Author: Bert Zauderer
Publisher:
ISBN:
Category :
Languages : en
Pages : 19
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The report presents a summary of the progress during the past year on a continuing investigation aimed at determining the operating characteristics of the linear, non-equilibrium MHD generator. The main effort of the past year was concentrated on reducing the electrode losses in the generator by using heated electrodes which protruded into the gas stream. Using an MHD channel, which was specially constructed for this purpose, large scale electrical power was obtained for the first time in cesium seeded, noble gases at gas stagnation temperatures as low as 2000K. Various electrode structures, both hot and cold, were investigated; but the electrode design was not as important as the cesium concentration in determining the electrode drops. During the past year, construction of a larger MHD channel and of a considerably more powerful MHD magnet and power supply were nearly completed. (Author).
Author: Bert Zauderer
Publisher:
ISBN:
Category :
Languages : en
Pages : 37
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The completion of a detailed study of electrode conduction led to the selection of thermionically emitting, cesiated tungsten as the most desirable cathode material for closed cycle, MHD generators. It was also found that with a high cesium ion flux at the cathode, electrode currents considerably higher than thermionic levels could be obtained. Finally, it was shown that the cold aerodynamic boundary layer was a major contributor to the electrode losses. Measurements of the gas dynamic performance of the MHD generator under a wide range of load conditions showed good agreement with the MHD generator theory. For the first time anywhere, 8.5% heat to electric conversion was obtained in the MHD generator at 2100K in cesium seeded neon. Based on the above results, a new MHD system consisting of a longer and larger MHD channel and a magnet which was three times more powerful than the previous one was constructed and installed in the shock tunnel facility.
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Category : Aeronautics
Languages : en
Pages : 556
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Author:
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ISBN:
Category : Science
Languages : en
Pages : 818
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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 584
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Author: Oak Ridge National Laboratory
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ISBN:
Category : Electric power distribution
Languages : en
Pages : 2864
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Author: B. Zauderer
Publisher:
ISBN:
Category :
Languages : en
Pages : 19
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An experimental study was performed of the operating characteristics of a large linear, supersonic MHD generator. A shock tunnel was used to heat the test gases, which was primarily a 99 percent neon + 1 percent xenon mixture, to stagnation pressures of 1 to 5 atmospheres, temperatures of about 3500 degrees K, and electron densities on the order of 10 to the power of 10/cc. The test time of 5 milliseconds, which was about 10 times the traversal time of the gas through the generator, was sufficient to produce quasi-steady state conditions in the channel. (Author).
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Category : Nuclear energy
Languages : en
Pages : 1148
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Author:
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ISBN:
Category : Power resources
Languages : en
Pages : 782
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Author:
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ISBN:
Category : Fuel
Languages : en
Pages : 548
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