Abstract
In algorithms and programs for calculating the temperature field of a thermionic field element, the cross section of the element is considered on the basis of the model of solid coaxial cylinder. In a real fuel element, however, the emitter-collector system is nonaxisymmetric because of the waviness and ovality of the surfaces, the emitter is eccentric relative to the collector, and the volume heat release in the fuel of the element is nonaxisymmetric. The distributions of the temperature and the heat fluxes transmitted through the emitter-collector system with allowance for these factors can be found only by using two-dimensional (cross-sections) methods of fuel-element calculation. In this paper, the authors report the results from the calculation of the temperature field in a thermionic fuel element with emitter-collector eccentricity and nonaxial symmetry of the volume heat release in the fuel with allowance for the thermomechanical deformations caused by that field. For the calculations, a two-dimensional program of thermo-physical fuel-element calculation, based on the method of finite elements, was adapted for this problem.
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