Browsing by Author "Havryliv, Roman"

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CFD-modeling of gas combustion process in the industrial cyclonecalciner furnace
(Lviv Polytechnic Publishing House, 2015) Benko, Roman; Havryliv, Roman; Maystruk, Volodymyr; Lviv Polytechnic National University
The computer model that enables to investigate the work of cyclone-calciner furnace for the heating up regime has been developed. Simulation carried out in ANSYS FLUENT 15.0. The temperature field and species concentration were obtained. The work results provide important data to further study the efficiency of the limestone thermal decomposition chemical reactions and optimizing furnace design and operation modes.
Development of combustion model in the industrial cyclone-calciner furnace using cfd-modeling
(Lviv Politechnic Publishing House, 2017-01-20) Havryliv, Roman; Maystruk, Volodymyr; Lviv Polytechnic National University
Розроблено тривимірну комп’ютерну мо- дель для дослідження процесу горіння в промисловій циклонній печі-декарбонізаторі. Моделювання руху потоків виконано на основі RANS-підходу з використанням різних моделей турбу- лентності. Представлені результати дають можливість спрогнозувати розподіл температури в печі, визначити кон- центрації компонентів в газовій фазі та добре узгоджуються з експериментальними даними. Дані отримані на основі комп’ютерного моделювання будуть використані в наступних теоретичних та експериментальних дослідженнях для опти- мізації конструкції апарату.
Kinetics of polymer dispersion drying dy the conductionmethod
(Видавництво Львівської політехніки, 2017-12-23) Yakubik, Vitaliy; Zayats, Serhiy; Havryliv, Roman; Lviv Polytechnic National University
The effects of conduction heating at the drying surface temperatures ranging from 50° to 90°C for thin layer conduction drying of polymer dispersion were studied. Results show that polymer dispersion at 52 percent initial moisture contants dried initially under constant rate period for a very short time and then dried under falling rate period. The empirical drying equations, developed before for the above drying conditions can be used to predict the drying time with fairly good accuracy.
Kinetics study of the finely dispersed limestone thermal decomposition reaction
(Lviv Polytechnic Publishing House, 2016) Filias, Svitlana; Havryliv, Roman; Maystruk, Volodymyr; Lviv Polytechnic National University
Termogravimetric studies on four various fractions diameters particles of calcium carbonate used in the industrial cyclone-calciner furnace for manufacturing of lime were carried out based on linear increase of the temperature. The values of activation energy E, preexponential factor A in Arrhenius equation, as well as the mechanism of the particles thermal decomposition reaction were defined. The work results provide important data to further study the efficiency of the limestone thermal decomposition chemical reactions and optimizing furnace design and operation modes.