Статті та доповіді ФМФІТ, фізичні науки
Постійне посилання зібрання
Переглянути
Нові надходження
Документ Study of high-temperature heat-mass transfer of two-fraction gas suspensions and individual carbon particles in heated air(2024) Orlovska, Svitlana G.; Zui, Oksana M.; Орловська, Світлана Георгіївна; Зуй, Оксана МиколаївнаIn the work, the regularities of high-temperature heat-mass exchange in two-fraction gas suspensions of carbon particles in heated air are studied. These studies are relevant for predicting high-temperature processes in combustion chambers and determining the main characteristics of these processes: induction period, time and temperature of combustion, critical parameters of ignition and extinction. Physico-mathematical modeling of the problem is carried out on the basis of the equations of heat and mass transfer and chemical kinetics for the components of the gas suspension, taking into account the molecular-convective and radiation mechanisms of heat transfer. The characteristics of ignition, burning, and extinction of a two-fraction gas suspension of carbon particles with equal mass concentrations of small (60 μm) and large (120 μm) fractions in the temperature range of 1100 ÷ 1500 K were studied; a comparison was made with the characteristics for single particles of the corresponding diameters. It has been proven that when the gas temperature decreases, the induction period of the fine fraction can exceed the induction period of the large fraction, while the combustion temperature of small particles becomes lower than the combustion temperature of large particles. At high gas temperatures (1400 K, 1500 K), the situation changes to the opposite. The critical ignition and extinction parameters of two-fraction gas suspensions (gas temperatures, particle diameters) were found.Документ Исследование высокотемпературного окисления углеродных частиц с различной пористостью(2012) Орловская, Светлана Георгиевна; Калинчак, Валерий Владимирович; Зуй, Оксана Николаевна; Орловська, Світлана Георгіївна; Калінчак, Валерій Володимирович; Зуй, Оксана Миколаївна; Orlovska, Svitlana G.; Kalinchak, Valerii V.; Zui, Oksana M.В настоящей работе изучалось влияние внутреннего реагирования в порах углеродной частицы на высокотемпературный тепломассообмен и кинетику окисления в нагретом воздухе.