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Type: Artigo de evento
Title: Heat Transfer Combining Convection, Conduction And Radiation In The Flow Of Heated Air Through An Insulated Tube
Author: Franca Francis H.R.
Goldstein Jr. Leonardo
Abstract: In this work an analysis is made of the heat transfer from heated air flowing through an insulated tube, combining conduction, convection and radiation. The tube is separated from the external ambient by a non-ideal insulation, that is, there is radial heat flux leaving the duct to the ambient. The tube and the insulation wall are gray diffuse emitters and reflectors. The air velocity profile is turbulent and fully developed and the thermal entry region is taken in consideration. The effect of internal and external thermal radiation, on the air and duct temperature distributions are presented as a function of: the air inlet temperature, internal and external surfaces emittances, duct length and insulation thickness. The total heat lost by the air flow is compared when internal radiation is considered or not. The results show that, except for short ducts, the effect of internal radiation is small, whereas external radiation is important.
Editor: ASME, New York, NY, United States
Rights: fechado
Identifier DOI: 
Date Issue: 1995
Appears in Collections:Unicamp - Artigos e Outros Documentos

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