
Accession Number : AD0431895
Title : EFFECT OF ELECTRODE NONUNIFORMITIES ALONG THE MAGNETIC FIELD IN MHD GENERATORS,
Corporate Author : AVCO EVERETT RESEARCH LAB EVERETT MASS
Personal Author(s) : Fishman,Frank J. ,Jr.
Report Date : NOV 1963
Pagination or Media Count : 18
Abstract : The current distribution in an MHD channel with a working fluid characterized by a tensor electrical conductivity is computed for electrodes that are finely segmented in the flow direction but do not extend entirely across the channel. Fundamentally, this electrode geometry increases the normal internal impedance of the channel by an amount that is proportional to the aspect ratio of the channel, the quantity, and a factor that increases monotonically with the ratio of channel width to electrode width. The circuit characteristics as well as the efficiency characteristics of both normal current generatorb and Hall current generators based on this channel are worked out. The effects of electrodes segmented coarsely in the magnetic field direction, but finely along the flow, are deduced fromy the fundamental solution. A comparison with the effects of coarse segmentation along the flow indicates that these latter nonuniformities may be more than four times as effective in increasing the channel impedance. (Author)
Descriptors : (*MAGNETOHYDRODYNAMICS, GENERATORS), (*ELECTRODES, MAGNETIC FIELDS), PLASMAS(PHYSICS), ELECTRICAL CONDUCTIVITY, HALL EFFECT, CONFORMAL MAPPING, CIRCUITS, INTEGRAL TRANSFORMS, TRANSPORT PROPERTIES, FLUID FLOW, ELECTRICAL IMPEDANCE
Distribution Statement : APPROVED FOR PUBLIC RELEASE