Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
A STUDY OF THE ABSORPTION CROSS-SECTION WITH THE H2O GASES CONCENTRATION IN RADIATIVE TRANSFER CALCULATIONS.
Submission Author:
Gabriel de Lima Bernardino , RN
Co-Authors:
Gabriel de Lima Bernardino, Andre Maurente
Presenter: Anderson Nunes de Sousa
doi://10.26678/ABCM.COBEM2019.COB2019-0145
Abstract
In radiative heat transfer problems involving gases at high temperatures, such as combustion, the gases emit and absorb large amounts of radiation. Absorption cross-section is a property that is involved with the emission and absorption of energy by these molecular gases. The study to be presented has a medium composed of H2O. This study consists of verifying how the absorption cross-section varies with H2O concentration. The analysis is performed by analyzing the radiative heat transfer and divergence of the radiative heat transfer calculated for isothermal medium at 1500 K and homogeneous medium with 50 %, 75 % and 100 % H2O concentration. The results present that the absorption cross-section is not very sensitive to the concentration, so that it can be used as a constant with relation to concentration in radiative heat transfer calculations for H2O gases.
Keywords
Absorption cross-section, spectral radiative properties, Concentration, Radiative heat transfer, H2O
