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Operating Characteristics of the Lauterbach and Dautrebande Aerosol Generators

Description: From Abstract: "The air flow through the jet, the effect of a pre-humidifier on the water vapor content of the jet air, the cooling effect of the jet air on the generator solution, and the amount of water vapor carried away by the jet air were also determined and the results are discussed."
Date: February 1963
Creator: Mercer, T. T.; Tillery, M. I. & Flores, M. A.
Partner: UNT Libraries Government Documents Department

SNAP 7D: stronium-90 fueled thermoelectric generator power source, thirty-watt U.S. Navy Floating Weather Station, final report

Description: The objectives of the SNAP-7D program were to design, manufacture, test and deliver a thirty-watt electric generating system for a modified U.S. Navy NOMAD-class weather buoy to be stationed in the Gulf of Mexico. The sixty-watt Strontium-90 thermoelectric generator, the relay panel, the batteries, and the installation of the system in a boat-type buoy are described. In addition to delivering the power supply, many tests were required for the SNAP-7D system to demonstrate its conformance to the contract statement of work.
Date: March 15, 1963
Partner: UNT Libraries Government Documents Department

Snap 7B: Stronium-90 Fueled Thermoelectric Generator Power Source, Thirty- Watt U.S. Coast Guard Automatic Light Station. Final Report

Description: The objectives of the SNAP 7B program were to design, manufacture, test and deliver a thirty-watt electric generating system for a U. S. Coast Guard Automatic Light Station. This report describes the sixty-watt, strontium-90 thermoelectric generator, the converter, the batteries, and the installation of the generator into the container. The electrical tests of the generator and of the system, the shock and vibration tests, and the tests at the environmental temperature extremes are discussed.
Date: June 1963
Partner: UNT Libraries Government Documents Department

Strontium 90 Power Project: Final Summary Report

Description: From summary: The primary purpose of this project is to determine the feasibility of converting reactor waste Strontium-90 into a safe and useful source of electrical energy. Secondary purpose is physical and environmental testing of the power conversion device or thermoelectric couples. This required actual fabrication of a 100-thermal-watt strontium titanate fuel element
Date: March 1960
Partner: UNT Libraries Government Documents Department

Investigation to determine effects of rectangular vortex generators on the static pressure drop through a 90 degrees circular elbow

Description: Report presenting an investigation of a constant-area, circular 90 degree elbow of mean radius of curvature equal to its diameter with several arrangements of simple, nontwisted, rectangular vortex generators. The inlet flow had a boundary layer of about one-tenth the duct diameter. Results regarding an elbow with no vortex generators and an elbow with vortex generators are provided.
Date: September 14, 1953
Creator: Valentine, E. Floyd & Copp, Martin R.
Partner: UNT Libraries Government Documents Department

High-Frequency Pulse Generator

Description: Introduction: "The purpose of this work was to develop a high-frequency pulse generator that could be used in conducting research on high-rate trigger pairs and scaler circuits. The need for an instrument of this type arose because there was no parallel commercial instrument having this type arose because there was no parallel commercial instrument having a pulse recurrence frequency over approximately 200,000 pulses per second."
Date: July 3, 1947
Creator: Ohmart, Philip E.
Partner: UNT Libraries Government Documents Department

A limited investigation of the effect of three vortex-generator configuration on the effectiveness of a plain flap on an unswept wing

Description: Report presenting limited flight tests of a fighter airplane in order to determine the effect of three vortex-generator configurations on the effectiveness of a plain flap. The vortex generator configurations were found to only provide a small advantage over the use of flaps alone. Results regarding boundary-layer thickness, lift curves, normal-force coefficient at stall, glide angle, and flow over the flap are provided.
Date: September 1955
Creator: Morris, Garland J. & Lina, Lindsay J.
Partner: UNT Libraries Government Documents Department

The sparking voltage of spark plugs

Description: This report has been prepared in order to collect and correlate into convenient and useful form the available data on this subject. The importance of the subject lies in the fact that it forms the common meeting ground for studies of the performance of spark generators and spark plugs on the one hand and of the internal combustion engines on the other hand. While much of the data presented was obtained from various earlier publications, numerous places were found where necessary data were lacking, and these have been provided by experiments in gasoline engines at the Bureau of Standards.
Date: 1925
Creator: Silsbee, F. B.
Partner: UNT Libraries Government Documents Department

Effects of diffuser and center-body length on performance of annular diffusers with constant-diameter outer walls and with vortex-generator flow controls

Description: Report presenting data for five diffusers tested with and without vortex-generator controls in order to determine the performance improvements attainable through the use of boundary-layer controls. Results regarding inlet conditions, axial inlet flow, and whirling inlet flow are provided.
Date: September 14, 1954
Creator: Wood, Charles C. & Higginbotham, James T.
Partner: UNT Libraries Government Documents Department

Preliminary investigation of the effects of rectangular vortex generators on the performance of a short 1.9:1 straight-wall annular diffuser

Description: Report presenting a preliminary investigation in a duct system with fully developed pipe flow to determine the effectiveness of vortex generators in improving the performance of a 21-inch-diameter straight-outer-wall annual diffuser with an overall equivalent conical expansion angle of 15 degrees and a and 1.9:1 area ratio. The vortex generators used were rectangular noncambered airfoils that varied in chord, span, angle of attack, number, and location. Results regarding a diffuser with no vortex generators, a diffuser with vortex generators on inner body, and a comparison of the diffuser performance with and without vortex generators are provided.
Date: October 10, 1951
Creator: Wood, Charles C.
Partner: UNT Libraries Government Documents Department

An Empirical Comparison of Random Number Generators: Period, Structure, Correlation, Density, and Efficiency

Description: Random number generators (RNGs) are widely used in conducting Monte Carlo simulation studies, which are important in the field of statistics for comparing power, mean differences, or distribution shapes between statistical approaches. Statistical results, however, may differ when different random number generators are used. Often older methods have been blindly used with no understanding of their limitations. Many random functions supplied with computers today have been found to be comparatively unsatisfactory. In this study, five multiplicative linear congruential generators (MLCGs) were chosen which are provided in the following statistical packages: RANDU (IBM), RNUN (IMSL), RANUNI (SAS), UNIFORM(SPSS), and RANDOM (BMDP). Using a personal computer (PC), an empirical investigation was performed using five criteria: period length before repeating random numbers, distribution shape, correlation between adjacent numbers, density of distributions and normal approach of random number generator (RNG) in a normal function. All RNG FORTRAN programs were rewritten into Pascal which is more efficient language for the PC. Sets of random numbers were generated using different starting values. A good RNG should have the following properties: a long enough period; a well-structured pattern in distribution; independence between random number sequences; random and uniform distribution; and a good normal approach in the normal distribution. Findings in this study suggested that the above five criteria need to be examined when conducting a simulation study with large enough sample sizes and various starting values because the RNG selected can affect the statistical results. Furthermore, a study for purposes of indicating reproducibility and validity should indicate the source of the RNG, the type of RNG used, evaluation results of the RNG, and any pertinent information related to the computer used in the study. Recommendations for future research are suggested in the area of other RNGs and methods not used in this study, such as additive, combined, ...
Date: August 1995
Creator: Bang, Jung Woong
Partner: UNT Libraries

SNAP Programs Quarterly Progress Report, Task 8--Stontium-90 Fuled Thermoelectric Generator Development: Number 1, November 1, 1960-January 31, 1961

Description: From summary: The SNAP 7 program is being conducted for the purpose of developing four radioisotope-fueled thermo-electric power generation systems. An important phase of this program is the processing of Strontium-90 into heat sources for these systems. The current effort involves the design and engineering analysis of two of the four thermo-electric generators.
Date: June 1961
Partner: UNT Libraries Government Documents Department

SNAP Programs Quarterly Progress Report, Task 8--Stontium-90 Fuled Thermoelectric Generator Development: Number 5, November 1, 1961-January 31, 1962

Description: From introduction and summary: The SNAP 7 program is being conducted by the Martin Company for the purpose of developing four radioisotope-fueled thermo-electric power generation systems. The current program in its entirety covers: design, fabrication, test and delivery of four-radioisotope-fueled thermo-electric generator systems are to be designed to meet the rigorous environmental requirements of field use by the U.S. Coast Guard and the U.S. Navy.
Date: 1962
Partner: UNT Libraries Government Documents Department

SNAP Programs Quarterly Progress Report, Task 8--Stontium-90 Fuled Thermoelectric Generator Development: Number 6, February 1, 1962-April 30, 1962

Description: From introduction and summary: The prime effort on this contract has been directed toward: Manufacture, assembly and test of the 60-watt thermo-electric generators, procurement of SNAP-7D system components, installation and checkout of the Strontium-90 isotope process equipment.
Date: 1962
Partner: UNT Libraries Government Documents Department

SNAP Programs Quarterly Progress Report, Task 8--Stontium-90 Fuled Thermoelectric Generator Development: Number 7, May 1, 1962-July 31, 1962

Description: From introduction and summary: The effort in this area (Task 8 portion of contract) has been confined to operating the reliability model. There have been fluctuations in output power that can be attributed to variations in the operating parameters, plus an increase in the internal resistance.
Date: 1962
Creator: McDonald, W. A.
Partner: UNT Libraries Government Documents Department

A preliminary flight investigation of the effects of vortex generators on separation due to shock

Description: Investigation of an airplane in flight to determine the effectiveness of vortex generators in preventing separation due to compressibility shock at full-scale Reynolds numbers. All of the arrangements of vortex generators tested delayed separation to higher Mach numbers or lift coefficients. More experimentation will be needed to determine the optimum arrangement of vortex generators.
Date: November 30, 1950
Creator: Lina, Lindsay J. & Reed, Wilmer H., III
Partner: UNT Libraries Government Documents Department

An Investigation of the Effects of a Vortex-Generator Configuration on the Aerodynamic Characteristics of a 1/4-Scale Model of the X-1 Airplane (10-Percent-Thick Wing)

Description: From Summary: "An investigation of a vortex-generator configuration on the wings of a l/4-scale model of the X-1 airplane having a 10-percent-thick wing was conducted in the Langley 16-foot transonic tunnel. The effect of the vortex generators was determined by comparing the model aerodynamic characteristics, wing-pressure distributions, and wing-wake patterns for model configurations with and without vortex generators on the wings. Results are presented from tests at 0.1 increments in Mach number from about 0.69 to 0.99, at Reynolds numbers of about 4.1 x 10(exp 6) to 4.7 x 10(exp 6), and through an angle-of-attack range up to 1.5 deg at lower speeds and up to 5 deg at the highest speed."
Date: December 23, 1952
Creator: Runckel, Jack F. & Henderson, James H.
Partner: UNT Libraries Government Documents Department

Experimental investigation of the effects of vortex generators on the maximum lift of a 6-percent-thick symmetrical circular-arc airfoil section

Description: Report discussing testing in the low-turbulence tunnel to determine the effectiveness of several configurations of vortex generators in increasing maximum lift of a 6-percent-thick symmetrical circular-arc airfoil section. None of the configurations tested were found to greatly increase the lift. Some of the configurations tested included a single row of vortex generators, two rows of generators, larger vortex generators, and sweeping forward the front row of generators.
Date: October 6, 1952
Creator: Bursnall, William J.
Partner: UNT Libraries Government Documents Department

Sustaining knowledge in the neutron generator community and benchmarking study.

Description: In 2004, the Responsive Neutron Generator Product Deployment department embarked upon a partnership with the Systems Engineering and Analysis knowledge management (KM) team to develop knowledge management systems for the neutron generator (NG) community. This partnership continues today. The most recent challenge was to improve the current KM system (KMS) development approach by identifying a process that will allow staff members to capture knowledge as they learn it. This 'as-you-go' approach will lead to a sustainable KM process for the NG community. This paper presents a historical overview of NG KMSs, as well as research conducted to move toward sustainable KM.
Date: March 1, 2008
Creator: Barrentine, Tameka C.; Kennedy, Bryan C.; Saba, Anthony W.; Turgeon, Jennifer L.; Schneider, Julia Teresa; Stubblefield, William Anthony et al.
Partner: UNT Libraries Government Documents Department