Evaluation of a quartz - Fiberfrax heat shield at high radiative heating rates
Quartz-Fiberfrax heat shield tests for Thor booster at high radiative heating rates, noting optimum material performance dependence on loose stitching
Corea, V. A.↗
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Results for “heating”
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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Heat transfer to solid-vapor mixtures of cryogens below their triple points flowing through heated tubes
Wall temperatures and heat transfer coefficients for solid-vapor mixtures of para hydrogen and nitrogen flowing in heated tube
Giarratano, P. J.↗
Analytical and experimental study of compressible laminar flow heat transfer and pressure drop of a gas in a uniformly heated tube
Numerical solutions of compressible laminar boundary layer heat transfer and pressure drop of gas in uniformly heated tube
Presler, A. F.↗
Subcooled- and net-boiling heat transfer to low-pressure water in electrically heated tubes
Experimental data on subcooled and net-quality boiling heat transfer to low pressure water in electrically heated tubes
Stone, J. R.↗
Heat sink capability of jet A fuel - Heat transfer and coking studies
Heat sink capabilities of Jet-A fuel - heat transfer and coking studies
Ackerman, G. H.↗
Heat transfer to pool-boiling mercury from horizontal cylindrical heaters at heat fluxes up to burnout
Horizontal cylindrical heaters heat transfer to pool boiling Hg at heat fluxes up to burnout
Colver, C. P.↗
Fabrication and testing of tungsten heat pipes for heat pipe cooled reactors
Li-filled vacuum-deposited W heat pipes for efficient heat extraction from nuclear reactors, discussing design, fabrication and testing
Bacigalupi, R. J.↗
Effects of roughness on heating and boundary-layer transition. Part 2: effects of discrete roughness on heating
A preliminary investigation on the effects of roughness on heating in delta wing orbiters was conducted on the windward surface of the vehicle. The purpose of the experiment was to determine the feasibility of using parametric relationships obtained from discrete roughness effects on heating in flat plates and cones, to complex shuttle configurations. An attempt was also made to characterize what parameters were needed to influence roughness. Experimental results show that effective roughness Reynolds numbers are less than or equal to those of flat plates at the same edge Mach number, but, the roughness correlations for plates and cones cannot be applied to the shuttle configuration.
Mateer, G. G.↗
Microfog lubricant application system for advanced turbine engine components, phase 2. Tasks 3, 4 and 5: Wettability and heat transfer of microfog jets impinging on a heated rotating disc, and evaluation of reclassifying nozzles and a vortex mist generator
The wettabilities and heat transfer rates of microfog jets (oil-mist nozzle flows) impinging on a heated rotating disc were determined under an inert atmosphere of nitrogen at temperatures ranging from 600 to 800 F. The results are discussed in relation to the various factors involved in the microfog lubricant application systems. Two novel reclassifying nozzles and a vortex mist generator were also studied.
Shim, J.↗
Gamma heating in reflector heat shield of gas core reactor
Heating rate measurements made in a mock-up of a BeO heat shield for a gas core nuclear rocket engine yields results nominally a factor of two greater than calculated by two different methods. The disparity is thought to be caused by errors in neutron capture cross sections and gamma spectra from the low cross-section elements, D, O, and Be.
Lofthouse, J. H.↗
Vaporization characteristics of carbon heat shields under radiative heating.
Study of the vaporization characteristics of samples of ATJ graphite, a material that has been considered for use on a Jovian probe. These samples were subjected to radiative heating loads of approximately 2 kW/sq cm in argon atmospheres of pressures from 0.00046 to 1 atm. Surface temperatures, mass loss rates, and spatially resolved emission spectral data were recorded. These data are analyzed to determine carbon vapor pressure as a function of temperature and are compared with current models for the vapor pressure of carbon. The effects of finite vaporization (i.e., nonequilibrium) rates are considered and compared with experiment. Estimates of the heat of vaporization from an energy balance are also presented.
Davy, W. C.↗
PAET entry heating and heat protection experiment.
A description is given of the thermal characterization of two low-density (270 and 450 kg/cu cm) elastomeric silicone ablators determined during the entry of the NASA Ames Planetary Atmosphere Experiments Test (PAET) vehicle into the earth's atmosphere. The spacecraft configuration, entry parameters, and associated trajectory variables are presented. Measurements of both the surface convective heat transfer rate and pressure on the beryllium nose cap are shown to be within 5% of theory. The predicted and measured internal temperatures are compared at various depths in the forebody and afterbody heat shields. Significant differences observed between experiment and theory for the afterbody thermal response are examined in relation to existing laboratory data.
Vojvodich, N. S.↗
Evaluation of coated columbium alloy heat shields for space shuttle thermal protection system application. Volume 2, phase 2: Subsize heat shield and small size TPS evaluation
Initially a trade study was conducted of seven heat shield configurations. These were evaluated for structural reliability, fabricability, weight, inspectability, and refurbishability. Two concepts, a tee-stiffened and an open corrugation, were selected as offering the most potential for system success. Fourteen subsize heat shields of a full scale section were fabricated from C-129Y and Cb-752 and silicide coated with R-512E. These subsize panels were subjected to a simulated flight profile representing temperature, local surface pressures, and applied pressure differential loads. All corrugated panels of both alloys sustained 100 cycles without structural or coating failure. All Cb-752/R-512E panels performed well with one panel being successfully repaired after 66 cycles and completing 100 cycles. As a result of this evaluating the Cb-752/R-512E system was selected for hardware application during the subsequent phases. In addition, the tee-stiffened configuration was selected for further development and application in Phase III. This selection was based on an overall assessment of relative weight, cost, and structural performance of the tee-stiffened and open corrugation TPS.
Black, W. E.↗
Calculation procedure for transient heat transfer to a cooled plate in a heated stream whose temperature varies arbitrarily with time
Heat transfer equations have been developed to calculate surface temperature and surface heat flux for cooled flat plate when temperature of fluid passing over leading edge varies arbitrarily.
Sucec, J.↗
Energy Conversion Alternatives Study (ECAS), General Electric Phase 1. Volume 3: Energy Conversion subsystems and components. Part 2: Primary heat input systems and heat exchangers
Primary heat input systems and heat exchangers were evaluated for advanced energy conversion systems. Results are presented and discussed.
Corman, J. C.↗
Performance and heat transfer characteristics of the laser-heated rocket - A future space transportation system
The application of advanced liquid-bipropellant rocket engine analysis techniques has been utilized for prediction of the potential delivered performance and the design of thruster wall cooling schemes for laser-heated rocket thrusters. Delivered specific impulse values greater than 1000 lbf-sec/lbm are potentially achievable based on calculations for thrusters designed for 10-kW and 5000-kW laser beam power levels. A thruster wall-cooling technique utilizing a combination of regenerative cooling and a carbon-seeded hydrogen boundary layer is presented. The flowing carbon-seeded hydrogen boundary layer provides radiation absorption of the heat radiated from the high-temperature plasma. Also described is a forced convection thruster wall cooling design for an experimental test thruster.
Shoji, J. M.↗
Passive heat exchanger for solar heating
Requirements for design, manufacture, installation, and performance of passive heat-exchanger module with auxiliary heaters for use with solar-heating systems are described.
Source record↗
Prototype solar heated hot water systems and double-walled heat exchangers: A collection of quarterly reports
The plan schedule and status of multiple objectives to be achieved in the development, manufacture, installation, and maintenance of two solar heated hot water prototype systems and two heat exchangers are reported. A computer program developed to resolve problems and evaluate system performance is described.
Source record↗