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Wyszukujesz frazę "Niegodajew, P." wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    CFD modelling of CO2 capture in a packed bed by chemical absorption
    Autorzy:
    Asendrych, D.
    Niegodajew, P.
    Drobniak, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/185228.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    carbon dioxide
    carbon capture and storage (CCS)
    2-phase flow
    chemical absorption
    computational fluid dynamics (CFD)
    dwutlenek węgla
    wychwytywanie i składowania dwutlenku węgla (CCS)
    strumień 2-fazowy
    absorpcja chemiczna
    dynamika płynów (CFD)
    Opis:
    The paper deals with numerical modelling of carbon dioxide capture by amine solvent from flue gases in post-combustion technology. A complex flow system including a countercurrent two-phase flow in a porous region, chemical reaction and heat transfer is considered to resolve CO2 absorption. In order to approach the hydrodynamics of the process a two-fluid Eulerian model was applied. At the present stage of model development only the first part of the cycle, i.e. CO2 absorption was included. A series of parametric simulations has shown that carbon dioxide capture efficiency is mostly influenced by the ratio of liquid (aqueous amine solution) to gas (flue gases) mass fluxes. Good consistency of numerical results with experimental data acquired at a small-scale laboratory CO2 capture installation (at the Institute for Chemical Processing of Coal, Zabrze, Poland) has proved the reliability of the model.
    Źródło:
    Chemical and Process Engineering; 2013, 34, 2; 269-282
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of the diagnostic plot in estimation of the skin friction in turbulent boundary layer under an adverse pressure gradient
    Autorzy:
    Niegodajew, P.
    Dróżdż, A.
    Elsner, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/38622693.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Podstawowych Problemów Techniki PAN
    Tematy:
    turbulent boundary layer
    friction velocity
    Clauser-chart
    adverse pressure gradient
    diagnostic plot
    Opis:
    The paper concerns the problem of determining friction velocity in wallbounded flows affected by an adverse pressure gradient (APG). In the work of Niegodajew et al. [22] the corrected Clauser chart method (CCCM) for such flow conditions was proposed. This approach utilises the mean velocity profiles and turbulence intensity profiles to accurately estimate the friction velocity. In another work, Drózdz et al. [27] presented a modified version of the diagnostic-plot scaling (DPS) which allows for direct reconstruction of turbulence intensity profiles based on the local mean velocity profile, even when the flow is affected by a strong pressure gradient. This paper is aimed at verifying whether, when combining both of these methods (i.e. DPS and CCCM), the friction velocity can be accurately determined for APG flow conditions and one can possibly take advantage from both methods. The analysis revealed that the new approach is able to predict the friction velocity with uncertainty less than 5% for all the considered cases for the Clauser–Rotta parameter β < 17. Lastly, DPS-CCCM was also confronted with two empirical approaches (from available literature) allowing for estimation of the friction velocity under APG conditions. The performance of DPS-CCCM was found to be better than the ones of two other empirical approaches.
    Źródło:
    Archives of Mechanics; 2021, 73, 2; 201-215
    0373-2029
    Pojawia się w:
    Archives of Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical analysis of CO2 capture efficiency in post combustion CCS technology in terms of varying flow conditions
    Autorzy:
    Niegodajew, P.
    Asendrych, D.
    Drobniak, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/240433.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    CO2
    CCS
    post-combustion capture
    chemical absorption
    CFD
    absorpcja chemiczna
    Opis:
    The paper deals with the computational fluid dynamics modelling of carbon dioxide capture from flue gases in the post combustion-capture method, one of the available carbon capture and storage technologies. 30% aqueous monoethanolamine solution was used as a solvent in absorption process. The complex flow system including multiphase countercurrent streams with chemical reaction and heat transfer was considered to resolve the CO2 absorption. The simulation results have shown the realistic behaviour and good consistency with experimental data. The model was employed to analyse the influence of liquid to gas ratio on CO2 capture efficiency.
    Źródło:
    Archives of Thermodynamics; 2013, 34, 4; 123-136
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Analysis of Nitrogen Oxides Formation During Oxygen - Enriched Combustion of Natural Gas
    Autorzy:
    Poskart, A.
    Radomiak, H.
    Niegodajew, P.
    Zajemska, M.
    Musiał, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/353857.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    oxygen enhanced combustion
    nitrogen oxides emission
    Opis:
    This paper presents the study of oxygen–enriched combustion of natural gas and its impact on nitrogen oxides emission. The research were performed on two experimental stands, i.e. combustion chambers with an industrial swirl burner of maximum power equal to 90 kW and 10 kW. The investigation includes the influenced of oxygen enhanced within the range between 21% and 30%. Furthermore, the role of temperature during the oxygen enrichment was analysed. The results of the research showed that with the rise in oxygen concentration in the air the concentration of nitrogen oxides also increases what is directly related to the rise in flame temperature as well as the addition of oxygen.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 4; 1925-1930
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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