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Wyszukujesz frazę "Uilhoorn, Ferdinand" wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Numerical discrepancies of using a nonconservative formulation of the compressible gas flow model
    Autorzy:
    Uilhoorn, Ferdinand E.
    Powiązania:
    https://bibliotekanauki.pl/articles/122878.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    shock phenomenon
    TVD-MUSCL
    WENO-Z
    numerical error
    system gazociągów
    zjawisko szoku
    błąd numeryczny
    Opis:
    In this article, we investigated the shock phenomenon in gas pipeline systems. We particularly address the numerical discrepancies introduced when using a primitive variable-based formulation of the compressible gas flow model. For the analysis, we compared two different schemes, namely, van Leer’s second-order Monotonic Upstream-centered Scheme for Conservation Laws scheme (TVD-MUSCL) together with Roe’s superbee slope limiter and the fifth-order accurate finite volume weighted essentially non-oscillatory scheme (WENO5-Z). For the numerical flux, we implemented the Rusanov solver. The time stepping was done with a strong stability preserving Runge-Kutta method. The method of manufactured solutions was used to verify the code accuracy. Based on a series of numerical experiments, we showed that the local errors become more visible if we use the WENO5-Z reconstruction.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2019, 18, 4; 101-113
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A data assimilation approach for estimating strength of steel pipes reinforced with composite sleeves under unsteady pressure-flow conditions
    Autorzy:
    Witek, Maciej
    Uilhoorn, Ferdinand
    Powiązania:
    https://bibliotekanauki.pl/articles/1845453.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pipe wall metal loss
    composite sleeve
    pipe fracture
    gas dynamics
    data assimilation
    Opis:
    The aim of this paper is twofold: to estimate the unsteady pressure-flow variations in gas transmission pipelines using the ensemblebased data assimilation approach and to analyse the strength of steel tubes reinforced with composite sleeves containing localized part-wall thickness loss caused by corrosion while taking into consideration a safe operating pressure of the pipeline. For a steel thin-walled cylinder containing a partwall metal loss, a flexible wrap of fibreglass as well as carbon glass with epoxy resin are determined. The strength of the repaired pipeline with two kinds of materials for sleeves is investigated taking into consideration the internal pressure at the defect location. For the case study, a section of the Yamal transit pipeline on the Polish territory is selected. The results enable pipeline operators to evaluate the strength of corroded steel pipelines and develop optimal repair activities, which are of vital importance for the maintenance and operation of underground steel networks.
    Źródło:
    Archives of Thermodynamics; 2020, 41, 4; 3-22
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A data assimilation approach for estimating strength of steel pipes reinforced with composite sleeves under unsteady pressure-flow conditions
    Autorzy:
    Witek, Maciej
    Uilhoorn, Ferdinand
    Powiązania:
    https://bibliotekanauki.pl/articles/1845456.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pipe wall metal loss
    composite sleeve
    pipe fracture
    gas dynamics
    data assimilation
    Opis:
    The aim of this paper is twofold: to estimate the unsteady pressure-flow variations in gas transmission pipelines using the ensemblebased data assimilation approach and to analyse the strength of steel tubes reinforced with composite sleeves containing localized part-wall thickness loss caused by corrosion while taking into consideration a safe operating pressure of the pipeline. For a steel thin-walled cylinder containing a partwall metal loss, a flexible wrap of fibreglass as well as carbon glass with epoxy resin are determined. The strength of the repaired pipeline with two kinds of materials for sleeves is investigated taking into consideration the internal pressure at the defect location. For the case study, a section of the Yamal transit pipeline on the Polish territory is selected. The results enable pipeline operators to evaluate the strength of corroded steel pipelines and develop optimal repair activities, which are of vital importance for the maintenance and operation of underground steel networks.
    Źródło:
    Archives of Thermodynamics; 2020, 41, 4; 3-22
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of hydrogen blended natural gas on linepack energy for existing high pressure pipelines
    Autorzy:
    Witek, Maciej
    Uilhoorn, Ferdinand
    Powiązania:
    https://bibliotekanauki.pl/articles/2134929.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    existing steel pipeline
    hydrogen blended natural gas
    hydrogen percentage
    content
    linepack energy
    Opis:
    The aim of this work is to examine the impact of the hydrogen blended natural gas on the linepack energy under emergency scenarios of the pipeline operation. Production of hydrogen from renewable energy sources through electrolysis and subsequently injecting it into the natural gas network, gives flexibility in power grid regulation and the energy storage. In this context, knowledge about the hydrogen percentage content, which can safely effect on materials in a long time steel pipeline service during transport of the hydrogen-natural gas mixture, is essential for operators of a transmission network. This paper first reviews the allowable content of hydrogen that can be blended with natural gas in existing pipeline systems, and then investigates the impact on linepack energy with both startup and shutdown of the compressors scenarios. In the latter case, an unsteady gas flow model is used. To avoid spurious oscillations in the solution domain, a flux limiter is applied for the numerical approximation. The GERG-2008 equation of state is used to calculate the physical properties. For the case study, a tree-topological high pressure gas network, which have been inservice for many years, is selected. The outcomes are valuable for pipeline operators to assess the security of supply.
    Źródło:
    Archives of Thermodynamics; 2022, 43, 3; 111--124
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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