Wszystkie pola: radiative thermal conductivity - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Measurements of a steel charge emissivity under strong irradiance conditions
Autorzy:: Benduch, A.
Wyczółkowski, R.
Powiązania:: https://bibliotekanauki.pl/articles/102336.pdf
Data publikacji:: 2014
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: porous charge
thermal radiation
thermal resistance
long elements bundles
effective thermal conductivity
radiative thermal conductivity
Opis:: Steel bars are manufactured in the rolling process, whereby they are characterized by strain hardening and poor plastic properties. In many application cases such properties are improper, therefore, additional heat treatment is required. Crucial influence on the products quality after heat treatment has an appropriate selection of process parameters. In many modern technologies of heat treatment the charge of porous structure is subjected to the heating process. Proper control of heat treatment parameters of bundles of rods requires knowledge on their thermal properties. However, it also requires accurate identification of complex heat transfer processes occurring in the porous material. Such analysis, with respect to bundles of bars, provide a response of qualitative nature of the heat exchange area of these charges. The article describes the emissivity measurements of samples of the steel charge using a thermal imaging camera.
Źródło:: Advances in Science and Technology. Research Journal; 2014, 8, 23; 19-25
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Heat transfer study in a convective-radiative fin with temperature-dependent thermal conductivity and magnetic field using variation parameters method
Autorzy:: Sobamowo, G.
Jayesimi, L.
Femi-Oyetoro, J.
Powiązania:: https://bibliotekanauki.pl/articles/122666.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: heat transfer study
convective-radiative fin
variation of parameters method
temperature-dependent thermal conductivity
magnetic field
wymiana ciepła
przewodność cieplna
żebro
Opis:: In this work, a heat transfer study is carried out in a convective-radiative straight fin with temperature-dependent thermal conductivity and a magnetic field using the variation of parameters method. The developed heat transfer model is used to analyze the thermal performance, establish the optimum thermal design parameters and investigate the effects of thermo-geometric parameters and non-linear thermal conductivity parameters on the thermal performance of the fin. The results obtained are compared with the results in literature and good agreements are found. The analysis can serve as basis for comparison of any other method of analysis of the problem and it also provides a platform for improvement in the design of fin in heat transfer equipment.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2017, 16, 3; 85-96
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Thermal analysis of the convective-radiative fin with a step change in thickness and temperature dependent thermal conductivity
Autorzy:: Torabi, M.
Yaghoobi, H.
Kiani, M. R.
Powiązania:: https://bibliotekanauki.pl/articles/281516.pdf
Data publikacji:: 2013
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: step straight fin
simultaneous convection and radiation
temperature dependent thermal conductivity
DTM analytical technique
Opis:: This paper provides heat transfer analysis in a straight fin with a step change in thickness and variable thermal conductivity, which is losing heat by simultaneous convection and radiation. The calculations are carried out by using the differential transformation method (DTM) that can be applied to various types of differential equations. The results obtained employing DTM are compared with an accurate numerical solution to verify the accuracy of the proposed method. Several graphs are provided to illustrate how the temperature distribution is affected by the (i) thickness parameter, (ii) dimensionless fin semi thickness, (iii) length ratio, (iv) thermal conductivity parameter, (vi) Biot’s number, and (vii) radiation-conduction parameter. This collection of graphs provides a comprehensive picture of the thermal performance of the system under steady state conditions.
Źródło:: Journal of Theoretical and Applied Mechanics; 2013, 51, 3; 593-602
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The temperature - and stress fields of valves of IC engine
Autorzy:: Jaskólski, J.
Krzyżak, R.
Powiązania:: https://bibliotekanauki.pl/articles/243403.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: intake valve
output valve
YSZ
ferberite
scheelite
silicides
pyroxene
composite
joining of materials
thermal conductivity
radiative transfer
thermal expansion
Opis:: The paper concerns building up one exhaust valve of composite-steel and two intake ceramics-steel valves of a hypothetical adiabatic engine. The input temperatures were computed using three diverse FORTRAN95 programs, solving a shortened optical integral equation with radiative transfer, transient differential equation while starting and switching off the engine and a rod like diff. Equation with 'progonka' (Thomas) solution. The ANSYS11 programme was fed up with the output of the programs. It turns out that, generally, a mineralogical, crystal-chemical approach to the joining of materials results in stresses known from the common metal engines. Such problems as CTE enhancing (partly hypothetical) by means of doping the anionic compounds by cationic ones, swelling of structures, compressibility versus coefficient of thermal expansion (CTE) , compatibility of crystal motifs while joining, thermal shock resistance, switching the bonds, mechanical longevity, radiation protection etc were addressed. It turns out that true nature of the temperature and stress field, especially of the exhaust valve is closer to the FORTRAN temperature computation than, e.g. From the heat film coefficients (ANSYS11).
Źródło:: Journal of KONES; 2007, 14, 3; 245-252
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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