The Hydrolysis of Tributyl Phosphate Ad Its Effect on the Purex Process (open access)

The Hydrolysis of Tributyl Phosphate Ad Its Effect on the Purex Process

From abstract: "The rate of hydrolysis of TBP and the effect of the hydrolysis products in the Purex Process have been studied. Hydrolytic conditions may be encountered in the process which would lead to formation of dibutyl phosphoric acid, causing significant losses of tetravalent plutonium in stripping. This situation may be easily alleviated by reducing and stripping the plutonium in the trivalent state."
Date: December 13, 1951
Creator: Reilly, V. J. & Lanham, W. B.
System: The UNT Digital Library
Effectiveness of Thermal-Pneumatic Airfoil-Ice-Protection System (open access)

Effectiveness of Thermal-Pneumatic Airfoil-Ice-Protection System

From Summary: "Icing and drag investigations were conducted in the NACA Lewis icing research tunnel employing a combination thermal-pneumatic de-icer mounted on a 42-inch-chord NACA 0018 airfoil. The de-icer consisted of a 3-inch-wide electrically heated strip symmetrically located about the leading edge with inflatable tubes on the upper and lower airfoil surfaces aft of the heated area. The entire de-icer extended to approximately 25 percent of chord. A maximum power density of 9.25 watts per square inch was required for marginal ice protection on the airfoil leading edge at an air temperature of 00 F and an airspeed of 300 miles per hour."
Date: April 13, 1951
Creator: Gowan, William H., Jr. & Mulholland, Donald R.
System: The UNT Digital Library
Lift, drag, and pitching moment of low-aspect-ratio wings at subsonic and supersonic speeds : plane triangular wing of aspect ratio 3 with NACA 0003-63 section (open access)

Lift, drag, and pitching moment of low-aspect-ratio wings at subsonic and supersonic speeds : plane triangular wing of aspect ratio 3 with NACA 0003-63 section

Report presenting a wing-body combination with a plane triangular wing of aspect ratio 3 and NACA 0003-63 sections in streamwise planes at subsonic and supersonic Mach numbers. Lift, drag, and pitching moment are presented for a range of Mach and Reynolds numbers.
Date: September 13, 1951
Creator: Heitmeyer, John C.
System: The UNT Digital Library
A Relation of Wind Shear and Insolation to the Turbulence Encountered by an Airplane in Clear-Air Flight at Low Altitudes (open access)

A Relation of Wind Shear and Insolation to the Turbulence Encountered by an Airplane in Clear-Air Flight at Low Altitudes

Memorandum presenting the observed gust experience of an airplane and information on the associated meteorological conditions to obtain a simple empirical relation for estimating the intensity of turbulence in the earth's friction layer. The relation does not discriminate between differences in turbulence intensity resulting from variations of flight altitude or diurnal variations of turbulence.
Date: September 13, 1951
Creator: Thompson, James K.
System: The UNT Digital Library
Calculated effects of turbine rotor-blade cooling-air flow, altitude, and compressor bleed point on performance of a turbojet engine (open access)

Calculated effects of turbine rotor-blade cooling-air flow, altitude, and compressor bleed point on performance of a turbojet engine

Effects of air-cooling turbine rotor blades on performance of a turbojet engine were calculated for a range of altitudes from sea level to 40,000 feet and a range of coolant flows up to 3 percent of compressor air flow, for two conditions of coolant bleed from the compressor. Bleeding at required coolant pressure resulted in a sea-level thrust reduction approximately twice the percentage coolant flow and in an increase in specific fuel consumption approximately equal to percentage coolant flow. For any fixed value of coolant flow ratio the percentage thrust reduction and percentage increase in specific fuel consumption decreased with altitude. Bleeding coolant at the compressor discharge resulted in an additional 1 percent loss in performance at sea level and in smaller increase in loss of performance at higher altitudes.
Date: August 13, 1951
Creator: Arne, Vernon L. & Nachtigall, Alfred J.
System: The UNT Digital Library
Preliminary Investigation of the Transfer of Heat From a Flat Plate at a Mach Number of 1.5 (open access)

Preliminary Investigation of the Transfer of Heat From a Flat Plate at a Mach Number of 1.5

"Surface temperatures and heat transfer to the air stream have been measured for turbulent flow over a flat plate at a Mach number of 1.5 and at a Reynolds number, based on the momentum thickness of the boundary layer, of approximately 5000. Preliminary data are presented and the surface heat-transfer coefficients calculated from these data are considered to be accurate to plus or minus 2.6 percent at a temperature potential of 50 degrees Fahrenheit. These data are in good agreement with the results produced by applying modifications obtained from published information to existing subsonic theories" (p. 1).
Date: December 13, 1951
Creator: Emmons, M. A., Jr. & Blanchard, R. F.
System: The UNT Digital Library
Aerodynamic Characteristics of Tapered Wings Having Aspect Ratios of 4, 6, and 8, Quarter-Chord Lines Swept Back 45 Degrees, and NACA 63(Sub 1)a012 Airfoil Sections: Transonic-Bump Method (open access)

Aerodynamic Characteristics of Tapered Wings Having Aspect Ratios of 4, 6, and 8, Quarter-Chord Lines Swept Back 45 Degrees, and NACA 63(Sub 1)a012 Airfoil Sections: Transonic-Bump Method

Report presenting testing of a series of three wings over a range of Mach numbers by the use of the transonic-bump technique. The lift, drag, pitching-moment, and root-bending-moment data of wings of a variety of aspect ratios but with the same quarter-chord lines and airfoil sections were obtained.
Date: June 13, 1951
Creator: Polhamus, Edward C. & King, Thomas J., Jr.
System: The UNT Digital Library
Wire cloth as porous material for transpiration-cooled walls (open access)

Wire cloth as porous material for transpiration-cooled walls

The permeability characteristics and tensile strength of a porous material developed from stainless-steel corduroy wire cloth for use in transpiration-cooled walls where the primary stresses are in one direction were investigated. The results of this investigation are presented and compared with similar results obtained with porous sintered metal compacts. A much wider range of permeabilities is obtainable with the wire cloth than with the porous metal compacts considered and the ultimate tensile strength in the direction of the primary stresses for porous materials produced from three mesh sizes of wire cloth are from two to three times the ultimate tensile strengths of the porous metal compacts.
Date: November 13, 1951
Creator: Eckert, E. R. G.; Kinsler, Martin R. & Cochran, Reeves P.
System: The UNT Digital Library
Low-Speed Characteristics of a 45 Degree Swept Wing with Leading-Edge Inlets (open access)

Low-Speed Characteristics of a 45 Degree Swept Wing with Leading-Edge Inlets

Memorandum presenting an investigation to determine the low-speed aerodynamic characteristics of a 45 degree swept wing with leading-edge inlets. The wing had a constant chord and completely spanned the wind tunnel. Results regarding surface-pressure characteristics, lift and pitching-moment characteristics, wake-drag characteristics, and internal-flow characteristics are provided.
Date: August 13, 1951
Creator: Dannenberg, Robert E.
System: The UNT Digital Library
Effect of Section Thickness and Trailing-Edge Radius on the Performance of NACA 65-Series Compressor Blades in Cascade at Low Speeds (open access)

Effect of Section Thickness and Trailing-Edge Radius on the Performance of NACA 65-Series Compressor Blades in Cascade at Low Speeds

Report presenting tests of NACA 65-series compressor blades cambered to an isolated airfoil lift coefficient of 1.2 at several maximum section thicknesses to obtain the effect of maximum section thickness on section operating characteristics. Information about surface pressure trends, design angle-of-attack selection, drag, operating range, and critical Mach number is also provided. Changing the section thickness was not found to significantly affect the design angle of attack selected.
Date: December 13, 1951
Creator: Herrig, L. Joseph; Emery, James C. & Erwin, John R.
System: The UNT Digital Library
Aerodynamics of slender bodies at Mach number of 3.12 and Reynolds numbers from 2 x 10(exp 6) to 15 x 10(exp 6) 1: body of revolution with near-parabolic forebody and cylindrical afterbody (open access)

Aerodynamics of slender bodies at Mach number of 3.12 and Reynolds numbers from 2 x 10(exp 6) to 15 x 10(exp 6) 1: body of revolution with near-parabolic forebody and cylindrical afterbody

An experimental investigation of the aerodynamic characteristics of a slender, square-based body of revolution was conducted at a Mach number of 3.12 for angles of attack from 0 degree to 10 degrees and for Reynolds numbers from 2 x 10(exp 6) to 15 x 10(exp 6). Boundary-layer measurements at zero angle of attack are compared with several compressible flow formulating for predicting boundary-layer characteristics. Comparison of experimental pressure and force values with theoretical values showed good agreement for low angles of attack. The measured mean skin-friction coefficients agreed well with those predicted by Mangler's transformation for laminar flow over cones.
Date: November 13, 1951
Creator: Jack, John R. & Burgess, Warren C.
System: The UNT Digital Library
Force and pressure characteristics for a series of nose inlets at Mach numbers from 1.59 to 1.99 5: analysis and comparison on basis of ram-jet aircraft range and operational characteristics (open access)

Force and pressure characteristics for a series of nose inlets at Mach numbers from 1.59 to 1.99 5: analysis and comparison on basis of ram-jet aircraft range and operational characteristics

Performance of four experimentally investigated axially symmetric spike-type nose inlets is compared on basis of ram-jet-engine aircraft range and operational problems. At design conditions, calculated peak engine efficiencies varied 25 percent from the highest value which indicates importance of inlet design. Calculations for a typical supersonic aircraft indicate possible increase in range if engine is flown at moderate angle of attack and result in engine lift utilized. For engines with fixed exhaust nozzle, propulsive thrust increases with increasing heat addition in subcritical flow region in spite of increasing additive drag. For the perforated inlet there is a range of increasing total-temperature ratios in subcritical flow region that does not yield an increase in propulsive thrust. Effects of inlet characteristics on speed stability of a typical aircraft for three types of fuel control is discussed.
Date: September 13, 1951
Creator: Howard, E.; Luidens, R. W. & Allen, J. L.
System: The UNT Digital Library
Wing-flow investigation of the characteristics of seven unswept, untapered airfoils of aspect ratio 8.0 (open access)

Wing-flow investigation of the characteristics of seven unswept, untapered airfoils of aspect ratio 8.0

Report presenting testing of a series of seven 10-percent-thick unswept and untapered airfoils of aspect ratio 8.0 using the wing-flow method at a range of Mach numbers. The most significant characteristic noted was the occurrence of an unstable pitching moment variation with angle of attack for small angles of attack at Mach numbers of 0.85 to 0.90 for all airfoils with a conventional thickness distribution. Results regarding lift characteristics, moment characteristics, and drag characteristics are provided.
Date: June 13, 1951
Creator: Crane, Harold L. & Adams, James J.
System: The UNT Digital Library
Experimental Rolling of Uranium : Lackawanna No. 3 (open access)

Experimental Rolling of Uranium : Lackawanna No. 3

The following report is one of a series of rolling tests to establish the rolling process for Feed Materials Production Center at Fernold, Ohio. The primary objective of this program is to find a mechanically feasible process for continuous rolling of uranium.
Date: December 13, 1951
Creator: Riches, J. W.
System: The UNT Digital Library
The Determination of Hydrogen in Magnesium, Lithium, and Magnesium Alloys (open access)

The Determination of Hydrogen in Magnesium, Lithium, and Magnesium Alloys

The following report describes the process of the determination of hydrogen in magnesium, lithium, and magnesium alloys, including methods of analyzing magnesium-lithium alloys for hydrogen, and the tin-fusion method used for determining the hydrogen content of pure magnesium that can also be used to analyze pure lithium for hydrogen.
Date: November 13, 1951
Creator: Mallett, Manley William, 1909-; Gerds, A. F. & Griffith, C. B.
System: The UNT Digital Library
Selection of Engineering Materials for Low Thermal Neutron Absorption Properties (open access)

Selection of Engineering Materials for Low Thermal Neutron Absorption Properties

From abstract: "This report outlines a method for selecting materials including alloys for use as a structural member in a neutron flux based on its thermal neutron absorption properties."
Date: September 13, 1951
Creator: Mahlmeister, James Earle; Imhoff, D. H. & Frankel, J. P.
System: The UNT Digital Library
IV.  Production and Heating (open access)

IV. Production and Heating

Calculations are developed which indicate the Pu production is an infinite lattice
Date: February 13, 1951
Creator: Brown, Harold
System: The UNT Digital Library
RF Field Investigations on the 1/10 Scale Mark I Cavity (open access)

RF Field Investigations on the 1/10 Scale Mark I Cavity

A complete investigation was made of the r-f field in the 1/10-scale Materials Testing Accelerator (Mark I) cavity
Date: March 13, 1951
Creator: Dazey, Mitchell; Nielsen, Dale; Robertson, Raymond & Sewell, Duane
System: The UNT Digital Library
Three-Velocity Neutron Diffusion Calculations for an Untamped Oralloy Sphere (open access)

Three-Velocity Neutron Diffusion Calculations for an Untamped Oralloy Sphere

The results of a series of neutron diffusion calculations relating to an untamped Orally sphere are presented in detail in this report. The three-velocity neutron transport theory was taken as the basis for the analytical work preceding the computations. This particular theory, also known as the transport approximation, is defined in LA-1271 and known to be quite accurate for assemblies primarily involving materials of large atomic weight. For a sphere of uniform density and atomic composition the transport theory has another advantage. It can readily be formulated in terms of simultaneous integral equations (in our case three), relatively simple in form, involving the collision densities [formula] and a set of parameter values describing the materials. Nb(r) is , as indicated, a function of the radial distance [formula] and the velocity index g, g - 1, 2, 3. The parameters, fifteen in number for the three-velocity theory, are comprised of the velocities, the inverse mean free paths, and the transfer coefficients.
Date: October 13, 1951
Creator: Carlson, Bengt
System: The UNT Digital Library