Rezumat
CZU 536.248.2
DOI https://doi.org/10.52577/eom.2025.61.5.18
The article presents the results of experimental studies of heat transfer during boiling of a dielectric fluid in an electric field on modified surfaces obtained by electrospark alloying. The influence of the electric field strength, electrode shape, inter-electrode distance, heat-transfer surface material, roughness parameters, and other factors on the heat transfer characteristics and the development of the boiling process was studied. A comparative analysis of the influence of the electric field and structural modification of the heat-transfer surface on heat transfer intensity is presented. Heat transfer intensification achieved was up to 3.5 times higher, compared to that at boiling on a smooth surface in the absence of a field. Based on visual observations and high-speed filming, the mechanism of boiling in an electric field on modified surfaces is discussed.
Keywords: heat exchange, boiling, heat flow, temperature difference, heat transfer coefficient, roughness, intensification, electric field.