39 Matching Results

Search Results

Results: 1 - 24 next
open access

Preliminary investigation of effect on performance of dividing conical-spike nose inlets into halves at Mach numbers 1.5 to 2.0

Description: Inserting a splitter plate in the subsonic diffuser caused a pressure-recovery loss of about 1 percent for an inlet with a long nearly constant-area throat section. The loss was due to the increased surface area. Another inlet, which had a comparatively rapid area increase immediately after the throat, experienced pressure-recovery losses of 5 and 6 percent at Mach numbers of 1.8 and 2.0, respectively, and about 1 percent at Mach 1.5.
Date: December 19, 1955
Creator: Allen, John L.
Partner: UNT Libraries Government Documents Department
open access

Investigation of Porous Gas-Heated Leading-Edge Section for Icing Protection of a Delta Wing

Description: "A tip section of a delta wing having an NACA 0004-65 airfoil section and a 600 leading-edge sweepback was equipped with a porous leading-edge section through which hot gas was bled for anti-icing. Heating rates for anti-icing were determined for a wide range of icing conditions. The effects of gas flow through the porous leading-edge section on airfoil pressure distribution and drag in dry air were investigated" (p. 1).
Date: January 19, 1955
Creator: Bowden, Dean T.
Partner: UNT Libraries Government Documents Department
open access

Heat Transfer Characteristics of Graphite Plates with Hydrogen Coolant

Description: "This note presents the results of a parametric study of heat-generating graphite plates with hydrogen coolant flowing through constant area passages. The heat generation within the graphite was assumed to have a distribution that allowed the centerline temperature of the plates to remain constant at 5000 F. The parametric variables were the mass flow rate per unit area, plate thickness, plate length, and passage hydraulic diameter. The machine calculations were coded by Ivan Cherry, T-1."
Date: October 19, 1955
Creator: Bussard, R. W. & Durham, F. P.
Partner: UNT Libraries Government Documents Department
open access

Analysis of Limitations Imposed on One-Spool Turbojet-Engine Designs by Turbines Having Downstream Stators at 0, 2.0, and 2.8 Flight Mach Numbers

Description: Memorandum presenting an aerodynamic design-point analysis of one-spool turbojet engines with one-stage turbines with one and with two rows of downstream stator blades. The object of the analysis was to evaluate the design characteristics of the turbines in comparison with conventional one- and two-stage turbines, to determine the extent to which exit whirl can be increased before causing weight-flow capacity to decrease, and to determine the effect of downstream stators on engine design limita… more
Date: January 19, 1955
Creator: Cavicchi, Richard H. & Constantine, Anita B.
Partner: UNT Libraries Government Documents Department
open access

Observation of Antiprotons

Description: One of the striking features of Dirac's theory of the electron was the appearance of solutions to his equations which required the existence of an antiparticle, later identified as the positron.
Date: October 19, 1955
Creator: Chamberlain, Owen; Segre, Emilio; Wiegand, Clyde & Ypsilantis, Thomas
Partner: UNT Libraries Government Documents Department
open access

Aircraft Reactor Test Hazards Summary Report

Description: The successful completion of a program of experiments, including the Aircraft Reactor Experiment (ARE), has demonstrated the high probability of producing militarily useful aircraft nuclear power plants employing reflector-moderated circulating-fuel reactors. Consequently, and accelerated program culminating in operation of the Aircraft Reactor Test (ART) is under way. In order to adhere to the compressed schedule of the accelerated program, it is essential that the Atomic Energy Commission app… more
Date: January 19, 1955
Creator: Cottrell, W. B.; Ergen, W. K.; Fraas, A. P.; McQuilkin, F. R. & Meem, J. L.
Partner: UNT Libraries Government Documents Department
open access

Performance and Component Frontal Areas of a Hypothetical Two-Spool Turbojet Engine for Three Modes of Operation

Description: Engine performance is better for constant outer-spool mechanical-speed operation than for constant inner-spool mechanical-speed operation over most of the flight range considered. Combustor and afterburner frontal areas are about the same for the two modes. Engine performance for a mode characterized by a constant outer-spool equivalent speed over part of the flight range and a constant outer-spool mechanical speed over the rest of the flight range is better that that for constant outer-spool m… more
Date: December 19, 1955
Creator: Dugan, James F., Jr.
Partner: UNT Libraries Government Documents Department
open access

The Theory of Isotope Separation by Countercurrent Chemical Exchange

Description: The theory of isotope separation by countercurrent chemical exchange is worked out in detail using the continuous transfer concept. A comparison is made with discrete stagewise processes such as gaseous diffusion and with various general concepts of solvent extraction. The effects of a cell structure in the flow system is also worked out. An elementary design procedure is included both for the no-loss case and the case where the losses are small. In addition, a method of estimating stage length… more
Date: January 19, 1955
Creator: E., DeMarcus W.C. & Von Halle
Partner: UNT Libraries Government Documents Department
open access

Turbojet engine investigation of effect of thermal shock induced by external water-spray cooling on turbine blades of five high-temperature alloys

Description: Report presenting an investigation of the thermal-shock effect of water-spray impingement upon turbine rotor blades subjected to rated engine operating conditions using external water-spray cooling. Turbine-blade cooling water was turned on and off in cycles which employed either sudden or gradual injection of cooling water. Results regarding blades modified and unmodified for rotating injection are provided.
Date: December 19, 1955
Creator: Freche, John C. & Hickel, Robert O.
Partner: UNT Libraries Government Documents Department
open access

APPR critical experiment program meeting

Description: This report addresses the APPR critical experiment program meeting.
Date: May 19, 1955
Creator: Gallagher, J G
Partner: UNT Libraries Government Documents Department
open access

Interim report - Production Test MR-105-12 crossheader purge with chromic acid

Description: The primary purpose of this test was to demonstrate that the inside of a rear-cross-header, its nozzles and pigtails could be decontaminated by recirculating for 30 minutes, a 60{degrees} C, O.3 pH chromic acid solution. Secondary purposes were, (1) to determine the magnitude of radiation increase in piping and acid equipment external to the reactor encountered during the test and (2) to obtain information as to the kind and amount of contaminants removed by the acid solution.
Date: September 19, 1955
Creator: Hardin, A. K.
Partner: UNT Libraries Government Documents Department
open access

A Study of the Correlation Between Flight and Wind-Tunnel Buffeting Loads

Description: Report presenting a comparison of the buffet loads measured on wind-tunnel models with loads measured in flight, which indicate that a simple strain-gage measurement can be used in wind tunnel testing that can be used to predict the wing buffet loads on the airplane. The technique appears to be usable for both unswept and swept configurations.
Date: July 19, 1955
Creator: Huston, Wilber B.; Rainey, A. Gerald & Baker, Thomas F.
Partner: UNT Libraries Government Documents Department
open access

A Study of the Fabrication Failures for Zirconium and Zircaloy-2 Process Tubes and of the Annealing and Cold Rolling of Zircaloy-2

Description: A study of the fabrication failures for zirconium and zircaloy-2 process tubes was made. In the tube reducing operation, a non-uniform reduction in area for the cross section was found to be a major cause of failure. In annealing studies, a cycle of 2 hours at 820 deg C in vacuum followed by furnace cooling produced the greatest ductility of extruded zircaloy-2 for the annealing treatments studied. The ductility of cold worked and annealed zircaloy-2 was found to be superior to that of extruded… more
Date: May 19, 1955
Creator: Johnson, Dale E.
Partner: UNT Libraries Government Documents Department
open access

Performance of YJ73-GE-3 turbojet engine in altitude test chamber

Description: Report presenting the steady-state performance of the YJ73-GE-3 turbojet engine in an altitude test chamber for a range of exhaust-nozzle areas, simulated altitudes, and Mach numbers. A method of performance calculation based on engine pumping characteristics is provided. Results regarding performance maps, pumping characteristics and performance prediction, thrust correlation, effect of inlet temperature on performance, calculated performance from pumping characteristics, and altitude-ignition… more
Date: January 19, 1955
Creator: Kaufman, Harold R. & Dobson, Wilbur F.
Partner: UNT Libraries Government Documents Department
open access

Free-spinning-tunnel investigation of a 1/20-scale model of the Douglas A4D-1 airplane: TED No. NACA DE 389

Description: Report presenting an investigation of the spin and recovery characteristics of a 1/20-scale dynamic model of the Douglas A4D-1 attack airplane in the 20-foot free-spinning tunnel. Erect spins and recoveries were investigated with the model in the clean condition and the loading condition, which includes a center external store with and without two external wing fuel tanks installed. Results regarding several conditions, including erect spins, no external stores, horizontal-tail incidence, 4 deg… more
Date: January 19, 1955
Creator: Klinar, Walter J.; Scher, Stanley H. & Healy, Frederick M.
Partner: UNT Libraries Government Documents Department
open access

Effect of fuselage fences on the angle-of-attack supersonic performance of a top-inlet-fuselage configuration

Description: Report presenting an investigation of the effect of longitudinal body fences on the performance of a top-inlet-fuselage combination in the 8- by 6-foot supersonic wind tunnel. The investigation was conducted at a range of Mach numbers, angles of attack, and a range of inlet mass-flow ratios. The thrust-minus-drag of the top-inlet configuration with fences was higher than the bottom-inlet configuration without fences over most of the range, with the reverse being true at all lift coefficients at… more
Date: January 19, 1955
Creator: Kremzier, Emil J. & Campbell, Robert C.
Partner: UNT Libraries Government Documents Department
open access

Effects of Combining Auxiliary Bleed With Ejector Pumping on the Power Requirements and Test-Section Flow of an 8-Inch by 8-Inch Slotted Tunnel

Description: Report discussing an investigation to determine the effects of combining auxiliary bleed with ejector pumping on the power requirements and test-section flow of an 8-inch by 8-inch slotted tunnel. Two ejector configurations were used and tests were performed at Mach number range of 0.9 to 1.3. Information about the region of supersonic-flow deceleration, diffuser-inlet Mach numbers, total-power requirements, and which ejector characteristics were preferred is provided .
Date: July 19, 1955
Creator: Little, B. H., Jr. & Cubbage, James M., Jr.
Partner: UNT Libraries Government Documents Department
open access

Hydrogen Production in the Calcium and Magnesium-Nitric Acid Reactions

Description: For greater understanding of possible explosion hazards knowledge is needed of the volume of hydrogen evolved in the calcium and magnesium-nitric acid reactions. Measurements of evolved hydrogen are presented in this project.
Date: August 19, 1955
Creator: Myers, M. N.
Partner: UNT Libraries Government Documents Department
open access

Hydrogen Production in the Calcium and Magnesium-Nitric Acid Reactions (Deleted Version)

Description: For greater understanding of possible explosion hazards, data are needed of the volume of H/ evolved in the Ca and Mg reactions with nitric acid. Nearly five liters of H/sub 2/ per mole of Ca are produced when 16M nitric acid reacts with Ca metal. The hydrogen evolved slowly increases with decreasing nitric acid to below 4M nitric acid, when a rapid increase occurs. The Mg--nitric acid reaction produces only one liter of H/sub 2/ per mole of Mg with 2M nitric acid, and the volume of H/sub 2/ de… more
Date: August 19, 1955
Creator: Myers, M. N.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen