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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Program computes solutions for flow parameters in arbitrary gas mixtures behind a normal and a reflected normal shock, for in-flight and shock-tube stagnation conditions. Equilibrium flow calculations are made by a free-energy minimization technique coupled with the steady-flow conservation equations and a modified Newton-Raphson iterative scheme.
Fluidic oscillator use as molecular weight sensor for gas mixtures
Properties of nonequilibrium radiation emitted by Mars atmosphere gas mixtures
Spacecraft attitude control microthrustors utilizing catalytically reactive gas mixtures during pulse mode and steady state operation
Computer program in Fortran IV language for equilibrium normal shock and stagnation point solutions for arbitrary gas mixtures
Direct calculation and tables of specific heats and related thermodynamic properties of arbitrary gas mixtures - Mars atmosphere model
Inviscid hydrodynamical model for determining density profile of binary single phase gas mixture in swirl and duct flows
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
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