Accession Number : AD0784288

Title :   Large Enthalpy Extraction Experiments in a Non-Equilibrium Magneto-Hydrodynamic Generator,

Corporate Author : GENERAL ELECTRIC CO PHILADELPHIA PA SPACE DIV

Personal Author(s) : Marston,C. ; Tate,E. ; Zauderer,B.

Report Date : 29 JUL 1974

Pagination or Media Count : 13

Abstract : A measure of the performance of a magnetohydrodynamic (MHD) generator is the power out/heat in (enthalpy extraction) which must exceed 20% to provide efficient operation in a thermodynamic Brayton, power cycle. For the first time 19.3% enthalpy extraction has been achieved in a supersonic MHD generator operating under non-equilibrium plasma conditions. The power output was 1.82 megawatts. The test gas was cesium seeded neon heated to a temperature of 3520K in a shock tunnel. The MHD channel had an area ratio of six to one and seventy-one pairs of electrodes. The electrodes were at room temperature. Theoretical calculations show that if thermionically emitting electrodes were used, 30% enthalpy extraction could be obtained.

Descriptors :   *Magnetohydrodynamic generators, *Nonequilibrium flow, *Enthalpy, Shock tubes, Cesium, Electric power production, Performance, Efficiency

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE