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Status of power generation experiments in the NASA Lewis closed-cycle MHD facility.In this paper the design and operation of the closed-cycle MHD facility is discussed and results obtained in recent experiments are presented. The main components of the facility are a compressor, recuperative heat exchanger (preheater), heater, nozzle, MHD channel with 28 pairs of thoriated tungsten electrodes, cesium condenser, and an argon cooler. The heater can supply 1.1 MW of thermal power to a 2.27 kg/sec gas stream. The facility has been operated at temperatures up to 2100 K with a cesium-seeded argon working fluid. At low magnetic field strengths (B = 0.2 T), the open circuit voltage, Hall voltage and short circuit current obtained are 90, 69, and 47 percent of the theoretical equilibrium values, respectively. The Hall voltage and short circuit current decrease sharply with increasing magnetic field strength, however. Comparison of these data with a wall and boundary layer leakage theory indicates that the generator has shorting paths in the Hall direction.
Document ID
19720033270
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sovie, R. J.
Nichols, L. D.
(NASA Lewis Research Center Plasma Power Generation Section, Cleveland, Ohio, United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1972
Subject Category
Auxiliary Systems
Report/Patent Number
AIAA PAPER 72-103
Meeting Information
Meeting: American Institute of Aeronautics and Astronautics, Aerospace Sciences Meeting
Location: San Diego, CA
Start Date: January 17, 1972
End Date: January 19, 1972
Sponsors: Science Research Council
Accession Number
72A16936
Distribution Limits
Public
Copyright
Other

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