WorldCat Identities

ATLANTIC RESEARCH CORP ALEXANDRIA VA

Overview
Works: 148 works in 197 publications in 1 language and 200 library holdings
Classifications: VK1259,
Publication Timeline
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Most widely held works by ATLANTIC RESEARCH CORP ALEXANDRIA VA
A study of the explosion limits of simple difluoramino compounds( Book )

8 editions published between 1963 and 1965 in English and held by 7 WorldCat member libraries worldwide

Pyrolysis rates for 1,2-bisdifluoraminopropane have been investigated in a Pyrex tubular reactor of high surface area: volume ratio, and in a 200 cc passivated Monel bulb. The measurements of critical pressures for explosion of equimolar 1,2-bisdifluoraminopropane-nitric oxide mixtures have been extended to 443 C. The explosion limit behavior of equimolar propxlene-tetrafluorohydrazine mixtures have been investigated. The analysis of the products of the explosion of 1,2bisdifluoraminopropane has been undertaken. The results are discussed. (Author)
Development of flexible polymers as thermal insulation in solid-propellant rocket motors( Book )

7 editions published between 1961 and 1963 in English and held by 6 WorldCat member libraries worldwide

The objective of this program was to develop flexible polymers which, when suitably filled, would serve as effective case insulation in endburning, solid-propellant rocket motors. Resin systems selected for study were the epoxies, phenolics, polyurethanes, polyesters, furans and melamines. Flexible polymers of all six systems were prepared generally by using internal type plasticizers or modifiers, and to a much lesser extent, by external plasticizers. The insulation performance of promising filled resins were determined by the oxyacetylene torch and static motor firing tests. Mechanical properties, aging properties, and the effect of various fillers and resin composition on insulation performance were determined for a number of the more promising resins. The best insulation developed on the basis of char rate and density was a modified epoxy resin filled with 40% long-fiber asbestos. The resin is prepared from Epon 828, tetrahydrophthalic anhydride, castor oil (1:00:1.07: 1.49). (Author)
Development of High Temperature Resistant Materials for Use in Naval Ordnance( Book )

5 editions published in 1973 in English and held by 4 WorldCat member libraries worldwide

Work continued on the process scale-up to permit the fabrication of filament reinforced graphite composites in sizes up to 16-inch outside diameter. The vacuum chamber was constructed using stainless steel and has been received. The induction coil was fabricated and delivered the middle of May. Furnace components have been scaled-up and will be in operation before the next report period. The scale up furnace includes several desirable features not available in previous fabrication equipment. These include external filament storage to permit the observation of the filament feed system during fabrication, three view ports to permit the visual observation of the fabrication process inside the furnace and arrangements to permit the use of the equipment for subsequent production requirements. A closed water system is being installed to permit furnace operation independent of city water. Individually controlled and monitored gas and water lines in and out of the induction furnace are provided. (Author)
Improvement of the usefulness of pyrolytic graphite in rocket motor applications( Book )

5 editions published between 1961 and 1963 in English and held by 4 WorldCat member libraries worldwide

Tests of coated nozzles were made to measure the inherent serviceability of pyrolytic graphite under severe conditions using an advanced propellant of 6500 F flame temperature. Deposition runs, in which pyrolytic graphite was formed at a low temperature (1340 C) on tubular substrates of three different grades, showed significant differences in the microstructure of the coating. The deposit on a relatively non-graphitic substrate had a finer microstructure than that on the standard graphite substrate. The coating on a high-purity, coarse-grained graphite had a coarser structure. Steam pretreatment of the substrate produced an increase in the cone size in pyrolytic graphite which was probably caused by increased activity of local sites on the substrate surface. Pyrolytic graphite nozzles were tested in three rocket motor firings to define the effect of motor pressure on the erosion rate of the standard (2000 C) coating. A fourth motor test indicated that a lower temperature coating (1700 C) was not serviceable with the 6500 F propellant
CASTABLE CARBON FOR NOZZLE APPLICATIONS( Book )

4 editions published between 1964 and 1965 in English and held by 4 WorldCat member libraries worldwide

An investigation is reported of a unique castable carbon material developed for rocket nozzle applications. The second and third subscale nozzles (for the 5,000 pound thrust motor) were motor tested at the Air Force Rocket Propulsion Laboratory. In the second subscale test, the exit cone was burned off the nozzle after 43 seconds following excessive erosion of the cast carbon immediately aft of the graphite throat insert. The third subscale nozzle, which consisted entirely of cast carbon in a steel housing, performed acceptably. Throat performance was good but uneven erosion aft of the throat produced local gouging in the exit cone. Emphasis will be placed on improved material for the throat and initial expansion area. (Author)
Investigation of air-augmented rocket combustion and mixing processes( Book )

3 editions published between 1967 and 1968 in English and held by 3 WorldCat member libraries worldwide

The results of an experimental and theoretical study of coaxial jet mixing and combustion are presented. The characteristics of a primary stream were systematically varied through a broad range of conditions and the exchange processes occuring in a secondary chamber were observed by means of wall pressure measurements, wall calorimeters and chemical sampling. Primary stream variables studied include temperature (1000-3000K), chemical reactivity (0-400 kcal/100g), particulate matter content (0-50 percent), particle diameter (2,200 microns), radio of gas phase to solid phase reactivity (0-1), primary stream momentum, and exit plane geometry. Secondary stream parameters studied were velocity (500-1000 ft/sec) and temperature (300 - 1000K). Analysis of the data shows that the length of the duct required for momentum and energy exchange is dominated in all instances primarily by secondary air mass flow. The data also show that boron combustion efficiency is highly dependent upon primary and secondary stream temperature. Combustion efficiency data were able to be correlated assuming a diffusion controlled heterogeneouse combustion process. An analytical treatment of a two-phase mixing process in the region of the potential core is presented and wall static pressures computed over this region are compared with experimentally determined trends. (Author)
Evaluation of the Ring Oven Technique for Water Monitoring( Book )

3 editions published between 1974 and 1977 in English and held by 3 WorldCat member libraries worldwide

The feasibility of using spot tests coupled with ring oven separation for the monitoring of selected species in natural water sources was demonstrated, The species selected, and their ranges of interest, were consistent with the analytical requirements of the Preventive Medical Kit. The species investigated included iron, lead, magnesium, zinc, chlorides, fluorides, nitrates and sulphates. Reagents with sufficient sensitivity to determine the feasibility of the ring oven technique were selected for all eight species. Separation procedures were shown to be feasible for six of the eight ions examined. To determine the simplicity and the efficiency of the ring oven procedure when used by a relatively untrained person, a water sample was prepared and successfully analyzed by an individual with no previous experience. (Modified author abstract)
Communications-Electronic Intrasystem Electromagnetic Interference Measurement Technique and Instrumentation( Book )

3 editions published in 1980 in English and held by 3 WorldCat member libraries worldwide

This report presents the results obtained during the first quarter of the Communications-Electronic Intrasystem Electromagnetic Interference Measurement Techniques and Instrumentation project. The period covered was 20 June 1979 to 20 September 1979. The major effort in the first quarter consisted of a literature search, report reviews, site visit to Fort Knox to examine armored vehicles for MIL-STD-461A and -462 evaluation and an initiation of the feasibility of IEMCAP as an EMI/EMC analysis tool for system measurements. (Author)
Feasibility demonstration of pyrolytic graphite coated nozzles( Book )

4 editions published between 1964 and 1965 in English and held by 3 WorldCat member libraries worldwide

The objective of this program is to demonstrate the feasibility of pyrolytic graphite coatings for use in uncooled solid propellant rocket nozzles (in a size range of use for practical propulsion units) under very severe operating conditions. In prior work, the excellent serviceability of pyrolytic graphite coatings in 1/2-inch diameter nozzles was demonstrated with propellants having flame temperatures from 5500F to 6500F. In current work, nozzles of 1.1-inch and 2.3-inch diameter are to be tested with a 6550F propellant. This report describes the work of the third quarter of this program. Improvements were made in preparing crack-free sub-scale coated inserts. Flaw-free coatings as thick as 54 mils were prepared. Application of this improved art to full-scale inserts is underway. Stress analysis indicated the merit of alternate substrate materials and deposition work with these is underway. A successful 35-second sub-scale firing was made but during a 60-second firing discrete coating losses were observed. In the first full-scale motor firing excessive erosion was observed from a coating containing a known separation. This behavior was analogous to early sub-scale experience. (Author)
Behavior of nozzle materials under extreme rocket motor environments by James D Batchelor( Book )

3 editions published between 1964 and 1965 in English and held by 3 WorldCat member libraries worldwide

The program is a research investigation of the behavior of rocket nozzle materials under extreme rocket motor environments. The environments of particular interest are those associated with uncooled nozzle service in advanced or future solid propellant rocket motors. Principal emphasis is placed on graphitic materials, high-melting carbides, and the most refractory metals. Chemical reactions effects of the propellant exhaust environment on these materials are studied as well as thermal and mechanical factors. Methods of reducing or controlling deleterious effects are also of interest. A plasma torch test technique which exposes the bore of a tubular specimen to a high heat flux and a high velocity of selected gas mixtures was conceived and developed
Feasibility study of flotation of sunken vessels by injection of foamed flotation material : final report by C. B Darley( Book )

3 editions published between 1964 and 1965 in English and held by 3 WorldCat member libraries worldwide

Extensive laboratory tests of several foam formulations under both air pressure and water pressure have produced good foams of low density which are not affected by water environments, elevated pressures or low temperature. These foams have maintained adequate cell integrity and resisted cell rupture upon release of external pressure. Photographs are included which show the sequence of foam flotation events as represented by laboratory testing. (Author)
Chemical reactions between propellant gases and nozzle materials( Book )

2 editions published in 1963 in English and held by 2 WorldCat member libraries worldwide

To improve our understanding of the role of chemical reactions in the erosion of rocket nozzle materials, a laboratory study of probable reactions was carried out with graphite and refractory metal carbides. Hemispherical speci mens of AGOT, ZTA, and pyrolytic graphite were exposed to hot gas streams containing nitrogen, argon, carbon monoxide, carbon dioxide, H2O(g) and HCl(g) generated by a plasma torch. Erosion rates were measured over a range of temperatures from 2000 to 3000 K. Under the flow conditions in the torch flame, significant losses were observed with each of the gases. Oxidation by CO2 and H2O(g) was by far the most destructive effect. (Author)
Simplified solutions to the interior ballistic problems of cartridge actuated devices( Book )

1 edition published in 1962 in English and held by 2 WorldCat member libraries worldwide

Research concerns the derivation of approximate analytic solutions to the i erior ballistic equations of cartridge-actuated devices. A unique feature of the system is that linear burning rates need not be as umed. The solutions ar presented in gr phical form, thereby permitting the rapid solution to a variety of ballis ic problems. S EVERAL SAMPLE PROBLEMS ARE INCLUDED. (Au hor)
SYNTHESIS OF RUBBER BY MICROORGANISMS( Book )

3 editions published between 1955 and 1956 in English and held by 2 WorldCat member libraries worldwide

Improved Bodies of Revolution( Book )

1 edition published in 1981 in English and held by 2 WorldCat member libraries worldwide

The aperture loading technique (ALT) is implemented in an aperture coupling body of revolution (BOR) computer code. Apertures of material fill (dielectric, composite, conductive putty, etc.) are amenable to ALT analysis. Thin apertures formed from complex shaped walls, e.g., sleeve-fit seams, also are amenable to ALT analysis. The ALT BOR code is applied to a plane wave excited, missile shaped BOR with a dielectric filled sleeve-fit seam. Interior E-fields and H-fields are mapped. (Author)
Fuel-Rich Solid Propellant Boron Combustion( Book )

3 editions published between 1982 and 1984 in English and held by 2 WorldCat member libraries worldwide

Single particle boron ignition and combustion models developed in earlier phases of this program have been utilized and extended to treatment of boron cloud ignition, oxidizer depletion effects on cloud combustion time, laminar flame speeds in boron dust clouds, agglomerate ignition, and the effects of halogens, lithium fluoride coatings, and metal coatings on particle ignition. In addition, they have been utilized in a modular combustor model (well-stirred reactor followed by a two-dimensional mixing zone) of boron slurry combustion. Critical deficiencies in knowledge of processes of condensation of various boron oxides/hydroxides have been defined and an experiment to better quantify and understand these processes has been designed. An experimental program for definition of kinetics of boron oxide liquid plus water vapor (important to boron particle ignition) has been carried out. A comprehensive data base of ignition and combustion times for small (10 to 50 micron) boron particles in various wet and dry environments has been developed and a limited experimental study of the effects of LiF coatings on boron ignition performed. Finally, experiments aimed at characterizing dominant processes is boron solid-fuel ramjet combustion, utilizing a windowed slab burner, have been accomplished. (Author)
Design and instrumentation of an earth shock tube( Book )

2 editions published between 1962 and 1968 in English and held by 2 WorldCat member libraries worldwide

A system to measure the friction at the sidewall of the earth shock tube has been designed. Four Baldwin-LimaHamilton load cells, one attached at each corner of a flange, will support the suspended shock tube, and hence will indicate the total downward force exerted on the shock tube during application of force to the soil column
Advanced Fuel Systems for Ramjet-Powered Vehicles( Book )

3 editions published between 1969 and 1970 in English and held by 2 WorldCat member libraries worldwide

The major efforts during this reporting period were in completing the sample preparation for all the fuel compatibility screening tests, and in completing the fuel characterization work
Research on the deflagration of high-energy solid oxidizers( Book )

2 editions published in 1965 in English and held by 1 WorldCat member library worldwide

Further experiments have been performed in which the flame temperature above deflagrating hydrazine diperchlorate has been measured with fine thermocouples. A flame temperature of about 1350K is indicated for an ambient pressure of about 20 atmospheres. This is substantially below the theoretical flame temperature of about 1600K. The thermal decomposition of hydrazine diperchlorate has been investigated from 211-291C. The rates of thermal decomposition have been examined and indicate a complex process. Preliminary experiments have been performed on the thermal decomposition of hydrazine diperchlorate-copper chromite mixtures. Ammonium perchlorate has been found in the surface of a strand of hydrazine diperchlorate which had been ignited at an elevated pressure, allowed to deflagrate partially and extinguished by sudden pressure release. Deflagration rate measurements from six to one hundred and thirty atmospheres are reported for pressed hydrazine diperchlorate
A study of extinguishment and control of fires involving hydrazine-type fuels with air and nitrogen tetroxide by M Markels( Book )

2 editions published in 1962 in English and held by 1 WorldCat member library worldwide

Burning rates, extinguishing agents, and extinguishment mechanisms were determined for open pan fires of hydrazine, unsymmetrical dimethylhydrazine (UDMH), JP-X.A 50-50 mixture of hydrazine and UDMH oxidized by air and N2O4 was studied in open pans and in a 1/50 scale model of a Titan II silo. Bicarbonate-based dry chemicals extinguished the pan fires promptly, and with the least weight of agent. Water extinguished the fires by diluting the fuel surface. Course spray and alcohol-type foams were effective forms of water application. After extinguishment by dilution, the fires could not be reignited. Water spray was not effective against JP-X fires because of the separation of a lowdensity, hydrocarbon-rich layer. Specific rates of application or selected agents under various fire conditions are given. The amine fuels (with the exception of JP-X, which was not tested), exploded hypergollically on contact with liquid N2O4 tetroxide in about half the tests
 
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English (67)