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Equilibrium high temperature thermodynamic property computations with vibrational and rotational corrections for gas mixtures
Computing equilibrium chemical composition and thermodynamic properties of reacting gas mixtures by reduction to single iterative equation
We present the results of a study of the structure of a parallel compressible mixing layer in a binary mixture of gases. The gases included in this study are hydrogen (H2), helium (He), nitrogen (N2), oxygen (02), neon (Ne) and argon (Ar). Profiles of the variation of the Lewis and Prandtl numbers across the mixing layer for all thirty combinations of gases are given. It is shown that the Lewis number can vary by as much as a factor of eight and the Prandtl number by a factor of two across the mixing layer. Thus assuming constant values for the Lewis and Prandtl numbers of a binary gas mixture in the shear layer, as is done in many theoretical studies, is a poor approximation. We also present profiles of the velocity, mass fraction, temperature and density for representative binary gas mixtures at zero and supersonic Mach numbers. We show that the shape of these profiles is strongly dependent on which gases are in the mixture as well as on whether the denser gas is in the fast stream or the slow stream.
Orientation relaxation in symmetrical-top gases and binary gas mixtures, noting prediction of cross sections from kinetic theory data for molecules
Steady state thermal diffusion in reacting gas mixtures, emphasizing relation of diffusion factors with thermal conductivity due to chemical reaction
Continuous wave laser action in chlorine, Ar and He gas mixtures, observing energy transfer between Ar and chlorine by pumping action
Brayton cycle power conversion system using He-Xe gas mixture, discussing compressor net engine and turbine static efficiencies
Screening and evaluation of gas mixture for dynamic simulation of rocket exhaust jets
Perovskite solar cell stability was investigated in moisture and gas mixtures. Moisture accelerates the degradation rate, but once light is removed, the performance is recoverable.
Convective stagnation heat transfer of carbon dioxide, nitrogen-argon gas mixtures compared to air in shock tube tests
The expression for the thermal conductivity of gas mixtures in chemical equilibrium is presented in a simpler and less restrictive form. This new form is shown to be equivalent to the previous equations.
Relative humidity in sterilizing gas mixture
A computer code is described whereby calculations of radiative properties of gas mixtures may be made. The program is arranged so that distinct radiative processes for each species are computed in individual subroutines. Provision is made for calculating radiative properties in nonequilibrium situations - separate rotational, vibrational, and electronic temperatures may be used. These features should provide a flexibility not currently available in such programs. The basic equations and the program listing in FORTRAN 4 language are presented. Sample calculations are given for high temperature air and carbon dioxide and are compared to calculations made with previously developed programs.
Empirical stagnation point-heat transfer relation in gas mixtures at high enthalpy potentials
Expressions for the diffusion coefficient of ions in gas mixtures are obtained from momentum transfer theory, and are given in terms of the diffusion coefficients and drift velocities of the ions in the pure component gases. Blanc's law holds exactly at all field strengths if the mean free time between collisions is independent of velocity (Maxwell model), but otherwise there may be either positive or negative deviations from Blanc's law at high fields. Such deviations are of comparable magnitude for the diffusion coefficients and the mobility, but are not identical. Specific cases of inverse-power potentials are treated in further detail, and some numerical examples are given for rigid-sphere interactions.
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Computer program in FORTRAN 4 for calculating shock tube performance for arbitrary equilibrium real gas mixtures
Collision integrals of various kinetic models compared to Boltzmann binary-collision operator for gas mixtures