Experimental studies on isentropic efficiency of a nonequilibrium MHD disk generator

Journal Article · Sun Feb 01 04:00:00 EST 1998 · IEEE Transactions on Plasma Science

DOI:https://doi.org/10.1109/27.659534· OSTI ID:616156

Nakamura, Hajime ^[1]; Okamura, Tetsuji ^[2]; Shioda, Susumu ^[3]

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1. National Defense Academy, Yokosuka (Japan). Dept. of Mechanical Engineering
2. Tokyo Inst. of Tech., Yokohama (Japan). Dept. of Energy Sciences
3. Keio Univ., Fujisawa (Japan). Faculty of Environmental Information

Isentropic efficiency of the nonequilibrium MHD power generator was studied by a shock tube driven disk generator. Cesium seeded helium was used as a working gas. From the measurements of Faraday current density distribution, it was possible to estimate the general tendency of Joule dissipation in the generator. The Joule dissipation did not decrease due to the occurrence of nonuniformity of the plasma when external load resistance was low, although it decreased with the decrease in the load resistance when the load resistance was high. The electrical efficiency increased with the increase in applied magnetic flux density. This fact is thought to be caused by high Hall parameter and the stabilization of the plasma due to high degree of seed ionization.

• OSTI ID: 616156
• Journal Information: IEEE Transactions on Plasma Science, Journal Name: IEEE Transactions on Plasma Science Journal Issue: 1 Vol. 26; ISSN ITPSBD; ISSN 0093-3813
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
DISK MHD GENERATORS
ENERGY LOSSES
ISENTROPIC PROCESSES
NON-EQUILIBRIUM PLASMA
OPERATION
PERFORMANCE
PLASMA SEEDING