THEORETICAL AND EXPERIMENTAL INVESTIGATION OF HEAT CONDUCTION IN AIR, INCLUDING EFFECTS OF OXYGEN DISSOCIATION

摘要

The one-dimensional, nonsteady flow of heat through gases at constant pressure is considered where the coefficients of thermal conductivity and diffusivity are functions of temperature. For ideal gases, the diffusivity is taken to be directly propor¬tional to the integral of thermal conductivity. In the case of air, it is further assumed that the diffusiv¬ity becomes a constant in the temperature interval where oxygen dissociation occurs. These assump¬tions facilitate numerical solution of the heat flow equation for the case of a semi-infinite gas medium with a constant initial temperature and a constant boundary temperature.