
19930058935
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Zong, J. H.
(NASA Headquarters Washington, DC United States)
Szekely, J.
(MIT Cambridge, MA, United States)
Lohofer, G.
(DLR Inst. fuer Raumsimulation, Cologne, Germany)
Date Acquired
August 16, 2013
Publication Date
May 1, 1993
Publication Information
Publication: Acta Astronautica
Volume: 29
Issue: 5
ISSN: 0094-5765
Subject Category
Materials Processing
Accession Number
93A42932
Distribution Limits
Public
Copyright
Other

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