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ISSN Online: 2377-424X

ISBN Print: 0-89116-559-2

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

COUPLED CONVECTIVE AND RADIATIVE TRANSFER IN STRONGLY NONISOTHERMAL C02 AND H20 LAMINAR FLOWS

Get access (open in a dialog) DOI: 10.1615/IHTC8.4240
pages 791-796

Аннотация

A laminar channel gas flow model for emitting, absorbing and nonscattering C02 and H20 between two isothermal walls is briefly presented. Energy and momentum equations, are solved simultaneously for strong temperature gradients using real thermophysical properties. Radiation band parameters of a random statistical model are generated with 200 cm-1 spectral resolution; heat transfer results obtained with narrow (25 cm-1) and wide (200 cm-1) band parameters are compared. It is shown that wide band parameters lead to the overestimation of the radiative transfer rate. The influence of the wall emissivity εω is analyzed in the case of optically thick H20 flows; it is found that global transfer rates increase with εω in the two cases of heated or cooled fluid. The feasibility and accuracy of a temperature measurement laser technique, applied to H20-air mixture flow, is discussed in the last section.