Resource Type
Serial/Series Title
NACA Research Memorandums
162
Atomic Energy Commission Reports
52
NACA Technical Reports
35
Oak Ridge National Laboratory Reports
23
Hanford Works Reports
22
University of California Radiation Laboratory Reports
15
HW (Series)
14
ORNL (Series)
9
BNL (Series)
7
Brookhaven National Laboratory Reports
7
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339 Matching Results
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The Effect of Neutron Bombardment on the Specific Heat of Graphite at Low Temperatures
The work described in this technical report was undertaken as part of a larger program dealing with a systematic investigation of changes in the physical prosperities of artificial graphite due to neutron bombardment. Very pronounced among those changes is the increase in the elastic modulus. Since there is a general relationship between the elastic modulus of a given substance and its specific heat, it was expected that corresponding changes will occur in the specific heat. In conclusion, the experiments determined that it appears that the low temperature specific heat measurements of strongly bombarded samples will be helpful for the understanding of the nature and the mechanism of the changes produced by neutron bombardment and annealing.
Date:
September 5, 1945
Creator:
Estermann, I. (Immanuel), 1900-1973 & Kirkland, G. I.
Object Type:
Report
System:
The UNT Digital Library
Effect of Nozzle Secondary Flows on Turbine Performance as Indicated by Exit Surveys of a Rotor
Report presenting detailed circumferential and radial surveys of total pressure and total temperature made downstream of the turbine rotor of a high-speed, high-specific-mass-flow turbine at design operating conditions. The purpose of this testing was to determine the sources and magnitudes of losses in turbines. Results regarding total pressure ratio, total-temperature-drop ratio, contours of efficiency, and location of the losses are provided.
Date:
April 5, 1954
Creator:
Whitney, Warren J.; Buckner, Howard A., Jr. & Monroe, Daniel E.
Object Type:
Report
System:
The UNT Digital Library
Effect of Several Wing Modifications on the Subsonic and Transonic Longitudinal Handling Qualities of the Douglas D-558-II Research Airplane
Memorandum presenting the subsonic and transonic longitudinal handling qualities of the Douglas D-558-II research airplane with several wing modifications designed to alleviate swept-wing instability and pitch-up. The airplane configurations investigated included the basic wing configuration and two wing-fence configurations in combination with retracted, free-floating, or extended slat,s and a wing leading-edge chord-extension configuration.
Date:
June 5, 1956
Creator:
Fischel, Jack & Reisert, Donald
Object Type:
Report
System:
The UNT Digital Library
The effect of thickness ratio on section thrust distribution as determined from a study of wake surveys of the NACA 4-(0)(03)-045 and 4-(0)(08)-045 two-blade propellers up to forward Mach numbers of 0.925
Report presenting testing of two two-blade propellers in the 8-foot high-speed tunnel for a range of blade angles and Mach numbers. The results show that changes in thrust loading due to compressibility effects were much smaller for the thin-blade propeller than for the thick-blade propeller.
Date:
April 5, 1951
Creator:
Harrison, Daniel E. & Milillo, Joseph R.
Object Type:
Report
System:
The UNT Digital Library
Effect of Various Blade Modifications on Performance of a 16-Stage Axial-Flow Compressor 2 - Effect on Over-All Performance Characteristics of Increasing Twelfth through Fifteenth Stage Stator-Blade Angles 3 Degrees
The stator-blade angles in the twelfth through fifteenth stages of a 16-stage axial-flow compressor were increased 3O. The over-all performance of this modified compressor is compared to the performance of the compressor with original blade angles. The matching characteristics of the modified compressor and a two-stage turbine were obtained and compared to those of the compressor with original blade angles and the same turbine.
Date:
January 5, 1952
Creator:
Hatch, James E. & Medeiros, Arthur A.
Object Type:
Report
System:
The UNT Digital Library
Effect of Water on Carbon Monoxide-Oxygen Flame Velocity
"The flame velocities were measured of 20 percent oxygen and 80 percent carbon monoxide mixtures containing either light water or heavy water. The flame velocity increased from 34.5 centimeters per second with no added water to about 104 centimeters per second for a 1.8 percent addition of light water and to 84 centimeters per second for an equal addition of heavy water. The addition of heavy water caused greater increases in flame velocity with equilibrium hydrogen-atom concentration than would be predicted by the Tanford and Pease square-root relation" (p. 1).
Date:
February 5, 1954
Creator:
McDonald, Glen E.
Object Type:
Report
System:
The UNT Digital Library
Effect on Transonic and Supersonic Drag of a Fuselage Protuberance of an Essential Unswept Wing-Fuselage Combination
"An investigation of the effect on transonic and supersonic drag of a fuselage protuberance designed to improve the overall longitudinal distribution of cross-sectional area of an essentially unswept wing-fuselage combination has been made with free-flight rocket models. The wing-fuselage configuration was tested with and without a fuselage protuberance designed to relieve the steep area gradient over the rear portion of the wing" (p. 1).
Date:
January 5, 1954
Creator:
Sandahl, Carl A.
Object Type:
Report
System:
The UNT Digital Library
Effects of a Series of Inboard Plan-Form Modifications on the Longitudinal Characteristics of Two Unswept Wings of Aspect Ratio 3.5, Taper Ratio 0.2, and Different Thickness Distributions at Mach Numbers of 1.61 and 2.01
Report of an investigation to determine the effects of inboard plan-form modifications on two unswept wings at Mach numbers 1.61 and 2.01. The only difference between the two wings was the spanwise thickness distribution. The modifications were performed by means of inserting sections that linearly extended the local chord from the 40 percent semispan station to the model center line.
Date:
February 5, 1954
Creator:
Sevier, John R., Jr.
Object Type:
Report
System:
The UNT Digital Library
The effects of boundary-layer control on the longitudinal characteristics of a swept-back wing using suction through streamwise slots in the outboard portion of the wing
Report presenting an investigation to determine the effects of a simplified form of boundary-layer control on the low-speed longitudinal characteristics of a sweptback wing. The primary objective was to improve the longitudinal characteristics of the sweptback wing at lift coefficients below the maximum. Results regarding the characteristics of the wing without boundary-layer control and effects of boundary-layer control are provided.
Date:
January 5, 1951
Creator:
McCormack, Gerald M. & Tolhurst, William H., Jr.
Object Type:
Report
System:
The UNT Digital Library
Effects of Major Parameters on Cycle Efficiency and Cost for a Gas-Cooled Reactor Turbine Power Plant
Cycle study performed on a closed loop Brayton cycle incorporating a gas-cooled nuclear reactor, regeneration, and compressor intercooling. The purpose of the study was to determine the effect of various cycle parameters on efficiency and cost.
Date:
October 5, 1962
Creator:
Miskell, R. V.
Object Type:
Report
System:
The UNT Digital Library
The effects of nacelles and of extended split flaps on the longitudinal characteristics of a wing-fuselage-tail combination having a wing with 40 degrees of sweepback and an aspect ratio of 10
Report presenting an investigation to evaluate the effects of nacelles and extended split flaps on the longitudinal characteristics of a wing-fuselage-tail combination of a type believed to be suitable for long-range high-speed airplanes. Wind tunnel tests to study the effects of the nacelles and flaps were conducted at a range of Mach and Reynolds numbers. Results regarding the effects of the nacelles with the tail off, effects of tail height, effects of nacelles with the tail on, and effects of flaps are provided.
Date:
June 5, 1953
Creator:
Tinling, Bruce E. & Lopez, Armando E.
Object Type:
Report
System:
The UNT Digital Library
The effects of oscillation amplitude and frequency on the experimental damping in pitch of a triangular wing having an aspect ratio of 4
Memorandum presenting the results of a wind-tunnel investigation of the damping in pitch of a model triangular wing with an aspect ratio of 4 combined with a slender pointed body. The investigation was conducted at Mach numbers from 0.10 to 0.95 for Reynolds numbers of 550,000 and 1,250,000 with additional data obtained at Reynolds numbers of 3,000,000 and 6,000,000 at Mach number 0.23. Results regarding the effects of oscillation amplitude, Mach number, Reynolds number, angle of attack, frequency, and pitching axis position are provided.
Date:
September 5, 1952
Creator:
Beam, Benjamin H.
Object Type:
Report
System:
The UNT Digital Library
Effects of simulated skin wrinkles on the wing surface on the aerodynamic characteristics of two wing-body combinations employing wings of low aspect ratio at subsonic and supersonic speeds
Report presenting the results of an investigation to determine the effects of simulated skin wrinkling of the wing surface on the aerodynamic characteristics of two wing-body combinations. The lift, drag, and pitching moment of a low-wing wing-body combination with a plane triangular wing of aspect ratio 3 are presented for a range of Mach and Reynolds numbers.
Date:
August 5, 1952
Creator:
Heitmeyer, John C. & Smith, Willard G.
Object Type:
Report
System:
The UNT Digital Library
Effects of Surface Roughness and Extreme Cooling on Boundary-Layer Transition for 15 Degrees Cone-Cylinder in Free Flight at Mach Numbers to 7.6
Report presenting an investigation of three cone-cylinder bodies to obtain boundary-layer-transition data at very low ratios of wall to local stream temperature. Surface finishes at several levels of roughness height were tested. Results regarding the smooth body and rough bodies are provided.
Date:
March 5, 1958
Creator:
Rabb, Leonard & Krasnican, Milan J.
Object Type:
Report
System:
The UNT Digital Library
Effects of variations in combustion-chamber configuration on ignition delay in a 50-pound-thrust rocket
Ignition delays of a diallylaniline-triethylamine mixture and of triethyl trithioposphite with red fuming nitric acid were measured as a function of combustor dimensions, initial propellant temperature, and initial ambient pressure. Ignition delay increased with exhaust-nozzle diameter. Ignition delay also increased as propellant temperature decreased, but did not vary with initial ambient pressure except with the largest nozzle diameter. A correlation among ignition delay, combustor dimensions, and propellant temperature is presented, and the extension of the correlation to other systems is discussed.
Date:
October 5, 1956
Creator:
Ladanyi, Dezso J.
Object Type:
Report
System:
The UNT Digital Library
Efficiency pf Multiple Traversal Targets
The efficiency of multiple traversal targets is defined as the probability that a proton dies by making a nuclear collision in the target rather than by hitting the limit of the synchrotron aperture. The efficiencies of Be, Al, Cu, and Pb targets are shown for 15 and 30-Bev protons in the Brooknaven AGS. Beryllium was found to be the most efficient. (M.C.G.)
Date:
February 5, 1962
Creator:
Courant, E.D.
Object Type:
Report
System:
The UNT Digital Library
Electrical Limitations To Energy Resolution In Semiconductor Particle Detectors
Based on the assumption that the noise contribution of a semiconductor detector is due solely to the bulk properties of the semiconductor, equations are presented which indicate the theoretical limits of noise in detector-amplifier combinations. These equations show that an optimum amplifier time constant and detector bias voltage exist for which condition the minimum noise is independent of the semiconductor resistivity. The optimum performance of a detector-amplifier system is shown to depend only upon detector area, input capacity (less detector capacity), semiconductor minority carrier lifetime, and the transconductance of the amplifier input tube. A new detector structure including a guard-ring electrode as an integral part of the detector structure is described which largely eliminates noise due to surface leakage. Experimental results for detector leakage and energy resolution are presented which agree well with theory.
Date:
April 5, 1961
Creator:
Hansen, William L. & Goulding, Frederick S.
Object Type:
Report
System:
The UNT Digital Library
Electrical Resistivity of Rare-Earth Alloys
From abstract: "Resistivities of solid solution alloys in the systems Gd-Lu, Tb-Lu, Gd-Er, and Y-Lu were measured from 4.2-320°K to determine the behavior of the resistivity in alloy systems with magnetic phenomena arising from localized magnetic moments. A large contribution to the residual resistivity is caused by the random distribution of these localized moments through the lattice. An analysis of the lattice resistivity of the metals shows large variations across the heavy rare-earth series which are possibly correlated with the change of c/a ratio of the metals and the attendent changes in the Fermi surface geometry."
Date:
June 5, 1962
Creator:
Smidt, F. A. & Daane, A. H. (Adrian Hill), 1919-
Object Type:
Report
System:
The UNT Digital Library
Engine performance of precision-forged, electropolished and machined blades of Nimonic 80 and 80A alloys
An investigation was conducted to determine the effect of electropolishing precision-forged blades and of machining blades from oversize forgings on the engine performance of Nimonic 80 and Nimonic 80A turbine blades. These blades, along with precision-forged blades, were run in a J33-9 turbojet engine. The tests resulted in the following conclusions: (1) Electropolishing of precision-forged blades did not improve engine life relative to the life of nonelectropolished blades. (2) Machining blades from oversize forgings did not improve the engine life of precision-forged blades. (3) The precision-forging and heat-treating practice used in fabricating the blades investigated was such that the surface roughness and oxide penetration was so slight, approximately 0.0005 inch in depth, as to preclude any benefits derived from surface removal by electropolishing or machining.
Date:
April 5, 1955
Creator:
Sikora, Paul F. & Johnston, James R.
Object Type:
Report
System:
The UNT Digital Library
EURATOM PROGRAM "Improved Zirconium Alloys"
Introduction: "This report is an expanded version of the regular monthly letter report and is prepared in this form with the intention of reviewing work on the subject program for Euratom technical personnel. Work performed during the month of September, which normally constitutes the entire letter report, has been condensed under one heading."
Date:
October 5, 1960
Creator:
Weinstein, Daniel & Van Thyne, R. J.
Object Type:
Report
System:
The UNT Digital Library
Eurochemic Assistance Program: Status Report as of April 1, 1959
Considerable delay has occurred in getting ratification of the Eurochemic charter by 80% of the participating nations. The French, who were not expected to ratify the charter until an elected government was again established , actually ratified under de Gaulle late in 1958.
Date:
May 5, 1959
Creator:
Nicholson, E. L.
Object Type:
Report
System:
The UNT Digital Library
Eurochemic Information Exchange- Answers to Specific Questions
A number of the questions which have been posed to us in the subject references are commented upon below. These have been reviewed by personanel of the Research and Engineering Operation and the Facilities Engineering Operation, Chemical Processing Department, and of the Chemical Research and Development Operation, Hanford Laboratories Operation. Particular acknowledment is given G. J Alkire, J. P. Duckworth, J. B. Fecht, R. G. Geier, E. R. Irish, H. M. Jones, G. C. Oberg, A. M. Platt, W. H. Reas, W. C. Schmidt, R. J. Sloat, W. H. Swift, M. T. Walling and L. L. Zahn of these organizations for assistance given assembling this information.
Date:
May 5, 1959
Creator:
Hill, O. F.
Object Type:
Report
System:
The UNT Digital Library
Evaluation of Aluminum for use in Reactors Cooled by High-Temperature Recirculating Water
aluminum has been considered as a material for cladding fuel elements to be used in reactors cooled by high-temperature recirculating water. Aluminum is abundant, chap, has a relatively low cross section for thermal neutrons, and is readily fabricated into complex shapes. For these reasons, it appears that the use of aluminum rather than steel, Zircaloy or other candidate materials for fuel element cladding, would result in considerable savings in operating expense. The actual economics will of course depend on specific factors such as core materials and design of the reactor/. Aluminum appears particularly attractive for cladding the cores of aluminum-plutonium alloy proposed for the Plutonium Recycle Test Reactor since, in this case, the physical characteristics of the core and cladding would be practically identical.
Date:
April 5, 1960
Creator:
Ayres, J. A.
Object Type:
Report
System:
The UNT Digital Library
Evaluation of Fretting Corrosion of ZR-2
Although the corrosion of resistance of Zircaloy--2 clad fuel elements in high temperature water is excellent, some concern has been expressed in regard to the resistance against fretting corrosion. Since this form of corrosion can proceed quite rapidly it could induce fuel element failure through penetration of the cladding. Fretting corrosion if it occurred, would take place either where the fuel element contacted the process tube or where portions of the fuel element contacted each other, e. g. wire-wrapping around a cluster of cylindrical fuel rods. This form of corrosion is defined as corrosion occurring at contact areas and as such, fretting of Zircaloy-2 could take place in many reactor concepts. This report details the results of testing performed to induce fretting corrosion of Zircaloy-2 and the direction of the future tests.
Date:
February 5, 1960
Creator:
Lobsinger, R. J.
Object Type:
Report
System:
The UNT Digital Library