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Results for “thermally conductive”

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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At least 505 records · Page 28

All sources NASA NTRS DOE OSTI

NASA NTRS1988

NBC boil-off calorimeter for measuring thermal conductivity of insulating materials

Modern temperature, pressure and flow sensors along with a high speed digital control system have been incorporated into an existing thermal conductivity apparatus (ASTM C745). The system has also been modified to include the use of liquid helium as the refrigerant, if desired. The apparatus can be used to study thermal conductivity in the temperature range from 4 K to room temperature. Preliminary results on insulating materials indicate that the system update has significantly improved the precision and operational characteristics of the apparatus. Basic principles of operation, sources of system error and the reduction of system error by application of digital control and modern sensors are discussed. Preliminary data are presented.

Dube, W. P.↗

NASA NTRS1964

Prediction of mutual diffusion coefficients for thermal conductivity data

Prediction of mutual diffusion coefficients for thermal conductivity data in gases

CONDUCTIVITY↗

NASA NTRS1964

The performance of a double-guarded cold-plate thermal conductivity apparatus.

Double-guarded cold flat plate thermal conductivity measuring apparatus and instrumentation

THERMOCONDUCTIVITY GAUGE↗

NASA NTRS1966

Thermal conductivity of hydrogen from 2000 deg to 4700 deg F

Thermal conductivity of hydrogen from 2000 to 4700 degrees Fahrenheit

HIGH TEMPERATURE RESEARCH↗

NASA NTRS1967

Theory of the thermal conductivity of metals with crystal structure defects

Electron thermal conductivity of non-ideal metals, taking into account arbitrary change and amplitude of electron scattering on ions and phonon spectra deformation by impurities

Yermolayev, A. M.↗

NASA NTRS1968

Thermal conductance of two dimensional eccentric constrictions Interim report

Thermal conductance analysis on heat flow through two dimensional eccentric constrictions

Huerta, M. A.↗

NASA NTRS1968

Thermal conductivity of coated particle uranium dioxide tungsten cermets

Thermal conductivity measurements on tungsten coated uranium dioxide cermets

Grossman, L. N.↗

NASA NTRS1968

Predicted thermal conductivity - Gaseous and liquid para-hydrogen.

Predicted thermal conductivity of gaseous and liquid para hydrogen relationship to viscosity behavior via Enskog theory

Elzinga, D. J.↗

NASA NTRS1967

Thermal conductive connection and method of making same Patent

Thermal conductive, electrically insulated cleavable adhesive connection between electronic module and heat sink

Harper, C. A.↗

NASA NTRS1970

Thermal conductivity of gases - Organic compounds at atmospheric pressure

Thermal conductivity for organic compound gases at atmospheric pressure

Roy, D.↗

NASA NTRS1970

Temperature-dependent thermal conductivities of high-temperature insulations in vacuum

Thermal conductivity of multilayer and mixed powder high temperature insulation systems over wide temperature range and vacuum conditions

Carlson, L. W.↗

NASA NTRS1970

Infrared spectra and radiative thermal conductivity of minerals at high temperatures

Minerals radiative thermal conductivity at high temperatures from IR measurement of absorption coefficient and refractive index

Aronson, J. R.↗

NASA NTRS1969

NERVA irradiation program, GTR test 21. Volume 3 - Thermal conductivity and electrical resistivity of selected NERVA materials

Thermal conductivity and electrical resistivity of materials for NERVA engine - Vol. 3

Bell, J. R.↗

NASA NTRS1970

A traversing-thermocouple technique for the rapid measurement of thermal conductivity in the range 300 to 1200 K

Thermal conductivity rapid measurement in 300-1200 K range using traversing thermocouple technique

Best, R. E.↗

NASA NTRS1970

Direction effect in thermal contact conductance

Thermal conductance of contacts between dissimilar solids with interstitial fluids, calculating heat flow direction effect by double constriction model

Chandra, S.↗

NASA NTRS1971

The Lorenz ratio as a tool for predicting the thermal conductivity of metals and alloys

Metals and alloys thermal conductivity prediction using Lorentz ratio and electrical resistivity measurements

Clark, A. F.↗

NASA NTRS1979

Viscosity and thermal conductivity of model Jupiter atmospheres

The viscosity and thermal conductivity coefficient are estimated for three models of the atmosphere of Jupiter: a heavy model consisting of 22% helium and 78% hydrogen, a nominal model consisting of 11% helium and 89% hydrogen, and a light model consisting of pure hydrogen. The effect of trace elements is neglected. Linearized approximations are used for the transport coefficients of the mixtures; these are found to be in almost constant ratio to the values for pure hydrogen, independent of temperature. Short Basic language programs for computing the coefficients are listed.

Hansen, C. F.↗

NASA NTRS1991

Thermal conductivity of evacuated perlite at low temperatures as a function of load and load history

Perlite, a powdered insulation, is commonly used in large cryogenic storage dewars. When these dewars are thermally cycled, the perlite in the evacuated space between the inner and outer vessels of the dewar experiences a changing mechanical load due to thermal expansion and contraction of the inner vessel. Thermal conductivity data were obtained using a boil-off calorimeter. The apparent thermal conductivity of evacuated perlite increases strongly with applied load. Hysteretic behavior of the conductivity was observed when perlite was subjected to cyclic mechanical loading.

Dube, W. P.↗