Accession Number : AD0779698

Title :   Effect of Carbon Dioxide on Electrode Voltage Fall on MHD Generator Performance.

Descriptive Note : Interim rept.,


Personal Author(s) : Du Bro,Gary Arnold

Report Date : OCT 1973

Pagination or Media Count : 90

Abstract : A series of experiments were performed to investigate the effect of carbon dioxide concentration on electrode voltage fall in a simulated MHD generator with an argo-carbon dioxide-potassium plasma. It was observed that increases in carbon dioxide addition resulted in very significant increases in electrode voltage drops. The electrode fall increased with the increase of carbon dioxide concentration, the increase of applied current, and the decrease in electrode temperature. Further, the voltage drops were larger at the cathode than at the anode. Experimental electrical conductivities were also reported. Electric fields were applied with a resulting maximum transverse current density of 0.500 amps/cm squared; molecular additions of up to 5% were injected into the stream. A theoretical model for the electron number density and electric potential was postulated and the results were compared with experimental electrode voltage drops. (Modified author abstract)

Descriptors :   *Magnetohydrodynamic generators, *Electrodes, Voltage, Losses, Carbon dioxide, Performance(Engineering), Electron density, Boltzmann equation, Numerical analysis

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE