http://eadnurt.diit.edu.ua/jspui/handle/123456789/688 RU: Статьи <br> EN: Articles 2022-03-20T06:27:30Z http://eadnurt.diit.edu.ua/jspui/handle/123456789/14077 Название: Reducing of Coal Dust Release from Train Wagon with Barrier Авторы: Biliaiev, Mykola M.; Biliaieva, Viktoriia V.; Kozachyna, Vitalii A.; Berlov, Oleksandr V.; Oladipo, Mutiu Olatoye; Kirichenko, Pavlo S. Краткий осмотр (реферат): EN: Intensive environment pollution takes place during coal transportation in open wagons. Emission of coal dust from the coal wagons cause contamination of atmosphere and territory adjacent to the railway track. Different ways to reduce coal dust emission from the wagon are used in the world. Unfortunately, in Ukraine, this problem is far from solution and there is no serious research work in this field. The aim of this work was laboratory study of coal dust emission from the wagon model which had different barriers installed on the wagon. Laboratory experiments were carried for coal wagon without barrier and for coal wagon which had barriers of two types. Barrier of the first type had downwind wing. Barrier of the second type had upwind wing. The contamination zones, concentration near the model were studied. The obtained results illustrate that installation of barriers influence intensity of transport corridor contamination. Also a numerical model was developed to estimate wind flow and coal dust dispersion from the coal wagon. Equation of potential flow and equation of coal dust dispersion were used. Implicit difference schemes of splitting were used for numerical simulation of governing equations. Results of numerical experiment, which were performed, are presented. Описание: M. Biliaiev: ORCID 0000-0002-1531-7882, V. Biliaieva: ORCID 0000-0003-2399-3124, V. Kozachyna: ORCID 0000-0002-6894-5532; O. Berlov: ORCID 0000-0002-7442-0548, М. Oladipo: ORCID 0000-0001-7945-6657, P. Kirichenko: ORCID 0000-0002-0793-9593 2020-01-01T00:00:00Z http://eadnurt.diit.edu.ua/jspui/handle/123456789/14076 Название: Mathematical Modeling of Shock Wave Interaction with Wagon Авторы: Khrutch, V. K.; Biliaiev, Mykola M.; Kozachyna, Vitalii A.; Berlov, Oleksandr V.; Kirichenko, Pavlo S.; Biliaieva, Viktoriia V. Краткий осмотр (реферат): EN: In case of some accidents on railways there may be situations when the shock wave appears and interacts with different objects on the railway (wagons, cargo, buildings etc.). In these cases it is necessary to predict the possible effect of shock wave diffraction on the different objects. Study of these problems on the basis of physical experiments (laboratory experiment or field experiment) demand expensive and unique experimental facility. In some cases physical experiment can’t be set. That is why mathematical simulation plays the important role in solving problem connected with shock wave propagation. For practice it is necessary to have predictive quick computing mathematical models which allow to perform numerical experiment on the basis of non-powerful computers. Now, in Ukraine, there is a real deficit of mathematical models which allow to compute quickly shock wave interaction with different objects. The aim of this work was development of quick computing numerical model to simulate shock wave propagation and its interaction with the wagons. The model is based on the numerical integration of Euler equations which are written in integral form. To solve modeling equations difference scheme of splitting was used. Results of numerical modeling are presented. Описание: P. Kirichenko: ORCID 0000-0002-0793-9593,V. Biliaieva: ORCID 0000-0003-2399-3124, V. Kozachyna: ORCID 0000-0002-6894-5532; O. Berlov: ORCID 0000-0002-7442-0548, M. Biliaiev: ORCID 0000-0002-1531-7882 2020-01-01T00:00:00Z http://eadnurt.diit.edu.ua/jspui/handle/123456789/14071 Название: Simulation of Environmental Pollution from Diesel Locomotive Авторы: Biliaiev, Mykola M.; Rusakova, Tetiana I.; Kozachyna, Vitalii A.; Berlov, Oleksandr V.; Poltoratskа, Viktoriia; Yakubovska, Zinaida M. Краткий осмотр (реферат): EN: Diesel locomotives are widely used at Ukrainian railway stations as maneuvering locomotives. Emissions from these diesel locomotives contain different toxic chemicals. It is important to understand air contamination patterns which are formed at railway stations. Understanding of these contamination patterns allows to evaluate the negative impact of diesel locomotive emissions on environment. To solve this problem it is necessary to use mathematical models which take into account the most important factors influencing formation of contamination zones. This paper introduces numerical model which allows to simulate pollutants dispersion from moving diesel locomotive. Developed numerical model is based on three dimensional equation of potential flow and three dimensional equation of pollutant dispersion. The model takes into account pollutants (NO, NO2) chemical transformation. To solve three dimensional equation of potential flow the implicit difference scheme of splitt ing was used. To solve three dimensional equation of pollutant dispersion the implicit difference scheme of splitting was used. Euler method was used to solve numerically equations of pollutant chemical transformation. Developed numerical model allows to take into account influence of buildings at the railway station on the contamination zones formation. Developed model consumes not much computer time. Results of performed numerical experiment are presented. Описание: M. Biliaiev: ORCID 0000-0002-1531-7882, T. Rusakova: ORCID 0000-0001-5526-3578, V. Kozachyna: ORCID 0000-0002-6894-5532; O. Berlov: ORCID 0000-0002-7442-0548 2020-01-01T00:00:00Z http://eadnurt.diit.edu.ua/jspui/handle/123456789/13915 Название: Computing Model for Simulation of the Pollution Dispersion Near the Road with Solid Barriers Авторы: Biliaiev, Mykola M.; Pshinko, Oleksandr M.; Rusakova, Tetiana I.; Biliaieva, Viktoriia V.; Sładkowski, Aleksander Краткий осмотр (реферат): EN: In this study, a numerical model is proposed for calculating pollution zones near the road, taking into account the geometry of the automobile transport, meteorological conditions, the location of the barriers and their height, and the chemical transformation of nitrogen oxides in the atmospheric air. The numerical solution is based on the integration of the mass transfer equations using the finite-difference method. To determine the components of the air flow velocity vector, a two-dimensional model of the potential flow is used, where the Laplace equation for the velocity potential is the modeling equation. Based on this numerical model, a software package has been developed that allows computational experiments and does not require large expenditures of computer time. Based on the results obtained, an assessment was made of the effectiveness of the use of barriers to reduce the level of air pollution near highways. It has been established that the use of barriers of different heights reduces the level of pollution behind the road by approximately 20-50%. Описание: M. Biliaiev: ORCID 0000-0002-1531-7882; O. Pshinko: ORCID 0000-0002-1598-2970; T. Rusakova: ORCID 0000-0001-5526-3578; V. Biliaieva: ORCID 0000-0003-2399-3124 2021-01-01T00:00:00Z