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Wyświetlanie 1-10 z 96
Tytuł:
Study of Tundish Slag Entrainment Using Physical Modelling
Autorzy:
Michalek, K.
Gryc, K.
Socha, L.
Saternus, M.
Tkadlečková, M.
Pieprzyca, J.
Merder, T.
Pindor, L.
Powiązania:
https://bibliotekanauki.pl/articles/353001.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
steelmaking
tundish
slag entrainment
vortex
physical modelling
Opis:
This paper deals with the possibilities of using physical modelling to study the slag entrainment in the tundish. A level of steel in the tundish is changing during sequential continuous casting. The most significant decrease in the steel level occurs when replacing ladles. It is generally known that if the height of steel level in the tundish drops below a certain critical level, it may generate vortexes over the nozzles and as a consequence entrainment of tundish slag into individual casting strands can occur. Thus, it is necessary to identify the critical level of steel for specific operational conditions. In this paper, the development of physical modelling methodology is described as well as physical model corresponding to operational continuous casting machine No. 2 in Třinecké železárny, a.s. The obtained results are discussed.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 1; 257-260
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical modelling of geotechnical structures in ports and offshore
Autorzy:
Bałachowski, L.
Powiązania:
https://bibliotekanauki.pl/articles/259902.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
centrifuge
calibration chamber
CPT
Opis:
The physical modelling of subsoil behaviour and soil-structure interaction is essential for the proper design of offshore structures and port infrastructure. A brief introduction to such modelling of geoengineering problems is presented and some methods and experimental devices are described. The relationships between modelling scales are given. Some examples of penetration testing results in centrifuge and calibration chamber are presented. Prospects for physical modelling in geotechnics are also described.
Źródło:
Polish Maritime Research; 2017, S 1; 4-9
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical Modelling of Degassing Process by Blowing of Inert Gas
Autorzy:
Michalek, K.
Tkadlečková, M.
Socha, L.
Gryc, K.
Saternus, M.
Pieprzyca, J.
Merder, T.
Powiązania:
https://bibliotekanauki.pl/articles/351001.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
physical modelling
refining ladle
inert gas blowing
degassing process
impeller
Opis:
This paper deals with the possibilities of using physical modelling to study the degassing of metal melt during its treatment in the refining ladle. The method of inert gas blowing, so-called refining gas, presents the most common operational technology for the elimination of impurities from molten metal, e.g. for decreasing or removing the hydrogen content from liquid aluminium. This refining process presents the system of gas-liquid and its efficiency depends on the creation of fine bubbles with a high interphase surface, uniform distribution, long period of its effect in the melt, and mostly on the uniform arrangement of bubbles into the whole volume of the refining ladle. Physical modelling represents the basic method of modelling and it makes it possible to obtain information about the course of refining processes. On the basis of obtained results, it is possible to predict the behaviour of the real system during different changes in the process. The experimental part focuses on the evaluation of methodical laboratory experiments aimed at the proposal and testing of the developed methods of degassing during physical modelling. The results obtained on the basis of laboratory experiments realized on the specific physical model were discussed.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 2; 987-992
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical Modelling of Tundish Slag Entrainment under Various Technological Conditions
Autorzy:
Michalek, K.
Gryc, K.
Socha, L.
Tkadlečková, M.
Saternus, M.
Pieprzyca, J.
Merder, T.
Pindor, L.
Powiązania:
https://bibliotekanauki.pl/articles/351348.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
steelmaking
tundish
slag entrainment
flow pattern
physical modelling
Opis:
This paper deals with the issue of physical modelling of vortexes creation and tundish slag entrainment over the mouth of the nozzle into the individual casting strands. Proper physical model is equivalent to the operational continuous casting machine No. 2 in TŘINECKÉ ŽELEZÁRNY, a.s. Physical modelling methodology and simulated operational conditions are shortly described. Physical modelling was used for the evaluation of current conditions of steel casting at the application of different impact pads in the tundish. Further, laboratory measurement on the physical model aiming the determination of exact critical periods of vortexes creation and study of the slag entrainment as a consequence of changes in surface level during the tundish refilling to standard level were realised. The obtained results were analysed and discussed.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 3; 1467-1471
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical modelling of water flow in "Wild River" type water slide
Autorzy:
Burzyński, K.
Szydłowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/241202.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Opis:
The results of physical modelling of water flow in `Wild River' type slide are presented. The hydraulic investigation concerns the water slide being a component of `Świat Wodny Nemo' water-pool complex in Sopot. The laboratory tests were carried out on a model of the slide installed in the Laboratory of Hydro and Environmental Engineering of the Gdańsk University of Technology. Generally, the water flow observed in the open channel and reservoir system can be classified as steady and rapidly varied. The large number of local, hydraulic effects was observed along the whole slide track due to strongly varying bottom slopes and curvatures of channel bends.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2002, 49, 4; 37-54
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wind-caused air transport through greenhouse screens: a physical modelling approach
Autorzy:
Miguel, A F
Powiązania:
https://bibliotekanauki.pl/articles/26494.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
porous screen
air transport
screen
greenhouse
climate control
physical model
air exchange
wind pressure
Źródło:
International Agrophysics; 1999, 13, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of RTD Curves for Aluminium Refining Process Conducted in Batch Reactor – Physical Modelling
Autorzy:
Saternus, M.
Powiązania:
https://bibliotekanauki.pl/articles/354307.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminium refining
barbotage
physical modelling
RTD curves
Opis:
It is really hard to determine the phenomena occurring during aluminum refining process using argon blowing through the liquid metal in industrial conditions. The solution of such problem is physical modelling. This kind of modelling gives possibility to determine the level of dispersion of the refining gas in liquid metal. Especially in steel metallurgy RTD (Residence Time Distribution) analysis and visualization process with some colour tracer, which can give extra information about time of mixing are very popularly used. Because the modelling research (especially visualization) is pictorial, the research was conducted to check if it is possible to estimate quantitatively impeller working effectiveness basing on determination of the RTD curves. The examined object was model of URO-200 batch refining reactor. The RTD curves was registered and discussed for three different impellers and four different variants of processing parameters (rotary impeller speed: 300-500 rpm, and gas flow rate: 15-20 l·min-1). Additionally, the process of mixing of the inert gas with water as a modelling agent was enabled to be observed due to introduction of colour tracer (KMnO4). Results obtained from both measuring methods were graphically presented, compared and shortly discussed.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 1909-1914
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Optimization Parameters on the Efficiency of Aluminium Melt Refining by using Physical Modelling
Autorzy:
Walek, Josef
Michalek, Karel
Tkadlečková, Markéta
Powiązania:
https://bibliotekanauki.pl/articles/2174623.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
physical modelling
refining ladle
blowing of inert gas
degassing of the melt
impeller
modelowanie fizyczne
kadź rafinacyjna
wdmuchiwanie gazu obojętnego
odgazowanie stopu
wirnik
Opis:
The article describes the influence of optimization parameters on the efficiency of aluminium melt refining by using physical modelling. The blowing of refining gas, through a rotating impeller into the ladle is a widely used operating technology to reduce the content of impurities in molten aluminium, e.g. hydrogen. The efficiency of this refining process depends on the creation of fine bubbles with a high interphase surface, wide-spread distribution, the residence time of its effect in the melt, and mostly on the wide-spread dispersion of bubbles in the whole volume of the refining ladle and with the long period of their effect in the melt. For physical modelling, a plexiglass model on a scale of 1:1 is used for the operating ladle. Part of the physical model is a hollow shaft used for gas supply equipped with an impeller and also two baffles. The basis of physical modelling consists in the targeted utilization of the similarities of the processes that take place within the actual device and its model. The degassing process of aluminium melt by blowing inert gas is simulated in physical modelling by a decrease of dissolved oxygen in the model liquid (water).
Źródło:
Archives of Foundry Engineering; 2022, 22, 3; 60--66
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical Modelling of the Steel Flow in RH Apparatus
Modelowanie fizyczne przepływu stali w urządzeniu RH
Autorzy:
Pieprzyca, J.
Merder, T.
Saternus, M.
Michalek, K.
Powiązania:
https://bibliotekanauki.pl/articles/356316.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
steel
vacuum degassing
RH apparatus
physical modelling
stal
odgazowanie próżniowe
urządzenie RH
modelowanie fizyczne
Opis:
he efficiency of vacuum steel degassing using RH methods depends on many factors. One of the most important are hydrodynamic processes occurring in the ladle and vacuum chamber. It is always hard and expensive to determine the flow character and the way of steel mixing in industrial unit; thus in this case, methods of physical modelling are applied. The article presents the results of research carried out on the water physical model of RH apparatus concerning the influence of the flux value of inert gas introduced through the suck legs on hydrodynamic conditions of the process. Results of the research have visualization character and are presented graphically as a RTD curves. The main aim of such research is to optimize the industrial vacuum steel degassing process by means of RH method.
Skuteczność procesu próżniowego odgazowania stali metodą RH zależy od wielu czynników. Jednym z ważniejszych są procesy hydrodynamiczne zachodzące w kadzi stalowniczej i komorze próżniowej. Określenie sposobu przepływu i mieszania się stali w urządzeniu przemysłowym jest bardzo trudne i kosztowne. W związku z tym do tego celu wykorzystuje się m. in. metody modelowania fizycznego. W artykule przedstawiono rezultaty badań przeprowadzonych na wodnym modelu fizycznym urządzenia RH, dotyczące wpływu wartości strumienia gazu obojętnego wprowadzanego przez dysze króćca ssącego na warunki hydrodynamiczne procesu. Wyniki badań mają charakter wizualizacji oraz przedstawione zostały w postaci krzywych retencji RTD. Cel tego typu badań związany jest z optymalizacją przemysłowego procesu próżniowego odgazowania stali metodą RH.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 3A; 1859-1863
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical Modelling of the Production of an Alloy Vapour Source for the Synthesis of Dielectric Material
Autorzy:
Nadolski, M.
Stradomski, G.
Zdunek, K.
Okrasa, S.
Powiązania:
https://bibliotekanauki.pl/articles/355587.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum-silicon alloy
magnetron sputtering processes
gravity casting
die casting
Opis:
The paper reports the results of a physical modelling study of the production of a hypereutectic aluminium alloy to be used formaking an alloy vapour source for operation in the magnetron. Within the study, targets from a hypereutectic aluminium-silicon alloy were made in laboratory conditions. Thus obtained material was subjected to heat treatment, porosity analysis, and the assessment of the microstructure and fitness for being used in the magnetron. The process of melting the hypereutectic Al-Si alloy was carried out at the Department of Foundry of the Czestochowa University of Technology. The investigation into the production of the alloy vapour source for the synthesis of the dielectric material from the hypereutectic aluminium alloy has confirmed.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 1; 201-206
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 96

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