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EXPERIMENTAL PERFORMANCE OF TWO SEGMENTED WALL MAGNETOHYDRODYNAMIC ELECTRIC POWER GENERATORS
TENNESSEE UNIV SPACE INST TULLAHOMA
A test program was conducted for the University of Tennessee Space Institute on a vertically segmented wall Hall and a diagonally segmented wall 45-deg magnetohydrodynamic generator. The generators were 48 in. in length and had inside dimensions of 2 in. in width, diverging from 4 in. in height at the channel inlet to 6 in. in height at the channel exit. The plasma was provided by a gaseous oxygenRP-1 combustor with a Mach number 1.6 nozzle. The propellants were seeded with potassium hydroxide dissolved in ethyl alcohol to produce a high ion concentration in the exhaust stream. The generated power was dissipated through a resistor load bank with a variety of parallel and series resistance configurations. Operation conditions varied as follows combustor chamber pressure 39 to 48 psia, KOH concentration to 1.3 percent of total propellant weight flow, magnetic field to 20,000 gauss, and load bank resistance from 2.5 to 27 ohms. Tabulations of combustor performance and of the electrical, pressure, and temperature data from the two generator configurations are presented.
Prepared in cooperation with ARO, Inc., Tullahoma, Tenn.
Approved for public release; distribution is unlimited.