Two-Phase Hartmann Flows in the MHD Generator Configuration.
Annual rept. Dec 76-Dec 77,
FLORIDA UNIV GAINESVILLE DEPT OF ENGINEERING SCIENCES
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Since the mass density and viscosity of the liquid in a two-phase Faraday generator are much greater than those of the gas, consideration of the liquid phase alone should lead to a good description of force distribution in the generator. Averaging the motion over the liquid phase give us a set of equations which are similar to equations describing a steady flow of a fluid with spatially variable properties. Solutions of these equations are discussed first in the limit of negligible inertia and viscosity, and then in the limit of negligible inertia and non-zero viscosity. The cross stream pinch pressure gradient and its possible effects on the two-phase flow are discussed. The wall region in Faraday generators is a region of very large shear and is important in determining efficient generator operation, as is demonstrated in finite difference calculations carried out under a variety of conditions and also in an analytical boundary layer approximation which has been developed. A section has also been devoted to the possibilities of improved generator efficiency by subpartitioning the generator duct. The last section concerns similitude between two-phase generators and two-phase gravity flows. There are two velocity scales in the systems which must be scaled separately.
- Electric Power Production and Distribution
- Plasma Physics and Magnetohydrodynamics