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    Wyświetlanie 1-7 z 7
    Tytuł:
    Thermomechanical coupling between the flow of steam and deformation of the valve during start-up of the 200 MW turbine
    Autorzy:
    Bielecki, M.
    Karcz, M.
    Radulski, W.
    Badur, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1955817.pdf
    Data publikacji:
    2001
    Wydawca:
    Politechnika Gdańska
    Tematy:
    fluid-solid interaction
    compressible flow
    heat
    creep
    damage
    fatique
    FEM
    FVM
    stresses
    Opis:
    The lifetime estimation of power station structures and components, subjected to fatigue loading, is essential for determining the moment of repair or replacement. Therefore the degradation behaviour and damage development within material should be very well understood. This research focuses on a fluid-solid interaction that has been developed in Finite Volume Method software for description of heat and flow loading on a cut-off valve and Finite Element Method software for conduct researches on fatigue and creep damage of the valve material.
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2001, 5, 2; 125-140
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A model-measurements comparison of atmospheric forcing and surface fluxes of the Baltic Sea
    Autorzy:
    Rudolph, C.
    Lehmann, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/48268.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    coupled sea-ice-ocean model
    surface flux
    temperature
    pressure
    radiation flux
    heat flux
    air-sea interaction
    Baltic Sea
    wave radiation
    Opis:
    Observed basic meteorological quantities, heat and radiation fluxes from three different measurement stations in the Baltic Sea are compared with model data of the coupled sea-ice-ocean model BSIOM in order to evaluate the atmospheric forcing, corresponding surface fluxes and the sea surface response. Observational data weremade available from the BASIS winter campaigns in 1998 and 2001 as well as from the r/v ‘Alkor’ cruise in June 2001. Simulated fluxes were calculated from prescribed atmospheric forcing provided from the SMHI meteorological database and modelled sea surface temperatures. The comparison of these fluxes with observations demonstrates a strong correlation, even though mean differences in sensible heat fluxes range from 4 to 12 W m−2 in winter and −25 W m−2 in the June experiment. Differences in latent heat fluxes range from −10 to 23 W m−2. The short-wave radiation flux used as model forcing is on average 15 W m−2 less than the corresponding observations for the winter experiments and 40 W m−2 for the June experiment. Differences in net long-wave radiation fluxes range from −5 to 12W m−2 in winter and −62W m−2 for the June experiment. The correspondence between measured and calculated momentum fluxes is very high, which confirms the usability of our model component for calculating surface winds and wind stresses from the atmospheric surface pressure.
    Źródło:
    Oceanologia; 2006, 48, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Calorimetric studies of the energy deposition on a material surface by plasma jets generated with QSPA and MPC devices
    Autorzy:
    Chuvilo, A. A.
    Garkusha, I. E.
    Makhlaj, V. A.
    Petrov, Y. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/147706.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    quasi steady-state plasma accelerator (QSPA)
    energy density
    heat load
    plasma streams
    plasma-surface interaction
    Opis:
    Studies of the energy deposition by plasma jets incident on a material surface are of topical interest for both the fusion and plasma technology applications. In this paper the results are reported of a comparative study of plasma energy deposition on different material surfaces exposed to plasma jets of various duration and energy density, generated using the QSPA Kh-50 and the MPC devices. The spatial distribution of plasma energy density and the heat load on the surface were measured with a movable calorimeter. The measurements demonstrate that in the case of an exposure to QSPA plasma jets the absorbed heat load is approximately equal to 55-60% of the energy in the incident plasma jet. In the case of plasma jets generated using the MPC device the heat load on the target surface and was practically the same as for the QSPA jets, and additional shielding effects were found to be negligible due to the short duration of plasma jets.
    Źródło:
    Nukleonika; 2012, 57, 1; 49-53
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Researches of influence of electric current on tribounit "Wheel-rail"
    Issledovanie vlijanija ehlectricheskogo toka na tribosoprjazhenie 'Koleso-rel'c'
    Autorzy:
    Gorbynov, N.
    Nozgenko, V.
    Nozgenko, E.
    Kluev, S.
    Bondarenko, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/793000.pdf
    Data publikacji:
    2014
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    electrical current
    coupling
    heat
    mechanical wear
    friction coefficient
    wheel-rail interaction
    railway rolling stock
    exploitation
    railway transport
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2014, 14, 1
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on emulsified tyre pyrolysis oil as a coal flotation collector
    Autorzy:
    Yang, R.
    Shen, L.
    Wang, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/109341.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    pyrolysis oil
    coal flotation
    contact angle
    interaction heat
    adsorption
    Opis:
    In this paper the possibility of using the pyrolysis oil derived from waste tyres as a collector in flotation of coal was evaluated. The pyrolysis oil was obtained at the initial and final pyrolysis temperatures of 400 and 700 oC, respectively, and the heat holding time of 30 min. Flotation results indicated that the pyrolysis oil emulsion showed stronger collecting ability than diesel and the concentrate ash content just slightly increased in comparison to flotation in the presence of diesel. The contact angle measurement and immersion microcalorimetry test correlated well with the flotation data. The Fourier Transform Infrared Spectroscopy results demonstrated that diesel and pyrolysis oil emulsion is physically adsorbed on the coal surface.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2017, 53, 1; 279-287
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of non-Fourier thermal waves interaction in a solid material
    Autorzy:
    Lenarczyk, Marcin
    Domański, Roman
    Powiązania:
    https://bibliotekanauki.pl/articles/240472.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    non-Fourier equation
    heat waves
    hyperbolic heat conduction
    thermal wave interaction
    fale cieplne
    przewodzenie ciepła
    Opis:
    In this paper, effects of non-Fourier thermal wave interactions in a thin film have been investigated. The non-Fourier, hyperbolic heat conduction equation is solved, using finite difference method with an implicit scheme. Calculations have been carried out for three geometrical configurations with various film thicknesses. The boundary condition of a symmetrical temperature step-change on both sides has been used. Time history for the temperature distribution for each investigated case is presented. Processes of thermal wave propagation, temperature peak build-up and reverse wave front creation have been described. It has been shown that (i) significant temperature overshoot can appear in the film subjected to symmetric thermal load (which can be potentially dangerous for reallife application), and (ii) effect of temperature amplification decreases with increased film thickness.
    Źródło:
    Archives of Thermodynamics; 2019, 40, 1; 115-126
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bödewadt flow and heat transfer of dusty fluid with Navier slip
    Autorzy:
    Turkyilmazoglu, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/38694423.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Podstawowych Problemów Techniki PAN
    Tematy:
    revolving flow
    velocity slip
    dusty fluid
    wall shears
    fluid-particle interaction
    heat transfer
    Opis:
    The current work deals with two-phase flow and heat transfer induced by a mixture of fluid and dust particles revolving with a constant angular velocity above a slippage planar wall. Interaction of the solids with the fluid through an interaction force while rotating above the surface is formulated through a similarity system of equations akin to the Bödewadt flow in the absence of suspended particles. Although the velocity fields of fluid and solid are strictly coupled, the heat fields are decoupled from the velocity fields, but they are still in contact with each other due to the coupling of fluid and particle temperatures. The dusty fluid flow character is simulated numerically to capture the fluid and dust phase behaviors. The momentum and thermal layers are resolved in the presence of wall slip mechanism. Illustrative and quantitative results are eventually presented reflecting the physical features of particles and fluid at any stage of interaction during the rotary motion. It is revealed that the wall slip mechanism can be effective enough to alter the usual Bödewadt flow phenomenon.
    Źródło:
    Archives of Mechanics; 2022, 74, 2-3; 157-172
    0373-2029
    Pojawia się w:
    Archives of Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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