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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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Titanium is one of several gettering materials available for removing nitrogen from inert gases. The reaction rate of titanium-metal sponge and nitrogen in argon-nitrogen mixtures was studied at 900 degrees C. The rate was found to depend upon the partial pressure of nitrogen in the gas phase. Mathematical relationships simulate titanium systems.
Experimental study of effect of finite homogeneous reaction rates on heat transfer in turbulent tube flow
Photolysis of mixtures of oxygen with nitrous oxide, nitrogen, and carbon dioxide, and relative reaction rates of 1 D oxygen atoms with admixed gases
Electrochemical and chemical catalysis differences due to applied field and solvent, discussing fuel cell reaction rates enhancement in electrochemical energy conversion
Upper atmospheric science during IQSY, noting ionospheric plasma diffusion and drift under electric field action, recombination and reaction rates and plasma line
Ion-molecule collisions of Ar-Co and N-No pairs, discussing charge exchange reaction rates and spiraling nature
Elemental fluorine reactions with Ni, Cu, Fe, Ti, Be Al, Zr and Ag, giving reaction rate constants, activation energies, etc
Collision cross sections direct measurement for determining macroscopic reaction rates in inelastic molecular collision processes in gas dynamics
Stereospecificity and reaction rate of enzymatic hydrolysis of racemic substrate by pepsin determined by nuclear magnetic resonance spectroscopy
CaO reaction rate with ZrC in effusion cells as function of reactant ion diffusion through product layer
Statistical transport, energy and chemical reaction rate in turbulent flow field with uniform velocity gradient, using Brownian motion theory
Ketene and diazomethane flash photolytic measurement of reaction rates of singlet-triplet methylene deactivation
Laminar boundary layer effects on reaction rate constants deduced from shock tube measurements
A rather general computer code has been developed for the numerical solution of the laminar boundary layer and thin shock layer (stagnation point only) equations for a multi-component gas mixture with finite reaction rates. The purpose of this paper is to indicate the capabilities of this computer program by presenting solutions for pure air flows and flows with carbon ablation. At the body surface the effects of oxidation and sublimation of carbon are taken into account with the following species included in the gas model: 0 2 , N 2 , O, N, NO, NO + , C 1 , C 2 , C 3 , CN, CO, and CO 2 . Results for the boundary layer along a 10° half-angle hyperboloid with ablation of carbon are compared to pure air results. Shock layer results for several wall temperatures and altitudes are presented and compared to pure air results. Other types of problems that can be solved with this computer code are indicated.
Initial reaction rates of oxygen difluoride with diborane related to reactant concentration and temperature
Strongly magnetized relativistic degenerate electron gas proton-proton reaction rates and electron capture over various temperatures, densities and magnetic field strengths
E and F region positive ion composition, electron concentration and thermal balance vertical profile, discussing ionizing radiation spectrum, plasma cooling, primary chemical reaction rates and ionospheric formation
General chemical kinetics computer program for complex gas mixtures has been developed. Program can be used for any homogeneous reaction in either one dimensional flow or static system. It is flexible, accurate, and easy to use. It can be used for any chemical system for which species thermodynamic data and reaction rate constant data are known.