New results of the study of high-speed quasi-stationary plasma flows interacting with the magnetic field of ring conductors with different currents is presented. The MHD model uses the vector potential of the magnetic field and takes into account the electrical conductivity, thermal conductivity of the medium, as well as radiation transport. The most optimal mode of transformation of kinetic energy into thermal energy of the plasma during the heating and deceleration of the flow in the magnetic field of ring conductors with the increasing values of currents from one coil to another was determined as a result of numerical calculations within the framework of new approach being developed to solve the problem of the controlled thermonuclear fusion.