Electrodynamical (electric field, current density, electrical power density), hydrodynamic (shear stress) and thermal (heat flux density towards the walls) stresses in a linear segmented Faraday MHD channel have been investigated by means of numerical methods for the startup procedure, a transient from the open circuit (k=1) conditions to loads with K=0.5 (optimum load) and 0.3. The main characteristics of the MHD channel were chosen corresponding to a sample having been investigated before. It has been found that the hydrodynamical and thermal stresses manifest no increase due to the transient when compared with their steady state values. However, at k≠0.5 these can be larger than at k=0.5. In contrary to this, the electrical stresses show unwanted increases at k=0.3. Therefore, it is important to work at k=0.5. Several results of the calculations have been plotted graphically. Some recommendations for the channel design have been given.

Electrical stresses during transients in linear MHD channels / Borgi, K. A.; Massarini, A.; Madzanti, D.. - In: MAGNITNAIA GIDRODINAMIKA. - ISSN 0025-0015. - 29:3(1993), pp. 62-68.

Electrical stresses during transients in linear MHD channels

Massarini A.;
1993

Abstract

Electrodynamical (electric field, current density, electrical power density), hydrodynamic (shear stress) and thermal (heat flux density towards the walls) stresses in a linear segmented Faraday MHD channel have been investigated by means of numerical methods for the startup procedure, a transient from the open circuit (k=1) conditions to loads with K=0.5 (optimum load) and 0.3. The main characteristics of the MHD channel were chosen corresponding to a sample having been investigated before. It has been found that the hydrodynamical and thermal stresses manifest no increase due to the transient when compared with their steady state values. However, at k≠0.5 these can be larger than at k=0.5. In contrary to this, the electrical stresses show unwanted increases at k=0.3. Therefore, it is important to work at k=0.5. Several results of the calculations have been plotted graphically. Some recommendations for the channel design have been given.
1993
29
3
62
68
Electrical stresses during transients in linear MHD channels / Borgi, K. A.; Massarini, A.; Madzanti, D.. - In: MAGNITNAIA GIDRODINAMIKA. - ISSN 0025-0015. - 29:3(1993), pp. 62-68.
Borgi, K. A.; Massarini, A.; Madzanti, D.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1248853
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