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    Wyświetlanie 1-3 z 3
    Tytuł:
    The Heat Transfer Process Between Two Bodies with a Large Temperature Difference
    Autorzy:
    Przyłucka-Bednarska, Aleksandra
    Rywotycki, Marcin
    Sołek, Krzysztof
    Malinowski, Zbigniew
    Powiązania:
    https://bibliotekanauki.pl/articles/2134108.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    heat transfer coefficient
    thermal conductivity
    inverse solution
    steel
    Opis:
    Heat transport when two surfaces of solids come into contact is an important phenomenon in many metallurgical processes. Determining the boundary conditions of heat transfer allows to obtain the correct solutions of the heat conduction equation. The paper presents models for determining the heat transfer coefficient between steel materials in contact. Experimental tests were carried out to measure the temperature changes of the contacting samples made of steel S235 (1.0038) and steel 15HM (1.7335) under the pressure of 10, 15 and 20 MPa. There was a large temperature difference between the samples. The results of the experiment were compared with numerically calculated temperatures and the value of the heat transfer coefficient was determined at different pressure values depending on the time.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 3; 1161--1165
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Inverse Solution to the Vertical Plate Cooling by Radiation and Convection in Air
    Autorzy:
    Hadała, Beata
    Malinowski, Zbigniew
    Gołdasz, Andrzej
    Cebo-Rudnicka, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/2134090.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    convection heat transfer
    radiation heat transfer
    plate emissivity
    vertical plate
    Opis:
    The inverse solution to the heat flux identification during the vertical plate cooling in air has been presented. The developed solution allowed to separate the energy absorbed by the chamber due to radiation from the convection heat losses to air. The uncertainty tests were carried out and the accuracy of the solution has been estimated at a level of 1%-5% depending on the boundary condition model. The inverse solution was obtained for the temperature measurements in the vertical plate. The stainless-steel plate was heated to 950°C and then cooled in the chamber in air only to about 30°C. The identified heat transfer coefficient was compared with the Churchill and Chu model. The solution has allowed to separate the radiation heat losses and to determine the Nusselt number values that stay in good agreement with the Churchill and Chu model for a nearly steady-state air flow for the plate temperature below 100°C.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 3; 1167--1178
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of Long Charge Heating in a Rotary Furnace
    Autorzy:
    Hadała, Beata
    Rywotycki, Marcin
    Malinowski, Zbigniew
    Kajpust, S.
    Misiowiec, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049752.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    long charge heating model
    heating curve
    rotary furnace
    Opis:
    Heat consumption and steel loss for scale determine the costs of a heating process. The heating rate influences both. This paper evaluates the heating rate of a long charge made of three various materials, depending on the changes of the furnace atmosphere on the rotary furnace circumference. Numerical computing was performed based on a formulated heat transfer model in the rotary furnace chamber, while considering the growth of the scale layer. One heating curve was selected, which has allowed the heating time to be reduced by 36% while limiting the scale loss by 40%. It was also shown that the thermal stresses and strains should not lead to fractures of the charge heated.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 2; 659-668
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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