Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 0-89116-559-2

International Heat Transfer Conference 8
August, 17-22, 1986, San Francisco, USA

HEAT TRANSFER FOR FLOW OF AN ABSORBING, EMITTING, AND ISOTROPICALLY SCATTERING MEDIUM THROUGH A TUBE WITH REFLECTING WALLS

Get access (open in a dialog) DOI: 10.1615/IHTC8.4260
pages 803-808

Abstrakt

The intent of this study is to examine convective and radiative heat transfer for laminar or turbulent flow of a gas through a cylindrical duct. The gas contains absorbing and emitting nongray gases and soot, and absorbing, emitting and isotropically scattering gray particles. The radiative properties of the absorbing gases, consisting of carbon dioxide and water vapor, and soot are temperature dependent, whereas those for the particles are temperature independent. The absorbing gases, soot, and particles have identical temperatures and velocities. Radial molecular and turbulent transport of energy is accounted for. The duct walls are opaque, gray, and diffusely emitting and reflecting and are held at a prescribed temperature distribution. Axial and radial gas temperature profiles and wall heat flux distributions are obtained utilizing the zone method with absorbing gases and soot radiative properties evaluated from the weighted sum of gray gases model. Emphasis is placed on examining the influence of the duct wall emittance, soot volume fraction, and particle scattering on the gas temperatures and wall heat fluxes.