Accession Number : AD0685529

Title :   CALCULATION OF THE BOUNDARY LAYER AT THE ELECTRODE OF AN MHD GENERATOR OF VARIABLE CROSS SECTION,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Yakubenko,A. E.

Report Date : 26 AUG 1968

Pagination or Media Count : 20

Abstract : The paper gives a calculation of the boundary layer forming at the electrodes during the flow of the electrically conducting gas in an MHD generator duct, with a uniform magnetic field parallel to the electrodes and perpendicular to the flow. It is assumed that the inter-electrode distance changes linearly along the flow. If the boundary layers are assumed to be fairly thin and their electrical resistance is ignored, the flow in the region outside the boundary layer may be regarded as independent of that within it. The region outside the boundary layer will henceforth be referred to as the central region of the flow. On the basis of the assumptions made, the central region of the flow was calculated using a one-dimensional theory, ignoring the viscosity and thermal conductivity of the gas. The calculations were performed with an electrical conductivity coefficient dependent on temperature according to an exponential law. The calculations yielded figures for the dependence of the dynamic and thermodynamic characteristics of the flow in the central region on the co-ordinates along the axis of the duct, under conditions of a given pressure drop between the receiver and the outlet section of the duct, and for various values of the load parameter and the electrode aperture angle. These characteristics were used as boundary conditions in calculating the flow in the boundary layer near the electrodes. In the boundary layer flow calculations use was made of a boundary layer magnetohydrodynamic equation at low Reynolds numbers. (Author)

Descriptors :   (*MAGNETOHYDRODYNAMIC GENERATORS, ELECTRODES), (*ELECTRODES, *BOUNDARY LAYER), ELECTRICAL CONDUCTIVITY, DUCTS, THERMODYNAMICS, REYNOLDS NUMBER, EQUATIONS OF MOTION, USSR

Subject Categories : Electric Power Production and Distribution

Distribution Statement : APPROVED FOR PUBLIC RELEASE