Performance Of Disk MHD Generator Research Articles

Numerical Study on the Effect of Anode Position on the Performance of Disk MHD Generator

The unsteady-state quasi-one-dimensional numerical simulations of the disk MHD generator have been conducted for various anode position. The results indicate that the non-equilibrium ionization instability of the plasma can be effectively suppressed by the appropriate anode position, and thus, the performance of the non-equilibrium disk MHD generator can be improved. Moreover, when the geometry and boundary conditions of disk MHD generator are determined, the optimal position of the anode is predicted to maximize the enthalpy extraction rate of the generator.

Improvement of performance of disk MHD generator with argon by introduction of swirl

AbstractAn experimental study of performance of the disk MHD generator with argon was carried out using a shock‐tube driven facility. An inlet swirl was introduced in the MHD channel in order to improve the enthalpy extraction and the isentropic efficiency. The experimental results were compared with those of the disk MHD generator without the inlet swirl. A high enthalpy extraction of 25.7% was obtained and the highest isentropic efficiency for argon was achieved at the same time in the present experiment. The measured static pressure in the MHD channel was kept lower than that without the inlet swirl. This has suggested that the introduction of the inlet swirl reduces the retarding force for the flow and that the increase of the enthalpy extraction is ascribed to the increase of the flow velocity and of the electrical efficiency. Furthermore, the flow without shock wave was observed at low seed fractions and low load resistances. At the same time, it was found for the first time that when there was no shock wave, the isentropic efficiency became higher than that with the shock wave. © 2002 Wiley Periodicals, Inc. Electr Eng Jpn, 141(1): 18–25, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10045

Performance of disk MHD generator with high magnetic flux density

Performance of disk MHD generator with high magnetic flux density

Performance of disk MHD generator with high magnetic flux density

The advantages of implementing high magnetic flux density up to 10 T for a commercial size closed cycle disk MHD generator with supersonic flow are discussed, and the technical feasibility of its superconducting magnet is studied. The present study suggests a high performance of the generator with high magnetic flux density. A possible construction of the magnet, in which a special structure is arranged to sustain a large electromagnetic force induced between the coils, is shown.

ディスク形MHD発電機の性能に与える高周波電磁界印加の効果

ディスク形MHD発電機の性能に与える高周波電磁界印加の効果

片側アノード電極ディスク形MHD発電機の性能

片側アノード電極ディスク形MHD発電機の性能

断面積比の小さなディスク形MHD発電機の性能に与えるノズル負荷とよどみ点圧力の影響

断面積比の小さなディスク形MHD発電機の性能に与えるノズル負荷とよどみ点圧力の影響

ディスク形MHD発電機における負荷接続の影響

ディスク形MHD発電機における負荷接続の影響