IEEJ Transactions on Power and Energy
Online ISSN : 1348-8147
Print ISSN : 0385-4213
ISSN-L : 0385-4213
Effect of Nozzle Load Resistance and Stagnation Gas Pressure on Performance of Disk MHD Generator with Small Area Ratio
Junji MasudaSyunsuke ToriiMasashi TutsumiNoritaka OdaYoshihiro OkunoHiroyuki Yamasaki
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2000 Volume 120 Issue 6 Pages 864-872

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Abstract

An experimental study on performance of a disk MHD generator was carried out using a shock-tube driven facility. Effects of nozzle load resistance and stagnation gas pressure on the enthalpy extraction, the total pressure ratio and the adiabatic efficiency were investigated for the disk MHD generator with a small area ratio. The enthalpy extraction and the adiabatic efficiency were found to be affected by the nozzle load resistance. The result has suggested that the nozzle load resistance should be kept high for high performances of the disk MHD generator with the small area ratio. Furthermore, an increase of stagnation pressure resulted in a slight increase of enthalpy extraction. However, the increase of stagnation pressure led to a remarkable increase of adiabatic efficiency. The increase of the adiabatic efficiency was due to an increase of total pressure ratio. Effects of the electrical efficiency, the Mach number and loss parameters for heat and friction on the total pressure ratio were discussed. The discussion has suggested that the increase of total pressure ratio is ascribed to a relative decrease of pressure loss due to wall friction. In addition, the highest adiabatic efficiency for cesium seeded argon was achieved in the present experiment without an introduction of inlet swirl.

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© The Institute of Electrical Engineers of Japan
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