Infrared Radiation Properties of Ethylene

Abstract

Quanti/alive analysis of the effect of radialive energy blockage during the combustion process of condensed fuels requires a knowledge of the infrared radialion properties of various hydrocarbon gases as a function of temperature and optical pathleng/h. The spectral absorptivities of the four infrared-active bands of ethylene (CzH.J have been measured at low resolution for temperatures between 300 and 700 K. These measurements have been used to correlate both the spectral-mean parameters and the wide-band parameters for each of the four major bands in the infrared region. The spectral-mean parameters have been determined from the stalistical narrow-band model, while the wide-band parameters have been obtained from the Edwards exponential wide-band model. The wide-band parameters have been further utilized for the development of both the total emissivity and the Planck mean absorption coefficient charts. In addition, based on the Tien-Brosmer super-band model, the super-band parameters have also been determined in the present work for convenient engineering applicalion.