Analysis of real gas effects in a plasma vane MHD generator
- Universita di Bologna (Italy)
A new type of generator has been recently proposed to increase the performances of the MHD conversion. In the space and time dependent current carrying non-uniformities plasma vane MHD generator, hot plasma structures are supposed to be concentrated in narrow regions (plasma vanes or clots) along a linear channel. The Lorentz force acts on the plasma vanes decelerating them. A cold non conducting gas expands between the vanes exerting its pushing action an the clots. The conversion is realized through the interaction of these two phases. In this conversion method it is possible to operate the generator with a gas temperature significantly lower than in the uniform flow regime. Therefore higher values of the enthalpy extraction can be obtained. Values up to 40% are calculated. The study of the processes in a plasma vane MHD generator has been done by means of 1D and 2D time dependent models. 2D models are needed to study two dimensional effects caused by the interaction of the clots with the insulating walls of the channel. A reference system with the x axis in the flow direction, the y-axis in the anode cathode direction and the z-axis in the direction of the magnetic induction is utilized. The flow is studied in the x-z plane. The equations describing the system are derived from the principles conservation of mass, momentum (x and z component) and energy. In Ref. 3 a perfect gas was considered. Viscosity and thermal conductivity were neglected. The numerical solution was obtained by means of the Godunov-Kolgan algorithm.
- OSTI ID:
- 254648
- Report Number(s):
- CONF-950697-; TRN: 96:002621-0035
- Resource Relation:
- Conference: 33. symposium on engineering aspects of magnetohydrodynamics, Tullahoma, TN (United States), 13-15 Jun 1995; Other Information: PBD: 1995; Related Information: Is Part Of Proceedings of the SEAM 33rd symposium on engineering aspects of magnetohydrodynamics; PB: 500 p.
- Country of Publication:
- United States
- Language:
- English
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