The processing of human wastes by wet oxidation for manned spacecraft
Spacecraft wet oxidation for human waste processing, discussing temperature and gas pressure effects, catalyst types, pump requirements, etc
Jaffe, R. J.↗
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Results for “Pressure effect”
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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A kinetic study of the fluorination of silver
Silver fluorination kinetics, taking temperature and pressure effects into account
Odonnell, P. M.↗
Slope discontinuities in pressure vessels
Shell of revolution /pressure vessel/ with meridional slope discontinuity, calculating pressurization effect on stresses by computer program
Skogh, J.↗
Calculated pressure-induced vibrational absorption in H2-H2 collisions in hydrogen gas
Pressure effects on high temperature vibrational absorption coefficients for atomic hydrogen collisions in hydrogen gas
Patch, R. W.↗
Composition gradients in Ni-Fe alloy films produced by vapor deposition from a tungsten boat
Ni-Fe alloy films composition gradients produced by W boats evaporation, noting vapor pressures effect
Carson, K. R.↗
Structural analysis of a solid propellant motor under axisymmetric thermal and pressure loading
Solid propellant engine structural analysis, examining transient thermal loading and internal pressure effects
Chen, J. C.↗
Reactions near the burning surface of double- base propellants
Reaction heat for flameless combustion of double- base propellant using differential scanning calorimetry and thermogravimetric analysis, noting pressure effects
Kirby, C. E.↗
Effect of random fluctuations in pressure gradient on channel flow
Stationary Gaussian Markovian form randomly fluctuating pressure gradient effects on steady incompressible channel flow velocity
Perlmutter, M.↗
Acoustic liner design from a fluid mechanics approach
Acoustic liner design for propellant combustion instability and jet aircraft noise suppression, discussing cross flow and oscillatory pressure effects
Harrje, D. T.↗
Imperfection sensitivity of axially compressed stringer reinforced cylindrical panels under internal pressure
Longitudinal edge stiffness and internal pressure effects on buckling and initial postbuckling behavior of axially compressed stringer reinforced cylindrical panels, discussing imperfection sensitivity
Stephens, W. B.↗
Photographic study of solid propellants burning in an acceleration environment
Photographic study of acceleration and pressure effects on Al agglomerates and combustion processes on solid propellant surface, describing pit growth by combustion model
Baker, K. L.↗
Physical limitations in sensors for a drag-free deep space probe
The inner perturbing forces acting on sensors were analyzed, taking into account the technological limitations imposed on the proof mass position pickup and proof mass acquisition system. The resulting perturbing accelerations are evaluated as a function of the drag-free sensor parameters. Perturbations included gravitational attraction, electrical action, magnetic action, pressure effects, radiation effects, and action of the position pickup. These data can be used to study the laws of guidance, providing an optimization of the space probe as a whole.
Juillerat, R.↗
Infrared laboratory studies of synthetic planetary atmospheres
The initial stages of the research were involved with a test of Burch's law of multiplicative transmittance for mixed absorbing gases when their lines are broadened by H2 and He, which are constituents of the atmospheres of the major planets. The broadening of individual lines in the CO fundamental by various gases was investigated. Line strength and half-width for individual CO lines were studied as a function of temperature. Measurements of total band absorptance as a function of absorber thickness and total effective pressure were made at various temperatures for bands of CO and N2O. Attempts were made to develop a phenomenological theory of line broadening that would account for the phenomena observed for the CO fundamental and those reported for more highly polar gases. Laboratory measurements of nitric acid vapor absorptance were compared with balloon measurements in arriving at an estimate of the quantity of nitric acid vapor present in the earth's atmosphere in the region of the ozone layer.
Williams, D.↗
Short-time oxidation of zirconium.
Study of zirconium oxidation kinetics for maximum exposure times of 3 min and in the temperature range 440 to 850 C. 'Discontinuous' oxidation runs were employed whereby a specimen was inserted into the gas stream for a predetermined time, removed and weighed, and reinserted into the oxidation atmosphere. It is considered that the increase in the observed activation energy for the early stage parabolic oxidation is a manifestation of a change from an n-type oxide to a predominantly p-type oxide, in agreement with the authors' earlier conclusion (1971) based on pressure effects.
Srivastava, L. P.↗
Temperature and pressure dependence of CO2 extinction coefficients.
Results are presented of CO2 extinction coefficient measurements that were performed under conditions of temperature and pressure different from those used by previous investigators. The results show that, whereas pressure effects are generally negligible, temperature dependence is strong enough to invalidate the use of room temperature data for the Mars atmosphere.
Demore, W. B.↗
Structure, composition, and properties of lunar crust.
Lunar seismic data from three Apollo seismometers are interpreted to determine the structure of the moon's interior to a depth of about 100 km. The travel times and amplitudes of P and S arrivals from Saturn IV-B and LM impacts are interpreted in terms of a velocity profile. The most outstanding feature of the model is that, in the Fra Mauro region of Oceanus Procellarum, the moon has a 65 km-thick layered crust. Other features of the model are: (1) rapid increase of velocity near the surface due to pressure effects on dry rocks, (2) a discontinuity at a depth of about 25 km, (3) near-constant velocities between 25 and 65 km deep, (4) a major discontinuity at 65 km marking the base of the lunar crust, and (5) very high apparent velocities (about 9 km/sec for P waves) in the lunar mantle below the crust.
Toksoz, M. N.↗
Saturn's 3 nu 3 methane band - An analysis in terms of a scattering atmosphere
Using parameters recently measured in the laboratory, the shapes of manifolds belonging to the R-branch of Saturn's 3 nu 3 CH4 band were analyzed in terms of a homogeneous scattering model of Saturn's atmosphere, and the results were compared with those of an earlier analysis in terms of a reflecting-layer model. The resulting effective pressure is an order of magnitude smaller than for the reflecting-layer analysis, and the C/H ratio is an order of magnitude higher than the solar value. The overall fit of the theoretical profiles to the observed manifold shapes is distinctly worse, especially for R(7). Scattering evidently plays only a minor role in the formation of this band along Saturn's south-central meridian.
Trafton, L.↗
Magnetic field and plasma inside and outside of the Martian magnetosphere
Simultaneous magnetic and plasma measurements, carried out by wide angle plasma detectors in the Mars environment, are compared in order to identify regions with significantly different physical properties. Magnetograms and ion spectra indicate changes in the magnetopause and magnetosphere of Mars that are associated with the dynamic pressure effect of the solar wind.
Dolginov, S. S.↗