265 Matching Results

Search Results

Results: 1 - 24 next
open access

"25" Critically Consultation with J. W. Morfitt : April 3, 1950

Description: Summary: "Criticality was considered impossible in any contingency encountered in practice under either of the following conditions which include no safety factor: (a) In any isolated cylinder not more than 5 in. in disruptor, if the total amount of U235 present does not exceed 7.5 Eg. (b) In an isolated vessel of any shape and size, if the total amount of U235 present does not exceed 880 g. An "isolated" vessel is one which does not "see" more than 0.1 [...] other vessels containing fissionabl… more
Date: April 3, 1950
Creator: Merrill, E. T. & Sege, G.
Partner: UNT Libraries Government Documents Department
open access

100 Areas technical activities report - physics, July 1951

Description: This is the monthly 100 areas technical activities report for the physics group for the month of July 1951. This group was concerned with pile related studies. Work discussed includes neutron attenuation measurements in pile shielding test facilities, studies of physical properties of shielding materials (concrete), work on a xenon generator and separation facility, further development and shielding work for a neutron spectrometer, continued work on a magnetic spectrometer, and counting equipme… more
Date: August 3, 1951
Partner: UNT Libraries Government Documents Department
open access

Acceleration of high-pressure-ratio single-spool turbojet engine as determined from component performance characteristics 2: effect of compressor interstage air bleed

Description: Report presenting an analytical investigation to determine the effect of compressor interstage air bleed with the use of constant-area bleed ports on the acceleration characteristics of a typical high-pressure-ratio single-spool turbojet engine. Constant-area interstage bleed, properly located, gave smaller acceleration times than variable-area compressor exit bleed. Results regarding acceleration with interstage bleed, acceleration using constant-area interstage bleed in combination with compr… more
Date: July 3, 1953
Creator: Rebeske, John J., Jr. & Dugan, James F., Jr.
Partner: UNT Libraries Government Documents Department
open access

Acid Formation in the Radiolysis of Phosphorus Esters

Description: The radiolytic decomposition of tributyl phosphate has been show by burr to product gases, acids, and polymers. the acids that are formed can limit the usefulness of tributyl phosphate for the processing of radioactive materials. The study of acid formation on radiolysis therefor becomes important to us for the understanding of the mechanism of acid formation, the influence of added materials and the effect of the structure of organo- phosphorous compounds. Samples of purified esters have been … more
Date: April 3, 1957
Creator: Baldwin, W. H.
Partner: UNT Libraries Government Documents Department
open access

Additional Experiments on Stored Energy in BNL Reactor Graphite

Description: In the memorandum entitled "Stored Energy in BNL Reactor Graphite", dated February 25, 1953, there is described an experiment conducted by Gurinsky's group to determine the energy per gram of irradiated graphite released in a 200°C anneal. Similar experiments were subsequently conducted by W. Kosiba, differing from the original in two particulars: a) Instead of two graphite samples, one normal, and one irradiated, Kosiba used only an irradiated sample which he heated first to release the stored… more
Date: August 3, 1953
Creator: Mulhern, T.
Partner: UNT Libraries Government Documents Department
open access

Aerodynamic characteristics at Mach number of 4.06 of a typical supersonic airplane model using body and vertical-tail wedges to improve directional stability

Description: Report presenting an investigation at Mach number 4.06 on a typical supersonic airplane model with a 40 degree sweptback wing. The purpose of the investigation was to determine the effectiveness of using wedges on the body and on the vertical tail to increase the static directional stability. Results regarding the longitudinal characteristics and lateral characteristics are provided.
Date: December 3, 1957
Creator: Dunning, Robert W.
Partner: UNT Libraries Government Documents Department
open access

The aerodynamic characteristics at transonic speeds of an all-movable, tapered, 45 degrees sweptback, aspect-ratio-4 tail surface deflected about a skewed hinge axis

Description: From Introduction: "The purpose of the present paper was to determine whether the characteristics about a skewed axis could be predicted from data about the normal angle-of-attack axis, and whether such a configuration offered any aerodynamic advantages over the conventional hinge location normal to the pane of symmetry."
Date: July 3, 1952
Creator: Hammond, Alexander D. & Watson, James M.
Partner: UNT Libraries Government Documents Department
open access

Aerodynamic Characteristics of a Model of an Escape Capsule for a Supersonic Bomber-Type Airplane at a Mach Number of 2.49

Description: Report discussing an investigation of the aerodynamic characteristics of a model of an escape capsule with and without stabilizing fins for a supersonic bomber-type airplane. Lift, drag, longitudinal and lateral stability characteristics, and photographs of the capsule model are presented.
Date: December 3, 1957
Creator: Presnell, John G., Jr.
Partner: UNT Libraries Government Documents Department
open access

Altitude-Chamber Performance of British Roll-Royce Nene II Engine 4: Effect of Operational Variables on Temperature Distribution at Combustion-Chamber Outlets

Description: "Temperature surveys were made at the combustion-chamber outlets of a British Rolls-Royce Nene II engine. The highest mean nozzle-vane and mean gas temperatures were found to occur at a radius approximately 75% of the nozzle-vane length from the inner ring of the nozzle-vane assembly. Variations in engine speed, jet-nozzle area, simulated altitude, and simulated flight speed altered the temperature level but did not materially affect the pattern of radial temperature distribution" (p. 1).
Date: July 3, 1950
Creator: Huntley, Sidney C.
Partner: UNT Libraries Government Documents Department
open access

Altitude Investigation of Can-Type Flame Holder in 20-Inch-Diameter Ram-Jet Combustor

Description: From Introduction: "The combustor efficiency, combustor total-pressure ratio, combustor-outlet total pressure, combustor-inlet Mach number, and specific fuel consumption are presented. The effect of combustor length on efficiency and the effect of pilot operating conditions burning limits are also presented."
Date: June 3, 1954
Creator: Smolak, George R. & Wentworth, Carl B.
Partner: UNT Libraries Government Documents Department
open access

Altitude Investigation of Can-Type Flame Holder in 20-Inchdiameter Ram-Jet Combustor

Description: Memorandum presenting an investigation of a can-type flame holder employing a fuel-air-mixture control sleeve in a 20-inch-diameter ramjet combustor conducted by free-jet and direct-connect techniques at a simulated flight Mach number of 3.0 and altitudes from about 70,000 to 80,000 feet. Results regarding the effect of shortening combustion chamber and effect of pilot-burner variables are provided.
Date: June 3, 1954
Creator: Smolak, George R. & Wentworth, Carl B.
Partner: UNT Libraries Government Documents Department
open access

Altitude Performance of J35-A-17 Turbojet Engine in an Altitude Chamber

Description: "An investigation of the altitude performance characteristics of an Allison J35-A-17 turbojet engines have been conducted in an altitude chamber at the NACA Lewis laboratory. Engine performance was obtained over a range of altitudes from 20,000 to 60,000 feet at a flight Mach number of 0.62 and a range of flight Mach numbers from 0.42 to 1.22 at an altitude of 30,000 feet. The performance of the engine over the range investigated could be generalized up to an altitude of 30,000 feet" (p. 1).
Date: January 3, 1951
Creator: Vincent, K. R. & Gale, B. M.
Partner: UNT Libraries Government Documents Department
open access

Altitude-wind-tunnel investigation of operational characteristics of J47 turbojet engine

Description: Report presenting an investigation in the altitude wind tunnel to determine the operational characteristics of a J47 turbojet engine over a wide range of simulated flight conditions at a range of altitudes. Operational characteristics investigated include operating range, starting, altitude and airspeed compensation of the fuel regulator, and acceleration.
Date: August 3, 1950
Creator: Bloomer, Harry E.
Partner: UNT Libraries Government Documents Department
open access

Aluminum borohydride as an ignition source for turbojet combustors

Description: From Introduction: "Problems associated with the use of aluminum borohydride for ignition in aircraft are discussed. A detailed description of its properties and results of static chamber tests to determine the effect of diluting aluminum borohydride with n-pentane on flammability in dry air are included in this investigation."
Date: September 3, 1953
Creator: Straight, David M.; Fletcher, Edward A. & Foster, Hampton H.
Partner: UNT Libraries Government Documents Department
open access

Analysis of Spurious Modes in Magnet Power Supply

Description: "The resonant frequencies of the magnet power supply are investigated. It is found that there are eleven resonant modes in addition to the desired mode of operation with six additional resonant frequencies. From measurements of the choke model, it appears that the frequencies of some of the spurious modes may lie in the same range as the desired mode of operation."
Date: January 3, 1958
Creator: Dekleva, J. & Robinson, K. W.
Partner: UNT Libraries Government Documents Department
open access

Analysis of two-spool turboprop-engine characteristics

Description: From Introduction: "The purpose of this report is to present the results of an analytical investigation of the engine characteristics of two-spool engines with high over-all compressor pressure ratio (12.0 at design). Some of the turbine design problems encountered in a single-spool engine with current compressor pressure ratio (7.32 at design) were investigated in reference 1. The investigation was extended in reference 2 to cover the effect of mode of engine operation on the turbine design re… more
Date: June 3, 1957
Creator: Davison, Elmer H.
Partner: UNT Libraries Government Documents Department
open access

Analytical investigation of flow through high-speed mixed-flow turbine

Description: From Introduction: "Good experimental correlation of the analytical results was obtained for the compressor even though isentropic flow and axial symmetry were assumed (reference 1). In order to determine the flow through the turbine being investigated, however, it was necessary to extend the method of reference 1 to include the flow downstream of the rooter since the large blade taper and hub-shroud curvature caused downstream conditions which affected the flow inside the rotor."
Date: October 3, 1951
Creator: Stewart, Warner L.
Partner: UNT Libraries Government Documents Department
open access

The Anodizing of Zirconium

Description: Five continuous coatings were produced on zirconium coupons using an anodizing technique. These layers appear to be quite adherent and not subject to visible or audible failure caused by flaxion of the basis metal, Their abrasion resistance, though not investigated thoroughly, appears to be moderately good.
Date: November 3, 1953
Creator: Ray, William E.
Partner: UNT Libraries Government Documents Department
open access

Approximate relative-total-pressure losses of an infinite cascade of supersonic blades with finite leading-edge thickness

Description: From Summary: "By application of a hyperbolic approximation to the form of the bow waves caused by blunt leading edges on an infinite cascade of supersonic blades, the approximate losses in relative total pressure due to the external bow-wave system arising from blunt edges and subsonic axial entrance velocities were computed. The losses increase linearly with leading-edge radius for any given relative Mach number. For a relative Mach number of 1.60, leading-edge radii may be approximately 1.5 … more
Date: March 3, 1950
Creator: Klapproth, John F.
Partner: UNT Libraries Government Documents Department
open access

Automatic Sample Changer

Description: Automatic sample changer developed to increase the number of samples that can be handled daily.
Date: January 3, 1957
Creator: Rankin, M. O. & Harvey, R. A.
Partner: UNT Libraries Government Documents Department
open access

Back-up radioiodine removal facilities, Purex. Project proposal, Revision 1

Description: The purpose of this project proposal revision is to request authorization of total project funds for back-up radioiodine removal and additional nitric acid recovery facilities for the Purex Plant. It is proposed to provide new facilities at the Purex Plant for the further removal of radioiodine from the dissolver off gases and for further recovery of nitric acid. The facility design will be based on meeting iodine emission requirements under 1961 goal conditions. It is expected that the facilit… more
Date: January 3, 1956
Creator: Falk, C. F.
Partner: UNT Libraries Government Documents Department
open access

Basic Concept of the Inert Gas System for Primary Sodium

Description: The design values which were selected and the reasons for selecting them are given for the Fermi Reactor inert gas system. The concept of the system which is to be used to prepare the detailed flow sheet and to design the system components is described. The gas is to be either helium, argon, or nitrogen.
Date: February 3, 1958
Creator: Kendall, W. W. & Chase, W. L.
Partner: UNT Libraries Government Documents Department
open access

Basic Gamma-Ray Data for ART Heat Deposition Calculations

Description: In order that fairly accurate thermal stress calculations can be made on the ART, it is necessary to have a reasonable picture of the temperature distribution in the reactor. To get the temperature distributions, and to determine cooling requirements in various parts of the reactor, one must know the heat deposition rates due to alpha particles, beta rays, gamma rays, and neutrons in all parts of the reactor. The present report contains only the basic physical data necessary to determine the he… more
Date: October 3, 1956
Creator: Bertini, H. W.; Copenhaver, C. M.; Perry, A. M. & Stevenson, R. B.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen