Twodimensional MHD channel design
Abstract
A twodimensional MHD channel design model was developed for three modes of operation: the velocity, Mach number, and pressure modes. The MHD channel geometry can be predicted, given the distribution of any of these three parameters and the channel aspect ratio. The results for these modes are in excellent agreement with the results obtained with an original design where the area is specified. An arcing model is incorporated in the analysis, which allows MHD channels with cold walls to be rationally analyzed. Calculations indicate doubling of boundary layer voltage drop and 30% increase in wall heat flux as the wall temperature is reduced to 800 K from 1600 K; the two adverse effects combine to reduce channel output by 30%. A onedimensional slag flow model is coupled to the twodimensional flow model. The presence of the slag layer is shown to elevate the apparent wall temperature and thus improve channel performance, especially at lower wall temperatures.
 Publication:

Fluids Engineering in Advanced Energy Systems
 Pub Date:
 1978
 Bibcode:
 1978feae.proc...93D
 Keywords:

 Channel Flow;
 Computer Aided Design;
 Energy Conversion Efficiency;
 Magnetohydrodynamic Flow;
 Two Dimensional Flow;
 Wall Temperature;
 Aspect Ratio;
 Compressible Flow;
 Current Distribution;
 Energy Technology;
 Flow Geometry;
 Mach Number;
 Mathematical Models;
 Performance Prediction;
 Pressure Distribution;
 Turbulent Flow;
 Two Dimensional Models;
 Velocity Distribution;
 Plasma Physics