Application of blade cooling to gas turbines (open access)

Application of blade cooling to gas turbines

From Summary: "A review of the status of the knowledge on turbine-blade cooling and a description of pertinent NACA investigations are presented. The current limitations in performance of uncooled and cooled engines are briefly discussed. Finally, the knowledge available and investigations to increase the knowledge on heat transfer, cooling-flow, and performance characteristics of cooled turbines are discussed."
Date: May 31, 1950
Creator: Ellerbrock, Herman H., Jr. & Schafer, Louis J., Jr.
Object Type: Report
System: The UNT Digital Library
Effect of Nose Shape and Wing Thickness Ratio on the Drag at Zero Lift of a Missile Having Triangular Wings and Tails (open access)

Effect of Nose Shape and Wing Thickness Ratio on the Drag at Zero Lift of a Missile Having Triangular Wings and Tails

"Free-flight tests have been made to determine the drag at zero lift of several configurations of a missile having triangular wings and tails. Base-pressure measurements were also obtained for some of the configurations. The results show that increasing the wing thickness ratio from 4 to 6 percent increased the wing drag by about 100 percent at M = 1.3 and by about 30 percent at M = 1.8" (p. 1).
Date: May 31, 1950
Creator: Hall, James R. & Sandahl, Carl A.
Object Type: Report
System: The UNT Digital Library
Fission Product Analysis of Urine (open access)

Fission Product Analysis of Urine

A method has been adapted from ion exchange studies for removal of the fission products, Cs-137, Sr-90, and the rare earths for both untreated urine samples and the supernates from the precipitation steps in the TTA procedure for plutonium. Because of the excessive amount of eluant necessary to separate the fission products and the resulting time required to run a separation, a method was developed to remove the Sr-Y, Ce and Pr by chemical means and Cs from the raffinate of this extraction by ion exchange. It should be noted that Cs is easily separated from Pu in the separations plant, and that is presence as a contaminate in the outer areas is not as probable as the other long-lived fission products. This fact has been born out in three years of analyzing contaminated samples from the 200 Area by the H.I. Development Divisions.
Date: May 31, 1950
Creator: Thorburn, R. C.
Object Type: Report
System: The UNT Digital Library
Fission Product Analysis of Urine (open access)

Fission Product Analysis of Urine

The following report describes a chemical procedure to analyze fission products and long-lived rare earths in both untreated urine samples and the supernates from the precipitation steps in the TTA procedure for plutonium.
Date: May 31, 1950
Creator: Thorburn, R. C.
Object Type: Report
System: The UNT Digital Library
Thermal Test Unit (open access)

Thermal Test Unit

Report discussing a performance evaluation of the Thermal Test Unit, a piece of test equipment fabricated to "aid the Hanford Works in experimentally determining heat transfer characteristics for a particular application."
Date: May 31, 1950
Creator: Cohen, A. & Rede, G. R.
Object Type: Report
System: The UNT Digital Library
THREE NEW DELAYED ALPHA EMITTERS OF LOW MASS (open access)

THREE NEW DELAYED ALPHA EMITTERS OF LOW MASS

Two new positron active isotopes, B{sup 8} and Na{sup 20}, have been found to decay to excited states of Be{sup 8} and Ne{sup 20}, which in turn decay 'instantaneously' by alpha emission. Their half-lives are 0.65 {+-} 0.1 sec. and 1/4 sec. respectively. N{sup 12} is also found to have a low energy positron group which leads to an {alpha}-unstable excited state in C{sup 12}. The masses of B{sup 8} and Na{sup 20} are 8.027 and 20.015 respectively. B{sup 8} decays by a 13.7 {+-} 0.3 Mev positron, through the same excited state of Be{sup 8} as does Li{sup 8}. Estimates of the energies of the excited state in C{sup 12} and Ne{sup 20} are made.
Date: May 31, 1950
Creator: Alvarez, Luis W.
Object Type: Report
System: The UNT Digital Library
'Fission' of Medium Weight Elements (open access)

'Fission' of Medium Weight Elements

The fission reaction has been observed with high energy accelerator projectiles for elements as light as tantalum but has not been reported for medium weight elements. The present note presents evidence for the occurrence of reactions which are probably most properly described by the term 'fission' and which seem to occur with very small yield throughout the region where this type of reaction is only slightly exoergic or even endoergic with respect to mass balance. In the course of detailed investigation of the spallation of copper and the variation of the product yields with energy of the bombarding particle the threshold for formation of radioactive Cl{sup 38} (38-minute half-life) from elemental studied. The energetically most economical way in which Cl{sup 38} might be spallation reactions is by emission from the bombarded copper nucleus of nucleons in groups such as alpha-particles instead of single nucleons 0 The energetic requirements for the reaction Cu{sup 63}(p,pn6a)Cl{sup 38}, in which the maximum number of alpha-particles are emitted, include (1) the mass difference between the reactants and the products and (2) the excitation energy which the alpha-particles must have in order to pass over the coulombic barrier, Since the reaction is endoergic with respect to …
Date: May 29, 1950
Creator: Batzel, Roger T. & Seaborg, G. T.
Object Type: Report
System: The UNT Digital Library
Investigation of the Spin and Recovery Characteristics of a 0.057-Scale Model of the Modified Chance Vought XF7U-1 Airplane. TED No. NACA DE 311 (open access)

Investigation of the Spin and Recovery Characteristics of a 0.057-Scale Model of the Modified Chance Vought XF7U-1 Airplane. TED No. NACA DE 311

"An investigation has been conducted in the Langley 20-foot free-spinning tunnel to determine the spin and recovery characteristics of a 0.057-scale model of the modified Chance Vought XF7U-1 airplane. The primary change in the design from that previously tested was a revision of the twin vertical tails. Tests were also made to determine the effect of installation of external wing tanks" (p. 1).
Date: May 29, 1950
Creator: Berman, Theodore & Pumphrey, Norman E.
Object Type: Report
System: The UNT Digital Library
On the Particular Integrals of the Prandtl-Busemann Iteration Equations for the Flow of a Compressible Fluid (open access)

On the Particular Integrals of the Prandtl-Busemann Iteration Equations for the Flow of a Compressible Fluid

"The particular integrals of the second-order and third-order Prandtl-Busemann iteration equations for the flow of a compressible fluid are obtained by means of the method in which the complex conjugate variables are utilized as the independent variables of the analysis. The assumption is made that the Prandtl-Glauert solution of the linearized or first-order iteration equation for the two-dimensional flow of a compressible fluid is known. The forms of the particular integrals, derived for subsonic flow, are readily adapted to supersonic flows with only a change in sign of one of the parameters of the problem" (p. 909).
Date: May 29, 1950
Creator: Kaplan, Carl
Object Type: Report
System: The UNT Digital Library
Recovery of Nitric Acid in the Tributyl Phosphate Process for Uranium Recovery. Part 2. (open access)

Recovery of Nitric Acid in the Tributyl Phosphate Process for Uranium Recovery. Part 2.

Report discussing study on recovery of nitric acid in the uranium recovery process. The behavior of chloride ions and tributyl phophate is noted, and the quality of recycled nitric acid was tested. Stainless steel in the nitric acid recovery system was evaluated for corrosion.
Date: May 29, 1950
Creator: Wagner, R. M. & Groot, C.
Object Type: Report
System: The UNT Digital Library
Texas Attorney General Opinion: V-1064 (open access)

Texas Attorney General Opinion: V-1064

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Price Daniel, regarding a legal question submitted for clarification: Taxation of a whip owned by a Louisiana corporation and listing Corpus Christi, Texas, as its home port.
Date: May 29, 1950
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: V-1063 (open access)

Texas Attorney General Opinion: V-1063

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Price Daniel, regarding a legal question submitted for clarification: Compensation of Chief Probation Officer in Galveston County and related questions.
Date: May 27, 1950
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Fabrication and Properties of Hot-Pressed Molybdenum Disilicide (open access)

Fabrication and Properties of Hot-Pressed Molybdenum Disilicide

Report presenting an investigation of hot-pressed molbdenum disilicide bodies produced by industrial processes at a temperature of 2950 degrees and a pressure of 3000 pounds per square inch. Results regarding the short-time tensile strength, stress-rupture data, compression strength, air-corrosion resistance, hardness, coefficient of linear thermal expansion, thermal conductivity, and density are provided.
Date: May 26, 1950
Creator: Long, Roger A.
Object Type: Report
System: The UNT Digital Library
Flight Investigation of the Aileron Characteristics of the Douglas D-558-I Airplane (BuAero No. 37972) at Mach Numbers Between 0.6 and 0.89 (open access)

Flight Investigation of the Aileron Characteristics of the Douglas D-558-I Airplane (BuAero No. 37972) at Mach Numbers Between 0.6 and 0.89

"Abrupt, rudder-fixed aileron rolls have been made with the Douglas D-558-I airplane (BuAero No. 37972) at Mach numbers between 0.6 and 0.89. Rolls were made at aileron deflections between one-eighth and one-half the maximum available deflection. The results obtained indicate that the aileron effectiveness is independent of Mach number and deflection within the range investigated" (p. 1).
Date: May 26, 1950
Creator: Thompson, Jim Rogers; Roden, William S. & Eggleston, John M.
Object Type: Report
System: The UNT Digital Library
THE OPERATION OF A PULSE COLUMN FOR THE PRODUCTION OF HAFNIUM-FREE ZIRCONIUM (open access)

THE OPERATION OF A PULSE COLUMN FOR THE PRODUCTION OF HAFNIUM-FREE ZIRCONIUM

None
Date: May 26, 1950
Creator: Robinson, J.B. & Tupper, H.T.
Object Type: Report
System: The UNT Digital Library
Survey of Nonmetallic Liquid Coolants for Nuclear-Power Piles (open access)

Survey of Nonmetallic Liquid Coolants for Nuclear-Power Piles

A comprehensive survey of the literature was made in an effort to identify nonmetallic materials of possible usefulness as liquid coolants. Materials having maximum melting points of 1000 deg F and boiling points of l200 deg F were considered, but boiling points above 2200 deg F were preferred. Melting points, boiling points, densities, heat capacities, and thermal conductivities were tabulated. Approximately 190 materials appeared to have melting and boiling temperatures in a suitable range. A paucity of thermal- conductivty and heat-capacity data prevented further estimates of suitability of all but nine of these materials. Of these nine nonmetallics, only sodium hydroxide appeared to offer possibilities when considered according to the NEPA formula. (M.C.G.)
Date: May 26, 1950
Creator: Shaw, H.L. & Boulger, F.W.
Object Type: Report
System: The UNT Digital Library
Texas Attorney General Opinion: V-1062 (open access)

Texas Attorney General Opinion: V-1062

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Price Daniel, regarding a legal question submitted for clarification: Pay of State employee who does reserve military service on his vacation time.
Date: May 26, 1950
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Wing-dropping characteristics of some straight and swept wings at transonic speeds as determined with rocket-powered models (open access)

Wing-dropping characteristics of some straight and swept wings at transonic speeds as determined with rocket-powered models

Report presenting data gathered on a lateral-trim change or wing dropping that involves a rapid change of lateral trim with Mach number, which has occurred on several rocket-powered models used in roll investigations at transonic speeds. The data in this report demonstrates that straight wings with airfoil sections 9 percent thick or greater are susceptible to wing dropping between Mach numbers of 0.9 and 1.0. Results for straight, sweptback, and delta wings are provided.
Date: May 26, 1950
Creator: Stone, David G.
Object Type: Report
System: The UNT Digital Library
Effects of inlet icing on performance of axial-flow turbojet engine in natural icing conditions (open access)

Effects of inlet icing on performance of axial-flow turbojet engine in natural icing conditions

A flight investigation in natural icing conditions was conducted to determine the effect of inlet ice formations on the performance of axial-flow turbojet engines. The results are presented for icing conditions ranging from a liquid-water content of 0.1 to 0.9 gram per cubic meter and water-droplet size from 10 to 27 microns at ambient-air temperature from 13 to 26 degrees F. The data show time histories of jet thrust, air flow, tail-pipe temperature, compressor efficiency, and icing parameters for each icing encounter. The effect of inlet-guide-vane icing was isolated and shown to account for approximately one-half the total reduction in performance caused by inlet icing.
Date: May 25, 1950
Creator: Acker, Loren W. & Kleinknecht, Kenneth S.
Object Type: Report
System: The UNT Digital Library
The Erosion of Graphite by High Temperature Helium Jets (open access)

The Erosion of Graphite by High Temperature Helium Jets

None
Date: May 24, 1950
Creator: Green, L.
Object Type: Report
System: The UNT Digital Library
An improved approximate method for calculating lift distributions due to twist (open access)

An improved approximate method for calculating lift distributions due to twist

Report presenting a method for calculating the lift distribution due to twist which gives a closer approximation than the current Schrenk empirical method and requires about the same amount of computing. The method uses the lifting-line theory and makes use of the lift distribution due to angle of attack and considers the aspect ratio of the wing. Examples are presented for four main types of twist: symmetrical, antisymmetrical, continuous, and discontinuous.
Date: May 24, 1950
Creator: Sivells, James C.
Object Type: Report
System: The UNT Digital Library
An Investigation of a Supersonic Aircraft Configuration Having a Tapered Wing With Circular-Arc Sections and 40 Degree Sweepback: A Pressure-Distribution Study of the Aerodynamic Characteristics of the Wing at Mach Number 1.59 (open access)

An Investigation of a Supersonic Aircraft Configuration Having a Tapered Wing With Circular-Arc Sections and 40 Degree Sweepback: A Pressure-Distribution Study of the Aerodynamic Characteristics of the Wing at Mach Number 1.59

Memorandum presenting a pressure-distribution investigation of a wing of a complete supersonic aircraft configuration as conducted in the 4- by 4-foot supersonic tunnel at Mach number 1.59 based on the mean aerodynamic chord. The experimental life and drag coefficients were less than those predicted by linear theory. Results regarding section pressure characteristics, section characteristics, spanwise characteristics, and overall wing characteristics are provided.
Date: May 23, 1950
Creator: Cooper, Morton & Spearman, M. Leroy
Object Type: Report
System: The UNT Digital Library
Rolling Effectiveness of a Thin Tapered Wing Having Partial-Span Ailerons as Determined by Rocket-Powered Test Vehicles (open access)

Rolling Effectiveness of a Thin Tapered Wing Having Partial-Span Ailerons as Determined by Rocket-Powered Test Vehicles

"The rolling effectiveness of a thin, tapered, and essentially unswept wing having outboard partial-span plain ailerons has been determined by means of rocket-powered test vehicles. The rolling power decreased abruptly in the Mach number range from 0.85 to 0.95 and more gradually at higher speeds. At the maximum Mach number of the tests (1.95), the rolling effectiveness was only 20 percent of that at a Mach number of 0.85" (p. 1).
Date: May 23, 1950
Creator: Sandahl, Carl A. & Strass, H. Kurt
Object Type: Report
System: The UNT Digital Library
Absorption Spectrum of Ferric Sulfate Complex (open access)

Absorption Spectrum of Ferric Sulfate Complex

None
Date: May 22, 1950
Creator: Katzin, L.I. & Gebert, E.
Object Type: Report
System: The UNT Digital Library