Results obtained in NASA Lewis closed-cycle magnetohydrodynamic power generation experiments
Closed cycle magnetohydrodynamic power generators with two channels
Nichols, L. D.↗
Engineering topics
Sovie, R. J.
Publications and source records attributed to Sovie, R. J..
Status of power generation experiments in the NASA Lewis closed cycle MHD facility
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, heater, nozzle, MHD channel with 28 pairs of thoriated tungsten electrodes, cesium condenser, and an argon cooler. The facility has been operated at temperatures up to 2100 K with a cesium-seeded argon working fluid. At low magnetic field strengths, the open circuit voltage, Hall voltage and short circuit current obtained are 90, 69, and 47 percent of the theoretical equilibrium values, respectively. Comparison of this data with a wall and boundary layer leakage theory indicates that the generator has shorting paths in the Hall direction.
Sovie, R. J.↗
Performance and diagnostics of a water-cooled magnetoplasmadynamic arc thruster
Performance of magnetoplasmadynamic arc thrustor
Connolly, D. J.↗
Results of initial subsonic tests in the NASA-Lewis closed loop MHD generator
NASA-Lewis closed loop MHD low temperature power generator, describing systems performances during subsonic tests
Nichols, L. D.↗
Effect of background pressure on magnetoplasmadynamic thruster operation
Background pressure and magnetic field shape effect on MPD thrustor performance, testing radiation cooled thrustors
Connolly, D. J.↗
Results of initial subsonic tests in the NASA-Lewis closed loop MHD generator
NASA Lewis closed loop MHD generator subsonic tests, discussing ducts, purge and Cs injection systems, electrode coating, etc
Nichols, L. D.↗
Performance of radiation-cooled magnetoplasmadynamic arc thrusters
Performance of radiation cooled magnetoplasmadynamic arc thrustors
Connolly, D. J.↗
A study of the axial velocities in an ammonia MPD thruster.
Axial velocities in ammonia MPD thrustor exhaust by measuring Doppler shifts of spectral lines emitted by plasma constituents
Connolly, D. J.↗
The effect of background pressure and magnetic field shape on MPD thruster performance.
Background pressure and magnetic field shape effect on MPD thrustor performance, testing radiation cooled thrustors
Connolly, D. J.↗
Low environmental pressure MPD arc tests.
Lithium and ammonia MPD arc thrustors tests in low environmental pressure
Burkhart, J. A.↗
The effects of cascading and metastable atoms on the determination of electron temperature from relative line intensities in a tenuous helium plasma.
Cascading and electron-metastable atom interactions effects on electron temperature determination from spectral lines of helium plasma
Sovie, R. J.↗
Radio-Frequency Induction Heating of Low- Pressure Plasmas
Ohmic power dissipation and energy storage in radio frequency heated low pressure helium plasma
HELIUM PLASMA↗
Volume ion production costs in tenuous plasmas - A general atom theory and detailed results for helium, argon, and cesium
General atom theory for volume ion production cost and rate in tenuous plasma having Maxwellian distribution of electron energies - detailed results for argon, cesium and helium gases
ION PRODUCTION↗
Low environmental pressure MPD arc tests.
Lithium and ammonia MPD arc thrustors tests in low environmental pressure
PROPULSIVE EFFICIENCY↗
Radio Frequency Induction Heating of Low Pressure Plasmas
RF induction heating and production of low pressure plasmas, discussing plasma electron density function
PLASMA HEATING↗
Effects of metastable atoms on volume ion production in a tenuous helium plasma
Excitation and ionization cross sections used to calculate effect of electron-metastable atom interactions on volume ion production processes in steady state helium plasma
HELIUM PLASMA↗
Energy required for ion production by electron bombardment in helium, argon, and cesium.
Energy cost of ion production for atomic helium, argon and cesium calculated by excitation and ionization cross sections
RARE GAS↗
Spectroscopic determination of electron temperature and percentage ionization in a helium plasma.
Spectroscopic determination of electron temperature and percentage ionization in helium plasma
PLASMA SPECTRUM↗