Radiation heat transfer within an opencycle MHD generator channel
Abstract
Radiation heat transfer in an MHD generator was modeled using the Sparrow and Cess model for radiation in an emitting, absorbing and scattering medium. The resulting general equations can be considerably reduced by introducing simplifying approximations for the channel and MHD gas properties. The simplifications lead to an engineering model, which is very useful for onedimensional channel flow approximation. The model can estimate thermooptical MHD gas properties, which can be substituted in the energy equation. The model considers the contribution of solid particles in the MHD gas to radiation heat transfer, considerable in coalfired closed cycle MHD generators. The modeling is applicable also for other types of flow at elevated temperatures, where radiation heat transfer is an important quantity.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 May 1983
 Bibcode:
 1983STIN...8524267D
 Keywords:

 Magnetohydrodynamic Generators;
 Mathematical Models;
 Radiative Heat Transfer;
 Coal Utilization;
 Conservation Equations;
 Emissivity;
 Gray Gas;
 Heat Transfer Coefficients;
 Particle Production;
 Radiance;
 Smoke;
 Wall Temperature;
 Fluid Mechanics and Heat Transfer