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274 Matching Results
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The Distribution of Thermal Neutrons in a Slug with Thick End Caps
The distribution of thermal neutrons in a W slug having a one centimeter aluminum end cap has been calculated on the basis of simple diffusion theory. It is found that the average neutron density, and therefore the power output, at the end of the slug is about 34% higher than the density far from the end cap. This result agrees well with the recent Argonne pile experiments (CP-1729).
Date:
August 3, 1944
Creator:
Wilkins, J. Ernest, Jr., 1923-2011
System:
The UNT Digital Library
Temperature and Heat Flow in a Graphite Electrode
In making various experimental heat studies a power producing metal slug is simulated by a slug with a graphite rod electrode of 3/8" diameter inserted lengthwise through it. There is a helium filled annular space between the graphite and the inner surface of the slug cylinder. Radiant heat passes from the electrode to the metal; with proper adjustment of the electrode current the slug in the steady state will therefor "produce" the same amount of energy from its exterior surface as it would under operating conditions. The question arises, however, as to how uniform the electrode temperature is along its length. And also, in some cases one end of the electrode is embedded in the slug metal; it is then desirable to know how much heat flows by conduction from the electrode into the slug.
Date:
August 3, 1944
Creator:
Schlegel, R.
System:
The UNT Digital Library
Altitude-Wind-Tunnel Investigation of a 4000-Pound-Thrust Axial-Flow Turbojet Engine, Part 1, Performance and Windmilling Drag Characteristics
From Summary: "The results of altitude-wind-tunnel tests conducted to determine the performance of an axial-flow-type 4000-pound-thrust turbojet engine for a range of pressure altitudes from 5000 to 40,000 feet and ram pressure ratios from 1.02 to 1.86 are presented and the experimental and analytical methods employed are discussed. By means of suitable generalizing factors applied to the measured performance data, curves were obtained from which the engine performance at any altitude for a given ram pressure ratio can be estimated. The data presented include the windmilling drag characteristics of the turbojet engine for the ranges of altitudes and ram pressure ratios covered by the performance data."
Date:
August 3, 1948
Creator:
Fleming, William A.
System:
The UNT Digital Library
Preliminary Results of an Altitude-Wind-Tunnel Investigation of an Axial-Flow Gas Turbine-Propeller Engine 2 - Windmilling Characteristics
Wind tunnel investigations were performed to determine the performance properties of an axial-flow gas turbine-propeller engine II. Windmilling characteristics were determined for a range of altitudes from 5000 to 35,000 feet, true airspeeds from 100 to 273 miles per hour, and propeller blade angles from 4 degrees to 46 degrees.
Date:
August 3, 1948
Creator:
Conrad, E. W. & Durham, J. D.
System:
The UNT Digital Library
Problems of Full-Scale Testing of Nuclear Power Plants for Aircraft
None
Date:
August 3, 1948
Creator:
Rothrock, Addison
System:
The UNT Digital Library
Performance of J33-A-21 and J33-A-23 Turbojet-Engine Compressors with Water Injection
"As part of the performance investigation of compressors for the J33 turbojet engine, the A-21 model and the A-23 model with a 17- and a 34-blade impeller were operated with water injection at their respective design equivalent speeds of 11,500 and 11,750 rpm. Inlet conditions of pressure of 14 inches of mercury absolute and of ambient temperature correspond to those of the investigation of these models without water injection. The water-air ratio by weight ranged from 0.05 to 0.06. By the use of water injection, the peak pressure ratio of the A-21 compressor and the A-23 compressor with a 34-blade impeller increased approximately 0.38, whereas that of the A-23 compressor with a 17-blade impeller increased only 0.14" (p. 1).
Date:
August 3, 1949
Creator:
Beede, William L. & Withee, Joseph R., Jr.
System:
The UNT Digital Library
Processing of Runs X-9-07-9 and X-9-07-27
None
Date:
August 3, 1949
Creator:
Work, J.B.
System:
The UNT Digital Library
Altitude-wind-tunnel investigation of operational characteristics of J47 turbojet engine
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.
System:
The UNT Digital Library
Laboratory Survey of Deoxidants for Uranium Chips
Summary: "Six different types of solutions of various concentrations were used to deoxidize uranium chips on a laboratory scale. None of the solutions tested appears to be more desirable than 50% nitric acid for deoxidizing uranium chip on a production scale."
Date:
August 3, 1950
Creator:
Kattner, W. T.
System:
The UNT Digital Library
SEMI-FINAL REPORT ON THE CORROSION RESISTANCE OF SEVERAL ALLOYS IN AN HF- H$sub 2$O ATMOSPHERE AT HIGH TEMPERATURES
None
Date:
August 3, 1950
Creator:
Ritchie, C.F. & Teter, E.K.
System:
The UNT Digital Library
STOPPING POWER AND ENERGY FOR ION PAIR PRODUCTION FOR 340 MEVPROTONS
The relative stopping powers for 300 Mev protons of H, Li, Be, C, Al, Fe, Cu, Ag, Sn, W, Pb, and U have been measured. The results are shown in Table I. The energy spent per ion-pair production in the gases H{sub 2}, He, N{sub 2}, O{sub 2}, and A at 340 Mev proton energy has also been measured. The results are shown in Table II.
Date:
August 3, 1950
Creator:
Bakker, C.J. & Segre, E.
System:
The UNT Digital Library
100 Areas technical activities report - physics, July 1951
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 equipment. Studies of neutron fluxes from exponential piles, and criticality studies are also discussed.
Date:
August 3, 1951
Creator:
unknown
System:
The UNT Digital Library
Removal of ruptured slug from tube No. 4086-B
None
Date:
August 3, 1951
Creator:
Koop, W.N.
System:
The UNT Digital Library
Additional Experiments on Stored Energy in BNL Reactor Graphite
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 energy, and then again after the energy was released. In this way, he obtained time against temperature curves for both normal and irradiated graphite from the same sample. (These curves are graphed for each run in Figs. 1 thru 5.) b) The vycor tubing used in the original experiment was not used by Kosiba. Five runs of this experiment were selected, Runs 4P, 13, 36, and 40 at furnace temperatures of 200°C, and Run 45 at a furnace temperature of 400°C.
Date:
August 3, 1953
Creator:
Mulhern, T.
System:
The UNT Digital Library
[Imperial Sugar Company Actual and Projected Operations: 1953]
Monthly report documenting Imperial Sugar operational expenses for the year, broken down by actual sales and production, with estimated operational numbers for the remainder of the year.
Date:
August 3, 1953
Creator:
Imperial Sugar Company
System:
The Portal to Texas History
Effect of unequal air-flow distribution from twin inlet ducts on performance of an axial-flow turbojet engine
Report presenting an investigation in the NACA altitude test chamber to determine the effect of inlet-air-flow distortion on the performance of an axial-flow turbojet engine with simulated twin inlet ducts. Results regarding the pressure and temperature profiles, component performance, overall engine performance, and operational comments are provided.
Date:
August 3, 1954
Creator:
Walker, Curtis L.; Sivo, Joseph N. & Jansen, Emmert T.
System:
The UNT Digital Library
Investigation of a high-temperature single-stage turbine suitable for air cooling and turbine stator adjustment 2: performance of vortex turbine at various stator settings
Report presenting a consideration of a mode of engine operation that requires operational flexibility of the turbine, which requires that the turbine stator and exhaust nozzle area are adjusted to maintain a fixed compressor operating point. Results regarding turbine performance and comparison of predicted and experimental turbine performance are provided.
Date:
August 3, 1954
Creator:
Heaton, Thomas R.; Holeski, Donald E. & Forrette, Robert E.
System:
The UNT Digital Library
A method for increasing the effectiveness of stabilizing surfaces at high supersonic Mach numbers
Report presenting the use of wedge-shaped airfoil sections to obtain large increases in lift-curve slope at low angles of attack at high supersonic Mach numbers. The use of such sections on the tail surfaces operating at low angles of attack on airplanes or missiles traveling at these speeds can greatly decrease the stabilizing-surface area required.
Date:
August 3, 1954
Creator:
McLellan, Charles H.
System:
The UNT Digital Library
The Roll Cladding of Uranium With Aluminum
Report discussing a study regarding rolling as a technique for making uranium fuel elements that are flat-plate and aluminum-clad.
Date:
August 3, 1954
Creator:
Saller, Henry A.; Paprocki, Stan J. & Delaney, J. F.
System:
The UNT Digital Library
Theoretical Investigation Based on Experimental Frequency-Response Measurements of an Automatic Altitude Control in Combination With Supersonic Missile Configuration
Report presenting an analysis of an investigation of a simple altitude control based on static-pressure and rate-of-climb sensing is combined with a supersonic missile as a servomechanism to yield the closed-loop behavior of the entire system. The control system was found to function successfully at a low-altitude missile of the boost-guide type and would likely perform well at high altitude.
Date:
August 3, 1954
Creator:
Seaberg, Ernest C.; Geller, Edward S. & Willoughby, William W.
System:
The UNT Digital Library
Drag Near Zero Lift of a 1/7-Scale Model of the Convair B-58 External Store as Measured in Free Flight Between Mach Numbers of 0.8 and 2.45
"The zero-lift drag of a 1/7-scale model of the Convair B-58 external store was obtained at mach numbers between 0.8 and 2.45 at corresponding Reynolds numbers per foot of 3.5 x 10 to the 6th power and 15.3 X 10 to the 6th power. The experimental drag data are compared with calculated values at both subsonic and supersonic speeds and show good agreement. In addition to the drag data, some static stability derivatives and damping factors were also obtained and are presented with the predicted values of these derivatives for completeness and for comparison" (p. 1).
Date:
August 3, 1955
Creator:
Hopko, Russell N.
System:
The UNT Digital Library
Effects of river flow manipulation at Priest Rapids
The operation of a Priest Rapids dam is stated to necessitate river flow manipulation varying from 25,000 cfs to 120,000 cfs in the winter months of a critical water year. The low flow may persist for periods of six hours daily, and the expected daily average low flow is 61,000 cfs. The possible effects of this on reactor operation and waste disposal to the Columbia River which are of the interest to the Radiological Sciences Department were reviewed by J.F. Honstead, R.E. Rostenbach, and R.F. Foster. These include radiation hazards in reactor area water treatment plants, reactor area drinking water contamination; increased river temperature; chromium pollution problems; effects on downstream river usage, and effects on aquatic life.
Date:
August 3, 1955
Creator:
Synder, J. H.
System:
The UNT Digital Library
Error in airspeed measurement due to the static-pressure field ahead of an airplane at transonic speeds
The magnitude and variation of the static-pressure error for various distances ahead of sharp-nose bodies and open-nose air inlets and for a distance of 1 chord ahead of the wing tip of a swept wing are defined by a combination of experiment and theory. The mechanism of the error is discussed in some detail to show the contributing factors that make up the error. The information presented provides a useful means for choosing a proper location for measurement of static pressure for most purposes.
Date:
August 3, 1955
Creator:
O'Bryan, Thomas C.; Danforth, Edward C. B. & Johnston, J. Ford
System:
The UNT Digital Library
[Imperial Sugar Company Sugar Stock and Sales Report: August 3, 1955]
Sugar Stock and Sales report for Imperial Sugar Company including a list of sugar sales for the date showing the amounts and estimated balance separated by location, raw sugar, and refined sugar sales.
Date:
August 3, 1955
Creator:
Imperial Sugar Company
System:
The Portal to Texas History