Structural research on an impact limiter system for Mars ''hub- and tire-'' type hard landers.
Impact limiter system design for Mars landing vehicle noting balsa wood or phenolic honeycomb construction
Knoell, A. C.↗
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Results for “phenol”
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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Lightweight, high-strength, reinforced plastic tube-franging die
Dies of a phenolic molding compound with chopped glass fibers as fill material possess a flexural strength of 20,000 psi and a compressive strength of 28,500 psi.
Bush, S.↗
Evaluation of the energy transfer in the char zone during ablation. Part 1 - Theoretical and experimental results for heat shield surface temperatures up to 3000 deg F
Energy transfer in reacting flow of pyrolysis products through char layer of nylon-phenolic resin charring ablator
April, G. C.↗
Evaluation of the energy transfer in the char zone during ablation. Part 1 - Theoretical and experimental results for heat shield surface temperatures up to 3000 F Final report
Energy transfer in pyrolysis product flow through char layer of nylon phenolic resin ablator
April, G. C.↗
A dynamic technique for determining the thermal conductivity of charring materials
Thermal conductivity determination for charring materials by dynamic technique, with application to carbon, graphite and silica cloth phenolics
Baker, D. L.↗
Ablative performance of various low-density elastomeric composites
Performance of low density silicone-phenolic and commercial ablative composites
Howell, W. E.↗
Low cost carbonaceous development Final report
Low cost graphite powder and phenolic resin molding compounds for use in rocket engine nozzles
Cardall, S. H.↗
Application of Ablation to a High Chamber Pressure Rocket Engine
Ablation cooling in rocket engine with combustion chamber liner and nozzle constructed of silica phenolic ablative material
Brecheisen, A. W.↗
On chemical reactions in the char zone during ablation
Analysis of reacting flow of pyrolysis products through char layer of low density, nylon phenolic resin, charring ablators and porous graphite
April, G. C.↗
The synthesis and characterization of some potential ablative polymers
Ablative polymers synthesis from formaldehyde, phenols and ethers reaction products, discussing char yield, thermally stable fillers incorporation and thermogravimetric analysis
Eddy, R.↗
High-performance spray-foam insulation for application on Saturn S-II stage
Spray foam insulation for Saturn S-2 stage, consisting of phenolic honeycomb core composite purged with helium
Mack, F. E.↗
Halogenation of microcapsule walls
Procedure for halogenation of confining walls of both gelatin and gelatin-phenolic resin capsules is similar to that used for microencapsulation. Ten percent halogen content renders capsule wall nonburning; any higher content enhances flame-retardant properties of selected internal phase material. Halogenation decreases permeability of wall material to encapsulated materials.
Davis, T. R.↗
Lunar surface engineering properties experiment definition
Research on the mechanics of lunar soils and on developing probes to determine the properties of lunar surface materials is summarized. The areas of investigation include the following: soil simulation, soil property determination using an impact penetrometer, soil stabilization using urethane foam or phenolic resin, effects of rolling boulders down lunar slopes, design of borehole jack and its use in determining failure mechanisms and properties of rocks, and development of a permeability probe for measuring fluid flow through porous lunar surface materials.
Mitchell, J. K.↗
An Implicit Finite Difference Solution to the Viscous Radiating Shock Layer with Strong Blowing
An implicit finite difference scheme is developed for the fully coupled solution of the viscous radiating stagnation line equations, including strong blowing. Solutions are presented for both air injection and carbon phenolic ablation products injection into air at conditions near the peak radiative heating point in an earth entry trajectory from interplanetary return missions. A detailed radiative transport code that accounts for the important radiative exchange processes for gaseous mixtures in local thermodynamic and chemical equilibrium is utilized.
Garrett, L. B.↗
Flight-and ground-test evaluation of pyrrone foams
Two Pyrrone materials, pure Pyrrone foam with a density of 481 kg/cu m and hollow glass microsphere-Pyrrone composite with a density of 962 kg/cu m, were tested in the Langley 20-inch hypersonic arc heated tunnel at pressure levels from 0.06 to 0.27 atm and heating rates from 1.14 to 11.4 MW/sq m. The 481-kg/cu m Pyrrone foam was also flight tested as an experiment aboard a Pacemaker test vehicle. The results of the ground tests indicated that the thermal effectiveness of the 481-kg/cu m Pyrrone foam was superior to the 962-kg/cu m glass sphere-Pyrrone composite. The 481-kg/cu m Pyrrone foam had approximately one-half the thermal effectiveness of low density phenolic nylon. The 481-kg/cu m Pyrrone foam experienced random mechanical char removal over the entire range of test conditions. Char thermal property inputs for an ablation computer program were developed from the ground test data of the 481-kg/cu m Pyrrone foam. The computer program using these developed char thermal properties, as well as the measured uncharred material properties, adequately predicted the in-depth temperature histories measured during the Pacemaker flight.
Mclain, A. G.↗
Development and evaluation of vacuum pressure gauge components from carbon and graphite
A prototype all carbon triode ultrahigh vacuum gage was fabricated and tested. The gage exhibited a sensitivity of 3.7 per torr for nitrogen and an X-ray background approximately 0.1 as large as would be expected of a metal gage of the same design. The gage made from these materials, showed good sensitivity and durability. A practical technique was developed for bonding carbon components together without metal fasteners. The bond is made with a cross-linked phenolic resin which is converted to vitreous carbon by a careful pyrolysis procedure. The resulting bonds are strong, electrically conductive, and can withstand repeated excursions to 2500 K in vacuum. Measurements of adsorption and outgassing characteristics of four refractory carbons have confirmed that such materials are suitable for use in ultrahigh vacuum and that some are superior refractory metals in man respects.
Benson, D. K.↗
An implicit finite-difference solution to the viscous shock layer, including the effects of radiation and strong blowing
An implicit finite-difference scheme is developed for the fully coupled solution of the viscous, radiating stagnation-streamline equations, including strong blowing. Solutions are presented for both air injection and injection of carbon-phenolic ablation products into air at conditions near the peak radiative heating point in an earth entry trajectory from interplanetary return missions. A detailed radiative-transport code that accounts for the important radiative exchange processes for gaseous mixtures in local thermodynamic and chemical equilibrium is utilized in the study. With minimum number of assumptions for the initially unknown parameters and profile distributions, convergent solutions to the full stagnation-line equations are rapidly obtained by a method of successive approximations. Damping of selected profiles is required to aid convergence of the solutions for massive blowing. It is shown that certain finite-difference approximations to the governing differential equations stabilize and improve the solutions. Detailed comparisons are made with the numerical results of previous investigations. Results of the present study indicate lower radiative heat fluxes at the wall for carbonphenolic ablation than previously predicted.
Garrett, L. B.↗
CMB-13 research on carbon and graphite
Research and development are reported on phenolic resin binders, coke flour, binder soaking, hot molding glass-like carbons, and particle packing.
Smith, M. C.↗