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NACA Research Memorandums
42
NACA Technical Notes
30
Atomic Energy Commission Reports
25
United States Geological Survey Reports
9
Hanford Works Reports
7
HW (Series)
6
ORNL (Series)
6
Oak Ridge National Laboratory Reports
6
Trace elements investigations report
4
United States Bureau of Mines Reports
4
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An analysis of an x-ray absorption method for measurement of high gas temperatures
From Introduction: "A theoretical analysis of the factors involved in the measurement of the temperature of gaseous combustion products by the X-ray absorption method is presented herein."
Date:
December 1951
Creator:
Weltmann, Ruth N. & Kuhns, Perry W.
System:
The UNT Digital Library
An analysis of flow in rotating passage of large radial-inlet centrifugal compressor at tip speed of 700 feet per second
Report presenting an analysis of the flow in the rotating passages of a 48-inch diameter radial-inlet centrifugal impeller at a tip speed of 700 feet per second in order to provide more information on the flow conditions within the impeller. Results regarding the impeller and diffuser performance, design flow characteristics, and off-design flow characteristics are provided.
Date:
December 1951
Creator:
Prian, Vasily D. & Michel, Donald J.
System:
The UNT Digital Library
An analytical investigation using aerodynamic limitations of several designs of high stage pressure ratio multistage compressors
From Introduction: "As more quantitative information becomes available, more will be known of the maximum stage total-pressure ratios that can be used while maintaining acceptable efficiences and weight flows. Because quantitative knowledge is limited, the qualitative nature of limiting factors and trends are investigated herein."
Date:
December 1951
Creator:
Voit, Charles H. & Thomson, Arthur R.
System:
The UNT Digital Library
Application of the Von Kármán momentum theorem to turbulent boundary layers
Report presenting a study of the Von Kármán momentum theorum with respect to its application to turbulent boundary layers in a positive pressure gradient. The results indicate that the streamwise derivative of the turbulent longitudinal momentum may be large near the separation and therefore should be considered when the momentum theorum is used for turbulent boundary layers near separation.
Date:
December 1951
Creator:
Bidwell, Jerold M.
System:
The UNT Digital Library
Approximate methods for calculating the flow about nonlifting bodies of revolution at high supersonic airspeeds
Explicit expressions are developed which yield the Mach number and pressure distributions on the surfaces of pointed nonlifting bodies of revolution operating at high supersonic airspeeds and at values of the hypersonic similarity parameter (ratio of free-stream Mach number to slenderness ratio) greater than 1. Very simple explicit expressions are obtained for these distributions in the special case of slender bodies. In the case of cones, the analytic solutions accurately define the entire flow field over a wide range of free-stream Mach numbers and apex angles.
Date:
December 1951
Creator:
Eggers, A. J., Jr. & Savin, Raymond C.
System:
The UNT Digital Library
Ceramic Coatings for Prevention of Carbon Absorption in Four Heat-Resistant Alloys
Note presenting an investigation of three ceramic coatings applied to four heat-resistant alloys that are tested for effectiveness in preventing carbon absorption under strongly carburizing conditions (box carburizing).
Date:
December 1951
Creator:
Pitts, Joseph W. & Moore, Dwight G.
System:
The UNT Digital Library
A Comparison of Predicted and Experimentally Determined Longitudinal Dynamic Responses of a Stabilized Airplane
Report presenting predictions of the dynamic longitudinal stability of an airplane with autopilot and comaprisons with measured flight frequency and transient responses for three airspeeds and various autopilot settings of displacement and rate of displacement feedback. Results regarding the aircraft transfer function, autopilot frequency response, hinge moment, autopilot gearing, and autopilot-aircraft combination are provided.
Date:
December 1951
Creator:
Smaus, Louis H.; Gore, Marvin R. & Waugh, Merle G.
System:
The UNT Digital Library
Concerning the Flow About Ring-Shaped Cowlings Part 6: Further Measurements on Inlet Devices
"The present report presents as a supplement to the fourth report (available as ATI 5045, Air Materiel Command) in the series of investigations concerning the flow about ring-shaped cowlings further wind-tunnel measurements on inlet devices which are to show the influence of the radius of the nose of the cowling on the flow conditions. Moreover, a simple rule for the design of such arrangements, containing a hub in the interior, is suggested" (p. 1).
Date:
December 1951
Creator:
Küchemann, Dietrich & Weber, Johanna
System:
The UNT Digital Library
Correlation of Soil Properties with Geologic Information: Report Number 2, Correlation of Liquid Limit and Mechanical Analysis
Introduction: The general project of correlating soil properties with geologic information and with simple soil index characteristics, one phase of which is described in this report, consists in comparing soil properties with soil types and with their geologic history and environment in order to determine what correlations are possible.
Date:
December 1951
Creator:
Waterways Experiment Station (U.S.)
System:
The UNT Digital Library
Criterions for condensation-free flow in supersonic tunnels
Report presenting the results of an investigation of water-vapor condensation shocks in the air passing through supersonic tunnels. Criterions for condensation-free flow are established by correlating experimental observations with the Volmer theory of nuclei formation. Results regarding the condensation-free criterions, scale effect, physical appearance of condensation shock, and practical considerations for tunnel design are provided.
Date:
December 1951
Creator:
Burgess, Warren C., Jr. & Seashore, Ferris L.
System:
The UNT Digital Library
Critical Combinations of Bending, Shear, and Transverse Compressive Stresses for Buckling of Infinitely Long Flat Plates
"Three-dimensional interaction surfaces are presented for the computation of elastic buckling stresses for an infinitely long flat plate subjected to combinations of bending, shear, and transverse compression in its plane - a loading approximating that occurring in a shear web. Surfaces are presented for two sets of edge conditions: both edges simply supported and lower edge simply supported, upper edge clamped. Present results are in good agreement with data for one-load and two-load limiting cases previously published" (p. 1).
Date:
December 1951
Creator:
Johnson, Aldie E., Jr. & Buchert, Kenneth P.
System:
The UNT Digital Library
Deflections of a Simply Supported Rectangular Sandwich Plate Subjected to Transverse Loads
"The differential equations of the bending of sandwich plates were integrated to obtain the deflections when the four edges of the plate are simply supported and the loading consists of either a uniformly distributed transverse load or a concentrated load applied at the center of the panel. The deflection patterns are shown in diagrams and the maximum deflection of the plate is presented in a number of graphs" (p. 1).
Date:
December 1951
Creator:
Yen, Kuo Tai; Gunturkun, Sadettin & Pohle, Frederick V.
System:
The UNT Digital Library
Determination of Ram-Jet Combustion-Chamber Temperatures by Means of Total-Pressure Surveys
Note presenting a method by which the total temperature of the gases at the combustion-chamber outlet of a ramjet engine may be determined from the loss in total pressure measured across the combustion chamber. Values of total-temperature ratio across the combustion chamber of a 20-inch ram jet were obtained in the altitude wind tunnel over a range of pressure altitudes.
Date:
December 1951
Creator:
Pinkel, I. Irving
System:
The UNT Digital Library
Development of Auxiliary Cyclotron Equipment for Using Tritium as Bombarding Particles in a Cyclotron
"A circulating system for radioactive tritium was constructed, assembled, and tested. The results showed that the pumping speed of the system was too low for use. Therefore, bombardments in the cyclotron with tritium particles would not be made during the course of this project" (p. 1).
Date:
December 1951
Creator:
Kundu, D. N.; Boyle, F. G. & Pool, M. L.
System:
The UNT Digital Library
Effect of Slip on Flow Near a Stagnation Point and in a Boundary Layer
"Theoretical analyses are presented of the effect of slip on the flow of a rarefied gas near a stagnation point and in a boundary layer on a flat plate. The results indicate that the stagnation pressure is increased because of the effect of slip but that there is a negligible effect on the flat-plate skin-friction coefficient in the range of application of the analysis" (p. 1).
Date:
December 1951
Creator:
Lin, T. C. & Schaaf, S. A.
System:
The UNT Digital Library
Effect of various parameters including Mach number on the single-degree-of-freedom flutter of a control surface in potential flow
Report presenting various investigations of single-degree-of-freedom pitching oscillations of a wing in potential flow. It demonstrates by theoretical calculations that single-degree-of-freedom control-surface flutter is possible. The effects of structural damping, aerodynamic balance, axis of rotation, and compressibility are provided.
Date:
December 1951
Creator:
Runyan, Harry L.
System:
The UNT Digital Library
Enrichment of Uranium 236
From abstract: "Neutron-irradiated uranium was electromagnetically separated to provide enrichment of the isotope of mass 236. The final isotopic abundance of U 236 was determined to be 95% in 1800 milligrams of uranium. Useful by-products of the program were 22 grams of 25% U 236 and 1100 grams of 99.7% U 235. These enriched materials have been made available for use on Atomic Energy Commission projects. Possible application of this separation process to recovery of the fuel from the MTR reactor is described."
Date:
December 1951
Creator:
Harmatz, B.; McCurdy, H. C.; Case, F. N. & Livingston, R. S.
System:
The UNT Digital Library
Enrichment of Uranium 236
From abstract: "Neutron-irradiated uranium was electromagnetically separated to provide enrichment of the isotope of mass 236. The final isotopic abundance of U 236 was determined to be 95% in 1800 milligrams of uranium. Useful by-products of the program were 22 grams of 25% U 236 and 1100 grams of 99.7% U 235. These enriched materials have been made available for use on Atomic Energy Commission projects. Possible application of this separation process to recovery of the fuel from the MTR reactor is described."
Date:
December 1951
Creator:
Harmatz, B.; McCurdy, H. C.; Case, F. N. & Livingston, R. S.
System:
The UNT Digital Library
Experimental Investigations of Rolling Performance of Straight and Sweptback Flexible Wings With Various Ailerons
Note presenting two flexible wings, one with 45 degrees sweepback and the other unswept, to determine their performance in roll. Rolling moments due to aileron deflection, damping derivatives in roll, and free-rolling angular velocities due to aileron deflection were obtained at various speeds including, when possible, the aileron reversal speed. The results showed that, when designed for equal stress, the swept wing had generally higher reversal speeds than did the straight wing.
Date:
December 1951
Creator:
Cole, Henry A., Jr. & Ganzer, Victor M.
System:
The UNT Digital Library
A Flight Investigation of the Effect of Center-of-Gravity Location on Gust Loads
Note presenting two jet-propelled airplanes that were flown in rough air to investigate the effects of center-of-gravity location on gust loads. Data were obtained at centers of gravity of 20.9 and 27.5 percent mean aerodynamic chord for incremental load factor up to 1 g. The results indicated approximately a 10-percent reduction in loads for a forward movement of the center-of-gravity location of 6.6 percent mean aerodynamic chord.
Date:
December 1951
Creator:
Funk, Jack & Binckley, Earle T.
System:
The UNT Digital Library
Influence of Wing and Fuselage on the Vertical-Tail Contribution to the Low-Speed Rolling Derivatives of Midwing Airplane Models with 45 Degree Sweptback Surfaces
Note presenting an investigation to determine the influence of the wing and fuselage on the vertical-tail contribution to the low-speed rolling derivatives of midwing airplane models with 45 degree sweptback surfaces. Results regarding the data presentation, characteristics of some basic configurations, interference effects, and tail contributions are provided.
Date:
December 1951
Creator:
Wolhart, Walter D.
System:
The UNT Digital Library
Investigations of Domestic Radioactive Raw Materials, Beryllium, and Other Trace Elements, Monthly Report: November 1951
Monthly report of the U.S. Geological Survey's trace element investigations including an outline of field work, laboratory work, and staff activities that have been completed or are in process.
Date:
1951-12~
Creator:
Geological Survey (U.S.). Trace Elements Office.
System:
The UNT Digital Library
Mechanical and Corrosion Tests of Spot-Welded Aluminum Alloys
Note presenting an investigation to determine the effect of spot-weld quality on the corrosion behavior of panels fabricated from alclad 24S-T3, 24S-T3, R-301-T6 of 0.020-inch thickness. The preparation and examination of each of the specimens is described. Results regarding effect of exposure on weld shear strength, effect of exposure on normal tensile strength of welds, and a metallographic examination of spot welds are provided.
Date:
December 1951
Creator:
Reinhart, Fred M.; Hess, W. F.; Wyant, R. A.; Winsor, F. J. & Nash, R. R.
System:
The UNT Digital Library
Numerical Determination of Indicial Lift of a Two-Dimensional Sinking Airfoil at Subsonic Mach Numbers From Oscillatory Lift Coefficients With Calculations for Mach Number 0.7
Note presenting the reciprocal equations for relating the incompressible circulatory indicial lift to the lift due to harmonic oscillations as modified to include the noncirculatory lift associated with apparent-mass effects. The equations are evaluated numerically for determining the indicial lift and moment on an airfoil experiencing a sudden acquisition of vertical velocity at Mach number 0.7.
Date:
December 1951
Creator:
Mazelsky, Bernard
System:
The UNT Digital Library