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Preparation and physical properties of metal slurry fuels

Description: Report presenting an investigation of the physical properties of slurries and the use of a metal-soap additive to prepare stable slurries of commercial magnesium, aluminum, and boron powders in a MIL-F-5624 grade JP-3 base fuel. Results regarding the slurry density, apparent viscosity, apparent surface tension, stability, and fuel-flow characteristics are provided.
Date: March 18, 1952
Creator: Gibbs, James B. & Cook, Preston N., Jr.
Partner: UNT Libraries Government Documents Department

Starting characteristics and combustion performance of magnesium slurry in 6.5-inch-diameter ram-jet engine mounted in connected-pipe facility

Description: The starting characteristics and combustion performance of slurry type fuels, consisting of 50 percent magnesium powder in a hydrocarbon carrier, have been investigated in a flight-type, 6.5-inch-diameter ram-jet engine in a connected-pipe facility. Quick, dependable starting of the engine was obtained by the use of a disk which blocked part of the combustor area downstream of the flame holder. Acceptable performance was achieved with a short fuel-air mixing length by the development of a fuel-distribution control sleeve.
Date: January 28, 1954
Creator: Gibbs, James B.
Partner: UNT Libraries Government Documents Department

A preliminary study of the preparation of slurry fuels from vaporized magnesium

Description: "Slurry fuels containing extremely small particles of magnesium were prepared by concentrating the dilute slurry product resulting from the shock-cooling of magnesium metal vapors with a liquid hydrocarbon spray. A complete description of the equipment and procedure used in preparing the fuel is given. Ninety-five percent by weight of the solid particles formed by this process passed through a 100-mesh screen. The particle-size distribution of the screened fraction of one run, as determined by sedimentation analysis, indicated that 73 percent by weight of the metal particles were finer than 2 microns in equivalent spherical diameter" (p. 1).
Date: February 4, 1954
Creator: Witzke, Walter R.; Prok, George M. & Walsh, Thomas J.
Partner: UNT Libraries Government Documents Department

NACA research on slurry fuels through 1954

Description: Report presenting a review of NACA research on slurry fuels through 1954. Slurry fuels are defined as suspensions of metals in hydrocarbons, which may offer more flight range or thrust than can be obtained with conventional hydrocarbons. Magnesium is the primary metal of interest at this time for high thrust and boron for long-range flight.
Date: April 21, 1955
Creator: Olson, Walter T. & Breitwieser, Roland
Partner: UNT Libraries Government Documents Department


Description: The production of U/sup 232/ in the cost optimized TBR and oneregion thorlum oxide-uranium oxide slurry reactor has been estimated to be, respectively, 40 and 260 parts per million parts of U/sup 233/ produced. These production rates are compared with corresponding production rates in irradiated thorium rods and found to be comparable. Recommendations are made for increasing the purity of the U/sup 233/ product. (auth)
Date: May 23, 1955
Creator: Dresner, L
Partner: UNT Libraries Government Documents Department

Some Dielectric Properties of Suspensions of Boron Powders in Mineral Oil

Description: Memorandum presenting measurements of the dielectric constant for suspensions of two types of boron powder in mineral oil as a function of concentration of boron particles, moisture content, temperature, and frequency of oscillation. Also investigated were the effects of boron-powder concentration and moisture content on the dielectric losses of mineral-oil suspensions of the two boron powders.
Date: August 18, 1955
Creator: Altshuller, Aubrey P.
Partner: UNT Libraries Government Documents Department

Effect of surface-active additives on physical properties of slurries of vapor-process magnesium

Description: The presence of 3 to 5 percent surface-active additive gave the lowest Brookfield apparent viscosity, plastic viscosity, and yield value that were obtained for slurry fuels containing approximately 50 percent vapor-process magnesium in JP-1 fuel. The slurries settled little and were easily remixed. A polyoxyethylene dodecyl alcohol was the most effective of 13 additives tested in reducing the Brookfield apparent viscosity and the yield value of the slurry. The seven most effective additives all had a hydroxyl group plus an ester or polyoxethylene group in the molecule. The densities of some of the slurries were measured.
Date: November 3, 1955
Creator: Pinns, Murray L.
Partner: UNT Libraries Government Documents Department


Description: Run SM-3 covered 947.4 hours of which 669.2 hours were on slurry. Behavior of the system with slurry concentrations of 200 and 400 g Th/l were explored. Modifications made to the loop since the end of run SM-2 gave a flow of 360 gpm vs 230 gpm previously, and the blanket inlet nozzles were cut down from 2 in. ID to 1 1/2 in. sch 80 pipe, giving a velocity of 35 ft/sec out of the nozzles. The slurry was found to be suspended apparently uniformly in the blanket under the operating conditions and also with the flow reduced to 300 gpm by reducing the alternating current frequency. A further reduction to l97 gpm appeared to give conditions similar to run SM-2, with a much more marked concentration gradient in the blanket. The run was interrupted at 947.4 hr by a pump bearing failure. (auth)
Date: October 15, 1957
Creator: Parsly, L.F. Jr.
Partner: UNT Libraries Government Documents Department


Description: A rough calculation shows that a flux of 10/sup 16/ n/cm/sup 2/ sec can be obtained in the internal thermal column (island) of a reflector-moderated circulating fluoride-fuel reactor. Existing NaZrF/sub 5/ base fuels and a graphite moderator are used. The average power density in the reactor is 1 kw/ cc, and the total pcwer is 444 Mw. Inner radius of the fuel region is 50 cm. (auth)
Date: January 28, 1958
Creator: Ergen, W.K.
Partner: UNT Libraries Government Documents Department


Description: An analysis, based on electrical double-layer concepts, of the influence of surface active agents on ThO/sub 2/ slurry properties indicates that under reactor conditions the use of additives to obtain certain slurry properties such as low yield stress will not be effective. Corrosion ions, fission ions, and ions resulting from radiation will compress the electrical double layer on the particle surface and reduce its dispersing effect. Elevated temperatures will also work against effective double layer properties, primarily through effect on the dielectric constant. Colloidal suspensions under conditions encountered in a reactor are unstable and accordingly stable slurry properties dependent on the surface condition are unlikely to exist. Similar arguments suggest that ceramic or other surface coatings on ThO/sub 2/ particles probably would not strongly influence slurry properties in a reactor. Evidence, ss yet inconclusive, suggests that electrolyte additives, which prevent cake formation in slurries where it otherwise would be expected, act through influence on the rate and nature of primary particle degradation. (auth)
Date: July 15, 1958
Creator: Morgan, C.S.
Partner: UNT Libraries Government Documents Department