Numerical study of the performance of a current carrying non uniformity MHD generator
- Institute for High Temperature, Moscow (Russian Federation)
- Univ. of Bologna (Italy); and others
The first results of the numerical simulation activity carried on in the frame of the Trilateral Project on MHD Power Generation with Plasma Nonuniformities - Gas Interacting Flows, are presented. The numerical simulations are done by means of one dimensional and two dimensional time dependent models of the nonuniform plasma flow inside the MHD generator channel. Firstly an ideal nonuniform structure is considered. It consists of slabs of hot plasma (clots or plasma vanes) perpendicular to the channel axis. The hot plasma slabs are separated by cold gas. A constant velocity distribution along the channel is assumed as optimal loading criterion. The enthalpy extraction obtained by means of one dimensional calculations, increases with the decrease of the fraction between clot volume and volume of the cold gas. A reference case with a 16 m channel and a volume traction of 0.175 results to have an enthalpy extraction of about 0.36. The current distribution along the channel, obtained by means of one dimensional calculations, is utilised as input for the two dimensional calculations. When simulating the channel operation with the two dimensional time dependent model, the reference case with a slab structure of the clot shows a behaviour with one dimensional characteristics. The generator performance obtained is approximately equal to that given by the one dimensional simulation. Two dimensional effects are introduced by considering the clot separated from the insulating wall. The cold gas circulating around the clot, creates vortexes which degrade the structure of the flow.
- OSTI ID:
- 273305
- Report Number(s):
- CONF-930626-; TRN: 96:003380-0013
- Resource Relation:
- Conference: 31. symposium on engineering aspects of magnetohydrodynamics, Whitefish, MT (United States), 29 Jun - 1 Jul 1993; Other Information: PBD: 1993; Related Information: Is Part Of Proceedings of the 31st symposium on engineering aspects of magnetohydrodynamics; PB: 570 p.
- Country of Publication:
- United States
- Language:
- English
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