Analysis of Air Exchange System Influence on Thermal and Concentration Modes in the Local Working Area under Radiant Heating Conditions

Analysis of Air Exchange System Influence on Thermal and Concentration Modes in the Local Working Area under Radiant Heating Conditions

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Parent link:Frontiers in Heat and Mass Transfer (FHMT).— .— Bogota: Global Digital Central
Vol. 22, iss. 6.— 2024.— P. 1597-1612
Další autoři: Borisov B. V. Boris Vladimirovich, Kuznetsov G. V. Geny Vladimirovich, Maksimov V. I. Vyacheslav Ivanovich, Nagornova T. A. Tatiana Aleksandrovna, Salikhov F. Yu. Feliks Yurjevich
Shrnutí:Title screen
This study deals with the numerical investigation of combined heat transfer via conduction, laminar natural convection, and surface radiation in a closed rectagular cavity with a radiant heating source. Unsteady two-dimensional equations of mass, momentum, and energy conservation for complex heat transfer process under study were formulated in terms of the vorticity – stream function – temperature variables and solved by means of the finite difference method on a uniform grid. Developed numerical code was validated against two benchmark problems of convective and convective-radiative heat transfer. When analyzing complex heat transfer regularities, we varied the following parameters: dimensionless time 5<t<800, Rayleigh number 6*10^4<Ra<4*10^6, conduction-radiation number 19.71<Nr<78.84, surface emissivity 0.2<e<0.9, emitter length 0.1<D<1, walls thickness 0.05<M<0.25. According to the results of mathematical modelling, it was found that the radiant parameters significantly affected the formation of differential and integral characteristics of conjugate heat transfer. Along with that the convective Nusselt number was slightly changed in geometrical and physical conditions under study. An increase in the walls thickness led to a reduce in the temperature of the air cavity. However, the effect of wall thickness on the convective and radiative Nusselt numbers was not significant
Текстовый файл
AM_Agreement
Vydáno: 2024
Témata:
gas infrared heater
air exchange system
local working areas
temperature fields
CO2 concentration fields
труды учёных ТПУ
электронный ресурс
On-line přístup:https://doi.org/10.32604/fhmt.2024.056758
https://www.sciopen.com/article/10.32604/fhmt.2024.056758
Médium: Elektronický zdroj Kapitola
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=683801

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