Numerical simulation study of disk MHD generator for nonequilibrium plasma (NPG) system

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:254652

Tsunoda, Kazumi ^[1]; Harada, Nob ^[2]

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1. Shibaura Institute of Technology, Tokyo (Japan)
2. Nagaoka Univ. of Technology (Japan)

Design and performance prediction of a disk-shaped magnetohydrodynamic (MHD) generator, which is applied to the nonequilibrium plasma generator (NPG) system, have been carried out by means of a quasi-one-dimensional numerical simulation. The calculations have been performed for generator with constant height which is planned to be used for NPG-MHD disk generator pulse power demonstration. A maximum enthalpy extraction ratio obtained from the present calculation reached up to 20%, and, in this case, the electron temperature of working plasma fluctuated in the unstable regime against ionization instability. Taking into account this phenomenon, in order to obtain much higher generator performance, the MHD channel, in which electron temperature was kept at 5000 K, was designed. With this channel, enthalpy extraction ratio of 40% and output power of 7.2 MW were achieved without major modification of the supersonic nozzle, the inlet swirl vanes and the configuration of magnet system.

• OSTI ID: 254652
• Report Number(s): CONF-950697--
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
COMPUTERIZED SIMULATION
DESIGN
DISK MHD GENERATORS
ENTHALPY
MHD CHANNELS
NON-EQUILIBRIUM PLASMA
PERFORMANCE
TEMPERATURE DISTRIBUTION