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Office of Scientific & Technical Information Technical Reports
268
Congressional Research Service Reports
113
Texas Laws and Resolutions Archive
89
Texas Patents
51
Technical Report Archive and Image Library
40
Government Accountability Office Reports
39
Texas Attorney General Opinions
37
National Advisory Committee for Aeronautics Collection
24
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Performance characteristics of aircraft cooling ejectors having short cylindrical shrouds
The factors affecting the performance of ejector suitable for aircraft cooling are investigated theoretically and experimentally. The investigation covers a range of shroud-to-nozzle diameter ratios from 1.1 to 1.6, of shroud lengths from 0.2 to 2.28 nozzle diameters, of secondary-to-primary weight-flow ratios from 0 to 0.12, and of ambient-to-nozzle pressure ratios from 0.7 to 0.06. The results of a simplified theoretical analysis based on each type of flow are in good agreement with those experimentally obtained.
Date:
May 22, 1951
Creator:
Kochendorfer, Fred D. & Rousso, Morris D.
Object Type:
Report
System:
The UNT Digital Library
Preliminary Investigation of Helmholtz Resonators for Damping Pressure Fluctuations in 3.6-Inch Ram Jet at Mach Number 1.90
Memorandum presenting an investigation conducted at Mach number 1.90 to determine if Helmholtz resonators can be used in a typical ramjet configuration to damp pressure pulsations associated with shock oscillations. Only one of the two resonators was found to effectively damp pressure pulsations that occurred when the ram jet was operating in the vicinity of its peak pressure recovery. Neither was found to effectively damp pressure pulsations over the entire range of ramjet operating conditions.
Date:
May 22, 1951
Creator:
Fox, Jerome L.
Object Type:
Report
System:
The UNT Digital Library
A Critical Review of the Literature on Pressure Drop in Noncircular Ducts and Annuli
This report presents "Results of a critical literature review on pressure drop due to isothermal turbulent flow in noncircular geometries" (introduction).
Date:
May 22, 1952
Creator:
Claiborne, H. C.
Object Type:
Report
System:
The UNT Digital Library
Effects of Some Primary Variables of Rectangular Vortex Generators on the Static-Pressure Rise Through a Short Diffuser
Memorandum presenting an investigation of a 2:1 area ratio conical diffuser of length equal to the inlet diameter with separate variation of several basic parameters for simple nontwisted counterrotating rectangular vortex generators over a considerable range of inlet-boundary-layer thickness. The maximum values of static-pressure rise were determined for angle of attack, spacing, aspect ratio, and span-to-inlet boundary-layer thickness. Results for the diffuser with no vortex generators, effects of selectable vortex-generator variables, effect of inlet-boundary-layer displacement thickness, and use of the maximum indicated vortex-generator design values are provided.
Date:
May 22, 1952
Creator:
Valentine, E. Floyd & Carroll, Raymond B.
Object Type:
Report
System:
The UNT Digital Library
MTA Target Equations
In solving the two-group, two medium equations for neutron diffusion in a finite one-dimensional multiplying system, the equations in each medium can be solved, and the boundary conditions used to determine the coefficients. This direct attack involves eight simultaneous linear equations. The opportunities for error are numerous, and, frequently, a great deal of accuracy is lost by subtractions; hence, it is felt that an alternative method of solution, in which numerical errors would be less likely to occur, would be desirable.
Date:
May 22, 1952
Creator:
Kramer, H. P. & Adelman, F.
Object Type:
Report
System:
The UNT Digital Library
Some Wind-Tunnel Results of an Investigation of the Flutter of Sweptback- and Triangular-Wing Models at Mach Number 1.3
Memorandum presenting flutter tests of untapered, low-aspect-ratio, sweptback-wing models and of triangular-wing models of solid magnesium, aluminum, and steel construction in an intermittent supersonic wind tunnel at Mach number 1.3. Flutter data are presented for 31 sweptback wing models and 24 triangular-wing models. The flutter boundaries are indicated on plots of streamwise thickness ratio and aspect ratio.
Date:
May 22, 1952
Creator:
Tuovila, W. J.
Object Type:
Report
System:
The UNT Digital Library
Calculation of Stagewise Contacting Systems
From abstract: General expressions relating product stream compositions to the operating conditions of countercurrent stagewise extraction columns are derived by an inductive method, and the conversion of the general equations to ones involving the particular case of constant extraction factor is demonstrated. For comparison, the derivation of simple column equations by the use of finite difference equations is included.
Date:
May 22, 1953
Creator:
Bloom, J. L. & Auer, P. L.
Object Type:
Report
System:
The UNT Digital Library
Decontamination of Portable Instruments
The decontamination of portable instruments by the Calibration Unit has presented a problem for some time. Most of the contamination is in the 100 to 500 c/m or 500 to 2000 d/m range. Higher levels of contamination can usually be reduced to these levels, but further cleaning proves quite difficult
Date:
May 22, 1953
Creator:
Unruh, C. M.
Object Type:
Report
System:
The UNT Digital Library
Effect of fuels on combustion efficiency of 5-inch ram-jet-type combustor
Report presenting combustion-efficiency data for a 5-inch ramjet-type combustor using a simple V-gutter flame holder. Data for homogeneous fuel-air mixtures of 14 pure fuels and 3 fuel blends cover a range of inlet static pressures and velocities.
Date:
May 22, 1953
Creator:
Reynolds, Thaine W.
Object Type:
Report
System:
The UNT Digital Library
Photographic investigation of combustion in a two-dimensional transparent rocket engine
Motion pictures at camera speeds up to 3000 frames per second were taken of the combustion of liquid oxygen and gasoline in a 100-pound thrust rocket engine. The effect of seven methods of propellant injection on the uniformity of combustion was investigated. The flame front was generally found to extend to the injector faces and all the injection systems showed considerable nonuniformity of combustion. Pressure vibration records indicated combustion vibrations that corresponded to resonant-chamber frequencies.
Date:
May 22, 1953
Creator:
Bellman, Donald R.; Humphrey, Jack C. & Male, Theodore
Object Type:
Report
System:
The UNT Digital Library
Reactivity of UO{sub 3} produced at HAPO
None
Date:
May 22, 1953
Creator:
Clagett, F.
Object Type:
Report
System:
The UNT Digital Library
Subsonic static longitudinal stability and control characteristics of a wing-body combination having a pointed wing of aspect ratio 2 with constant-percent-chord trailing-edge elevons
Report presenting an investigation to determine the static longitudinal stability and control characteristics of a tailless wing-body combination with a pointed wing of aspect ratio 2 and trailing-edge elevons. The effectiveness of inset tabs in reducing the elevon hinge moment was also determined. Results regarding the lift, drag, pitching moment, elevon hinge moment, tab hinge moment, elevon load, and center of pressure of elevon load are provided.
Date:
May 22, 1953
Creator:
Smith, Donald W. & Reed, Verlin D.
Object Type:
Report
System:
The UNT Digital Library
Texas Attorney General Opinion: MS-40
Letter opinion 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, John Ben Shepperd, regarding a legal question submitted for clarification: Validity of House Simple Resolution No. 289, authorizing the expenditure of the contingent funds to purchase a framed copy of the panel picture of the House membership for each member.
Date:
May 22, 1953
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Effect of Inlet-Guide-Vane Angle on Blade Vibration and Rotating Stall of 13-Stage Axial-Flow Compressor in Turbojet Engine
Report presenting a blade-vibration and rotating-stall survey on a modified version of a production turbojet engine with a 13-stage axial-flow compressor with a design pressure ratio of 7 and an air flow of 120 pounds per second. This testing was carried out due to the problems rotating stall can cause with both experimental and production axial-flow compressors. Results regarding the rotating-stall patterns, rotor-blade vibrations, radial and axial strength of rotating stall, and maximum rotating-stall speed are provided.
Date:
May 22, 1956
Creator:
Calvert, Howard F.; Medeiros, Arthur A. & Johnson, Donald F.
Object Type:
Report
System:
The UNT Digital Library
Effect of Inlet-Guide-Vane Angle on Performance Characteristics of a 13-Stage Axial-Flow Compressor in a Turbojet Engine
Report presenting the effect of adjusting compressor inlet-guide-vane angle on overall compressor performance, stage performance, engine thrust, and specific fuel consumption in a 7000-pound-thrust turbojet engine. Data was obtained at several angles and demonstrated that increasing the guide-vane angle decreased the weight flow at the higher compressor speeds. It had no effect on stage performance other than at the first stage, where it reduced maximum flow, pressure, and temperature coefficients.
Date:
May 22, 1956
Creator:
Medeiros, Arthur A. & Calvert, Howard F.
Object Type:
Report
System:
The UNT Digital Library
Gas-turbine-engine performance when heat from liquid-cooled turbines is rejected ahead of, within, or behind main compressor
Report discussing methods, advantages, and disadvantages of locating rotating heat exchangers ahead of, within, and behind the main engine compressor. Heat rejection should occur at the compressor discharge for best engine performance. Results regarding turbojet-engine performance, turboprop-engine performance, and a comparison of engine performance with liquid- and air-cooling are provided.
Date:
May 22, 1956
Creator:
Esgar, Jack B. & Slone, Henry O.
Object Type:
Report
System:
The UNT Digital Library
Hazardous Materials - Redox Plant
The Redox process uses or produces only a very few materials that are hazardous for reasons other than radioactivity. The conditions under which these materials become hazardous were carefully taken into consideration in the development of the process and design of the equipment. A considerable about of information on the hazardous properties of the process materials was obtained so that the pertinent material could be incorporated into the process specifications. Providing the equipment is operating properly and the process is being carried out within specification limits, no hazardous conditions can be created by the process. The purpose of this report is to assemble in a single, readily available document all of the information on the normal concentration limits and safe handling procedures needed to adequately control the use and storage of these materials. This report should be helpful in preparing safety bulletins and provide guidance in case of unusual incidents, malfunctioning of equipment, or contemplated changes in either the process or equipment. It is important to remember that a maximum allowable concentration (MAC) is only a limit on the concentration of a toxic material which cannot be exceeded in the air to which workers are constantly exposed to every working …
Date:
May 22, 1956
Creator:
Underwood, J. W.
Object Type:
Report
System:
The UNT Digital Library
Investigation of two-stage counterrotating compressor I : design and over-all performance of transonic first compressor stage
Report presenting a highly loaded transonic rotor which was designed, built, and tested as part of a two-stage counterrotating-compressor research program. The design conditions were chosen to explore the upper limits of loading and Mach number for the transonic unit. The complete rotor design procedure is presented as well as the recorded stall traces and techniques for obtaining the data.
Date:
May 22, 1956
Creator:
Wilcox, Ward W. & Wright, Linwood C.
Object Type:
Report
System:
The UNT Digital Library
Measurement of Large, High-Frequency, Short-Pulse Currents Using a Radial Shunt
Abstract: "The measurement of large, high-frequency, short-pulse currents--ordinarily complicated by inductance, stray magnetic fields, and magnetic forces that tend to disassemble the measuring device--is simplified and made with an average error of 2-1/2% by the use of a specially developed noninductive radial shunt in conjuntion with an oscilloscope. The skin-effect correction is derived theoretically and the accuracy of the method is demonstrated."
Date:
May 22, 1956
Creator:
McFarlane, H. Bruce
Object Type:
Report
System:
The UNT Digital Library
A Simplified Method for Approximating the Transient Motion in Angles of Attack and Sideslip During a Constant Rolling Maneuver
"The transient motion in angles of attack and sideslip during a constant rolling maneuver has been analyzed. Simplified expressions are presented for the determination of the pertinent modes of motion as well as the modal coefficient corresponding to each mode. Calculations made with and without the derivatives for side force due to sideslip and lift-curve slope indicate that although these derivatives increase the total damping of the system they do not markedly affect the transient motion" (p. 131).
Date:
May 22, 1956
Creator:
Sternfield, Leonard
Object Type:
Report
System:
The UNT Digital Library
Temperatures in a J47-25 turbojet-engine turbine section during steady-state and transient operation in an altitude test stand
Report presenting a J47-25 engine instrumented with thermocouples and operated under steady-state and transient-conditions in an altitude test stand to determine the operating temperatures at altitude in the turbine section of a turbojet engine. Results regarding the temperature effects and transient operation are provided.
Date:
May 22, 1956
Creator:
Morse, C. R. & Johnston, J. R.
Object Type:
Report
System:
The UNT Digital Library
Weighted Least-Square Polynomial Approximation to a Continuous Function of a Single Variable
Report describing a method of fitting "a weighted least square polynomial of order n to a set of m observation points" in order "to satisfy the need for a general curve fitting scheme" (p. 1).
Date:
May 22, 1956
Creator:
Von Holdt, Richard E. & Brousseau, Robert J.
Object Type:
Report
System:
The UNT Digital Library
Chemical Processing Department monthly report, April 1957
Two new production records were set during April, for processed U and Pu production. 0.9 tons sheared NRX fuel were dissolved in Redox. Discrepancies in Pu yield are being studied. Alternate methods of recovering Np are being evaluated. The Purex prototype facility will be converted to the anion exchange process. Alternate designs for a Purex miniature service dissolver were reviewed. The Purex HA column will be replaced.
Date:
May 22, 1957
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
CHEMICAL TECHNOLOGY DIVISION, UNIT OPERATIONS SECTION MONTHLY PROGRESS REPORT FOR DECEMBER 1956
None
Date:
May 22, 1957
Creator:
Bresee, J.C.; Long, J.T.; Nurmi, E.O. & Watson, C.D.
Object Type:
Report
System:
The UNT Digital Library