Criteria for selecting a magnet for a MHD device

Author

Geri, A. ; Veca, G.M. ; Pasotti, G.

Author_Institution

Dept. of Electr. Eng., Rome Univ., Italy

Volume

28

Issue

1

fYear

1992

fDate

1/1/1992 12:00:00 AM

Firstpage

458

Lastpage

461

Abstract

The authors analyze the influence of superconducting (SC) magnets (in air or in iron) on the behavior of the same MHD (magnetohydrodynamic) device for different shapes of duct. The features of the device are evaluated by means of a code which analyzes a 3-D lumped-parameter electrical network equivalent to the fluid flow. It is shown that, for the established operating conditions, if there are no constraints on the dimensions and weight of the device, the best choice is a magnet with a circuit partially in iron. Even though there may be a slight drop in performance, there is an estimated 50% reduction in cost. The reduction in the performance of the devices with SC magnets in iron is considered to be mainly associated with the range of field decays observed in frontal edges. This suggests that it might be possible to further optimize the magnet in iron by varying the dip in field decay according to the frontal edges with reference to the longitudinal dimension of the pump

Keywords

magnetic fields; magnetohydrodynamic conversion; pumps; superconducting magnets; 3D lumped parameter network; EM DC pump; MHD device; duct shape; field decays; fluid flow; frontal edges; superconducting magnet selection criteria; Costs; Ducts; Fluid flow; Iron; Magnetic analysis; Magnetic circuits; Magnetic devices; Magnetohydrodynamics; Shape; Superconducting magnets;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.119910

Filename

119910