Accession Number : AD0746068

Title :   Nonequilibrium Pnenomena in Flowing Plasmas for MHD Power Generation and Propulsion Systems.

Descriptive Note : Progress rept. 15 Feb 71-14 Feb 72,

Corporate Author : STANFORD UNIV CALIF DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Eustis,R. H. ; Kruger,C. H. ; Mitchner,M.

Report Date : MAY 1972

Pagination or Media Count : 7

Abstract : The report discusses progress on work pertaining to non-equilibrium phenomena in flowing plasmas. Measurements of vibration-translation and vibration-vibration relaxation rates in rapid expansions of mixtures of N2 and CO2 in argon have been made. The results generally exceed those measured in shock-heating and laser-fluorescence experiments, and indicate a deficiency in available theory. Experiments have been conducted to investigate the influence of channel size on the ionization instability, in order to provide a means of extending information on small scale devices to predictions for full sized power generators. It was found, for example, that the effective Hall parameter decreased with increasing channel size. A mathematical model has been formulated to predict the effect of N2 addition on the non-equilibrium properties of argon and alkali-metal-seed plasmas. Agreement between calculated and experimental values of electrical conductivity was quite satisfactory. (Author)

Descriptors :   (*PLASMAS(PHYSICS), GAS DISCHARGES), (*MAGNETOHYDRODYNAMIC GENERATORS, PLASMA JETS), SUPERSONIC NOZZLES, SHOCK WAVES, LASERS, NITROGEN, CARBON DIOXIDE, ARGON

Subject Categories : Electric Power Production and Distribution
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE