Browsing by Author "Pertsevyi, Vitalii"
Now showing 1 - 2 of 2
Results Per Page
Sort Options
Item Mathematical Modeling of Heating of Coal Particle Within the Space between Electrodes of Arc-Heating Reactor(EDP Sciences, 2020) Zhevzhyk, Oleksandr; Kholiavchenko, Leonid; Davydov, Serhii; Potapchuk, Iryna; Kabakova, Liudmyla; Gupalo, Olena; Pertsevyi, Vitalii; Morozova, NataliiaEN: A mathematical model of heating of coal particles that move in the initial section of a submerged gas jet within the space between electrodes of reaction chamber of arc-heating reactor is created. The model takes into account convective heat transfer and heat transfer by radiation from a sphere (particle) – circle (anode) system. The temperatures of particles on mechanical trajectory are obtained depending on particle diameters and the initial coordinate of nozzle leaving.Item Mathematical Modeling of Rocks Plasma Disintegration Process at Borehole Reaming(IOP Publishing Ltd, 2023) Potapchuk, Iryna; Zhevzhyk, Oleksandr V.; Kholiavchenko, Leonid; Pertsevyi, Vitalii; Bosyi, Dmytro O.; Drubetskaya, Tanya; Potapchuk, AnnaENG: The mathematical model of thermal disintegration of rocks during the reaming of boreholes, which takes into account the compatibility of the thermogas dynamic problem for a high-temperature heat transfer agent and the thermal problem for the rock heated by this heat transfer agent, has been developed. The mathematical model is based on the laws of conservation of mass, quantity of motion and energy and takes into account the dependences for determining the thermal stresses and the temperature of brittle fracture of rocks. As a result of solving the equations of the mathematical model, the temperature distribution in the rock mass (magnetite quartzite) during heating in the process of borehole plasma reaming and productivity of the borehole plasma reaming process are obtained. Calculated and experimentally determined productivity of the process of plasma reaming of the borehole were compared.