High temperature properties and heat transfer phenomena for steam at temperatures up to 5000K.

Abstract

Thermodynamic and transport properties and heat phenomena for steam in a high temperature region were examined. First, a set of computer subroutines was developed -the Fraction code, for generating molar fractions of a dissociating steam and gas mixture for a given pressure and temperature. Second, a set of computer subroutines was developed for the computation of all possible combinations of binary diffusion coefficients and of the diffusion coefficient for the component through a gas mixture. Third, steam properties may be evaluated for an ideal gas mixture which includes no effect of chemical reactions-frozed state, or for a non-ideal solution at equilibrium state which includes maximal effects of chemical reactions-effective properties at equilibrium state. A set of computer subroutines was developed-the Frozen Properties code, for evaluating dissociated steam frozen properties for a given pressure and temperature. A computer code, UODH2O (University of Ottawa Dissociation H$\sb2$O code), was developed using a look-up table and interpolation technique to generate effective properties at pressure from 0.01 to 100.00MPa and temperature from 1000 to 5726.85$\sp\circ$C. Based on the semi-empirical model by Nesterenko et al. (1967 a) for dissociated nitrogen tetroxide (N$\sb2$O$\sb4$#2NO$\sb2$ a two-component gas mixture), a method was developed to determine the Nusselt number of a chemically reacting (dissociated) fluid flow. (Abstract shortened by UMI.)