National Advisory Committee for Aeronautics (NACA) - 775 Matching Results

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Analysis of the Liquid-metal Turbojet Cycle for Propulsion of Nuclear Powered Aircraft

Description: Report presenting an analysis of the nuclear powered liquid-metal turbojet cycle for a wide range of engine operating conditions at a range of flight Mach numbers and altitudes. The method of analysis and working charts are presented to facilitate investigations beyond the scope of this report.
Date: November 19, 1951
Creator: Rom, F. E. & Wachtl, W. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An Analytic Determination of the Flow Behind a Symmetrical Curved Shock in a Uniform Stream

Description: From Introduction: "The present report is concerned with a closer investigation of the validity of this method and includes a more complete formulation, as well as the computation procedure, of the series expansion. As stated in reference 1, the flow thus determined depends only on the Mach number when the detached distance is adopted as the length scale. General formulas and the procedure of calculation are given in this report for such purposes."
Date: October 1951
Creator: Lin, C. C. & Shen, S. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An Analytical and Experimental Investigation of the Skin Friction of the Turbulent Boundary Layer on a Flat Plate at Supersonic Speeds

Description: Report presenting a review of turbulent-boundary-layer analyses and experimental data for average skin-friction coefficients on a flat plate in high-speed flow. New solutions are presented which show the effect of using a continuous velocity gradient and the effect of the extent of the laminar sublayer on the average skin-friction coefficient.
Date: February 1951
Creator: Rubesin, Morris W.; Maydew, Randall C. & Varga, Steven A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analytical determination of coupled bending-torsion vibrations of cantilever beams by means of station functions

Description: From Summary: "A method based on the concept of Station Functions is presented for calculating the modes and the frequencies of nonuniform cantilever beams vibrating in torsion, bending, and coupled bending-torsion motion. The method combines some of the advantages of the Rayleigh-Ritz and Stodola methods, in that a continuous loading function for the beam is used, with the advantages of the influence-coefficient method, in that the continuous loading function is obtained in terms of the displa… more
Date: 1951
Creator: Mendelson, Alexander & Gendler, Selwyn
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analytical Evaluation of Aerodynamic Characteristics of Turbines With Nontwisted Rotor Blades

Description: From Introduction: "The purpose the present report is to investigate the aerodynamic characteristics of nontwisted-rotor-blade turbines and to evaluate the characteristics of this type of design by comparison with the characteristics of free-vortex designs."
Date: May 1951
Creator: Slivka, William R. & Silvern, David H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analytical investigation of flow through high-speed mixed-flow turbine

Description: From Introduction: "Good experimental correlation of the analytical results was obtained for the compressor even though isentropic flow and axial symmetry were assumed (reference 1). In order to determine the flow through the turbine being investigated, however, it was necessary to extend the method of reference 1 to include the flow downstream of the rooter since the large blade taper and hub-shroud curvature caused downstream conditions which affected the flow inside the rotor."
Date: October 3, 1951
Creator: Stewart, Warner L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analytical Investigation of Fully Developed Laminar Flow in Tubes With Heat Transfer With Fluid Properties Variable Along the Radius

Description: "In the analytical investigation reported herein, which was conducted in the NACA Lewis laboratory, both velocity and temperature distribution are obtained for fully developed laminar flow in tubes of gases and of liquid metals with variable fluid properties" (p. 1).
Date: July 1951
Creator: Deissler, Robert G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analytical Investigation of Ram-Jet-Engine Performance in Flight Mach Number Range From 3 to 7

Description: "An analytical investigation was made of the performance of isolated ram-jet engines in the flight Mach number range from 3 to 7 for two types of diffuser, a high-efficiency diffuser, and a normal-shock diffuser. The fuel was assumed to be a hydrocarbon similar to gasoline. The conclusions reached are: (1) a design altitude of about 100,000 feet is desirable for a high-efficiency high Mach number ram jet on the basis of engine construction and performance; and (2) although greater thrust could … more
Date: October 17, 1951
Creator: Evans, Philip J., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An analytical investigation using aerodynamic limitations of several designs of high stage pressure ratio multistage compressors

Description: 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.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analytical method for determining performance of turbojet-engine tail-pipe heat exchangers

Description: From Introduction: "The NACA Lewis laboratory has undertaken a program of analytical study to evaluate the effect on turbojet-engine performance of extracting energy from several points in the cycle. The program included an investigation of the effects of air bleed from the compressor outlet, hot gas bleed from the turbine inlet, hot gas bleed from the turbine outlet, and shaft power extraction (references 1 to 4). "
Date: September 1951
Creator: Behun, Michael & Chandler, Harrison C., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Apparatus for obtaining a supersonic flow of very short duration and some drag measurements obtained with its use

Description: From Introduction: "The auxiliary apparatus described in this paper was constructed to meet this need and has been developed to a point where satisfactory measurements of relative drag can be obtained. In this paper, the apparatus is described and some comparisons are made between the results obtained with this apparatus and the measurements of free-fall, rocket, and supersonic-tunnel techniques."
Date: July 23, 1951
Creator: Yeates, John E., Jr.; Bailey, F. J., Jr. & Voglewede, T. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Applicability of the hypersonic similarity rule to pressure distributions which include the effects of rotation for bodies of revolution at zero angle of attack

Description: The analysis of Technical Note 2250, 1950, is extended to include the effects of flow rotation. It is found that the theoretical pressure distributions over drive cylinders can be related by the hypersonic similarity rule with sufficient accuracy for most engineering purposes. The error introduced into pressure distributions and drag effective cylinders by ignoring the rotation term in the characteristic equations is investigated.
Date: June 1951
Creator: Rossow, Vernon J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Application of a channel design method to high-solidity cascades and tests of an impulse cascade with 90 degrees of turning

Description: From introduction: "A technique for application of the channel design methods of reference 11 to the design of high-solidity cascades with prescribed velocity distributions as a function of arc length along the blade-element profiles is presented herein."
Date: November 30, 1951
Creator: Stanitz, John D. & Sheldrake, Leonard J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Application of Response Function to Calculation of Flutter Characteristics of a Wing Carrying Concentrated Masses

Description: Note presenting concepts involved in the harmonic-response-function method, such as the direct or conjugate characteristic modes, by application of the method to the calculation of the change in flutter characteristics of a wing due to adding concentrated masses.
Date: November 1951
Creator: Serbin, H. & Costilow, E. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Application of the Von Kármán momentum theorem to turbulent boundary layers

Description: 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.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Application of Theodorsen's propeller theory to the calculation of the performance of dual-rotating propellers

Description: Report presenting the use of Theodorsen's propeller theory to calculate the performance of a dual-rotating propeller with nonideal load distributions. Results regarding the propeller characteristics were made for several blade-angle settings and flight Mach numbers.
Date: March 15, 1951
Creator: Gilman, Jean, Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Application of Variational Methods to Transonic Flows With Shock Waves

Description: Note presenting a modification of certain variational methods for the approximate solution of subsonic and transonic flows to compensate for the fact that those methods fail as soon as shock waves occur. By applying a variational principle to the regions of flow behind shock waves and Bateman's original principle to the other regions in the fluid, shock equations can be directly obtained.
Date: November 1951
Creator: Wang, Chi-Teh & Chou, Pei-Chi
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Application of X-Ray Absorption to Measurement of Small Air-Density Gradients

Description: Report presenting an analysis of two x-ray absorption methods for determining small air-density gradients. One method uses a Geiger-Mueller counter for detection and the other uses photographic film for detection. Both of the methods are found to have some advantages and disadvantages.
Date: July 1951
Creator: Weltmann, Ruth N.; Fairweather, Steven & Papke, Daryl
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Approximate Calculation of Turbulent Boundary-Layer Development in Compressible Flow

Description: Note presenting numerical solutions of quantities appearing in the Karman momentum equation for the development of a turbulent boundary layer in plane and in radial compressible flows along thermally insulted surfaces in tabular form for a rnage of Mach numbers from 0.100 to 10. Through use of the tables, approximate calculation of boundary-layer growth is reduced to routine arithmetic computation.
Date: April 1951
Creator: Tucker, Maurice
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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