Bereziuk A. Electromagnetic and thermal processes in induction installations for heat transfer fluids.

The Thesis is devoted to the development of method for calculating electromagnetic and thermal fields of cylindrical inductors, which are loaded by a bundle of rods or pipes, taking into account nonlinear properties of ferromagnetic load and finite length of the inductor. In this thesis the analysis of modern methods calculation and simulation of electromagnetic and thermal processes in induction heating was conducted. Based on the analysis of the desirability of developing calculation method finite length cylindrical inductors which are loaded by a bundle of rods or pipes was justified. Combined numerical and analytical mathematical model for calculating the electromagnetic and thermal fields of the cylindrical inductor which is loaded by a bundle of ferromagnetic rods or pipes at power inductor from the voltage source has been developed. The problem of calculating the electromagnetic field is reduced to the solution of the boundary problem in finite bounds for selected areas with different physical properties and coordination of the solutions at the boundaries. The problem of calculating the temperature fields in the ferromagnetic branched load is reduced to determining the distribution of thermal fields in a single load element and subsequent distribution solutions for all volume of load. Induction heating equipment for heat intermediate materials, with using a heat exchange surface as a leaky located of bundle ferromagnetic rods of small diameter, has been developed. Comparison of experimental and theoretical results confirms the high accuracy of the developed theoretical method calculation of cylindrical inductors, which are loaded by a bundle of rods or pipes.