HEAT TRANSFER IN THE ANODE REGION IN PLASMA-ELECTROLYTIC HEATING OF A CYLINDRICAL SAMPLE

The energy balance in a three-phase system "anode–vapor/gas envelope–electrolyte" and the results of experimental determination of the heat fl uxes acting in the vapor–gas envelope are considered. To determine the fl uxes quantitatively, the calorimetric method and the theory of inverse problems of the thermal conductivity of solid bodies are used. It is shown that heat fl uxes into the anode and electrolyte increase with the voltage delivered to the electrochemical cell, whereas the heat fl ux associated with the vapor release to the atmosphere remains practically unchanged. An increase in the concentration of the current-conducting component in the electrolyte leads to a certain growth of the heat fl ux into the anode and to a decrease of the fl ux into the electrolyte. The stages of a nonstationary period of the process of plasma-electrolytic heating have been revealed, and it has been established that the time of heating the
vapor–gas envelope is several times shorter than the time of heating a sample.
   
Author:  A. V. Zhirov, P. N. Belkin, and S. Yu. Shadrin
Keywords:  plasma-electrolytic heating, heat fl uxes, inverse heat conduction problem
Page:  862