Tables of Thermodynamic Properties of Air in Chemical Equilibrium

Tables of Thermodynamic Properties of Air in Chemical Equilibrium PDF

Author: Joseph Hilsenrath

Publisher:

Published: 1965

Total Pages: 364

ISBN-13:

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Tables for the thermodynamic properties for air are presented which take into account the effect of dissociation and ionization and the limiting-law Debye-Huckel and second virial corrections upon the thermodynamic properties and the equilibrium compositions. Values are tabulated from 1500K in steps of 100K to 15,000K at close spacings in the logarithm of the density (log rho/rho sub o = -7. (0.2)2.2) for the compressibility factor Z Z = PV/RT; the dimensionless functions for: internal energy, E/RT; enthalpy, H/RT; entropy, S/R Xi; log P(atm) and Z = sigma C sub i. The underlying equations and the input data are discussed briefly. The effects of the real gas corrections on the equilibrium properties are illustrated graphically. The equilibrium composition is given for selected temperatures over the tabulated density range. The wide range of temperatures and densities over which the thermodynamic properties have been tabulated make the tables useful in a variety of engineering design and test programs, and in scientific research and development.

Approximations for the Thermodynamic and Transport Properties of High-temperature Air

Approximations for the Thermodynamic and Transport Properties of High-temperature Air PDF

Author: C. Frederick Hansen

Publisher:

Published: 1959

Total Pages: 48

ISBN-13:

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The thermodynamic and transport properties of high-temperature air are found in closed form starting from approximate partition functions for the major components in air and neglecting all minor components. The compressibility, enthalpy, entropy, the specific heats, the speed of sound, the coefficients of viscosity and of thermal conductivitiy, and the Prandtl numbers for air are tabulated from 500° to 15,000° K over a range of pressure from 0.0001 to 100 atmospheres. The energy of air and the mol fractions of the major components of air can be found from the tabulated values for compressibility and enthalpy. It is predicted that the Prandtl number for fully ionized air, which is in complete equilibrium, will become small compared to unity, the order of 0.01, and this implies that boundary layers in such flow will be very transparent to heat flux.