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On Neutron Evaporation From Excited Nuclei

Description: At high excitation energies, competition of proton and c-particle emission with neutron emission becomes important. For low excitation, the competition between Y-emission, neutron emission, and fission should be taken into account. To aid in the evaluation of this competition an experiment has been performed to measure the number and energy spectrum of the protons and c-particles emitted in the high energy bombardment of uranium with protons, deuterons, and c-particles.
Date: June 18, 1953
Creator: Adelman, Frank L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On Pairs of Solutions of a Class of Internal Viscous Flow Problems With Body Forces

Description: Note presenting a few examples of two distinct states of flow and heat transfer which were obtained for a given set of conditions if the frictional heating was taken into account. This report discusses these pairs of solutions in greater detail and shows how the solutions are affected by systematic variations of the basic physical parameters.
Date: June 1958
Creator: Ostrach, Simon & Albers, Lynn U.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On Panel Flutter and Divergence of Infinitely Long Unstiffened and Ring-Stiffened Thin-Walled Circular Cylinders

Description: Note presenting a theoretical investigation of the panel flutter and divergence of infinitely long, unstiffened and ring-stiffened thin-walled circular cylinders. Linearized unsteady potential-flow theory is utilized in conjunction with Donnell's cylinder theory to obtain equilibrium equations for panel flutter.
Date: April 1956
Creator: Leonard, Robert W. & Hedgepeth, John M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On Panel Flutter and Divergence of Infinitely Long Unstiffened and Ring-Stiffened Thin-Walled Circular Cylinders

Description: "A preliminary theoretical investigation of the panel flutter and divergence of infinitely long, unstiffened and ring-stiffened thin-walled circular cylinders is described. Linearized unsteady potential-flow theory is utilized in conjunction with Donnell's cylinder theory to obtain equilibrium equations for panel flutter. Where necessary, a simplified version of Flugge's cylinder theory is used to obtain greater accuracy. By applying Nyquist diagram techniques, analytical criteria for the locat… more
Date: January 11, 1956
Creator: Leonard, Robert W. & Hedgepeth, John M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On Possible Similarity Solutions for Three-Dimensional Incompressible Laminar Boundary-Layer Flows Over Developable Surfaces and with Proportional Mainstream Velocity Components

Description: Analysis is presented on the possible similarity solutions of the three-dimensional, laminar, incompressible, boundary-layer equations referred to orthogonal, curvilinear coordinate systems. Requirements of the existence of similarity solutions are obtained for the following: flow over developable surface and flow over non-developable surfaces with proportional mainstream velocity components.
Date: September 1958
Creator: Hansen, Arthur G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On possible similarity solutions for three-dimensional incompressible laminar boundary layers 1: similarity with respect to stationary rectangular coordinates

Description: From Summary: "Solutions of mainstream flow patterns for all possible incompressible laminar-boundary-layer flows having classical similarity with respect to rectangular coordinate systems are derived. These solutions, which apply to a wide range of flows, are summarized in table form."
Date: October 1956
Creator: Hansen, Arthur G. & Herzig, Howard Z.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On possible similarity solutions for three-dimensional incompressible laminar boundary layers 2: similarity with respect to stationary polar coordinates

Description: From Summary: "Solutions of mainstream flow patterns for three-dimensional, laminar, incompressible thin-boundary-layer flows (over flat or slightly curved surfaces) having similarity with respect to stationary polar coordinates in the plane of the surface are derived. The solutions are summarized in a table."
Date: November 1956
Creator: Herzig, Howard Z. & Hansen, Arthur G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On possible similarity solutions for three-dimensional incompressible laminar boundary layers 3: similarity with respect to stationary polar coordinates for small angle variation

Description: Report presenting approximate solutions describing mainstream flows confined to regions of small angle variation over flat surfaces for three-dimensional, laminar, incompressible, thin boundary-layer flows with similar with respect to stationary polar coordinate systems. Results regarding the mainstream, boundary layer, ordinary differential equations, and comparison with experiment are provided.
Date: January 1957
Creator: Herzig, Howard Z. & Hansen, Arthur G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On Reflection of Shock Waves from Boundary Layers

Description: Note presenting measurements of the reflection characteristics of shock waves from a flat surface with a laminar and turbulent boundary layer. The difference in the shock-wave interaction with laminar and turbulent boundary layers, first found in transonic flow, is confirmed and investigated in detail for supersonic flow.
Date: April 1951
Creator: Liepmann, H. W.; Roshko, A. & Dhawan, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On Rotational Conical Flow

Description: Some general properties of isoenergetic rotational conical fields are determined. For such fields, provided the physical parameters of the fluid flow are known on a conical reference surface, it being understood that they satisfy certain imposed conditions, it is shown how to construct the hodographs in the various meridional semiplanes, as the envelope of either the tangents to the hodographs or of the osculatory circles.
Date: February 1952
Creator: Ferrari, Carlo
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On slender-body theory and the area rule at transonic speeds

Description: The basic ideas of the slender-body approximation have been applied to the nonlinear transonic-flow equation for the velocity potential in order to obtain some of the essential features of slender-body theory at transonic speeds. The results of the investigation are presented from a unified point of view which demonstrates the similarity of slender-body solutions in the various Mach number ranges. The transonic area rule and some conditions concerning its validity follow from the analysis.
Date: November 1956
Creator: Harder, Keith C. & Klunker, E. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On slender-body theory at transonic speeds

Description: The basic ideas of the slender-body approximation have been applied to the nonlinear transonic-flow equation for the velocity potential in order to obtain some of the essential features of slender-body theory at transonic speeds. The results of the investigation are presented from a unified point of view which demonstrates the similarity of slender-body solutions in the various Mach number ranges. The transonic area rule and some conditions concerning its validity follow from the analysis. (aut… more
Date: January 18, 1954
Creator: Harder, Keith C. & Klunker, E. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On slender delta wings with leading-edge separation

Description: Report presenting the slender-body approximation of linearized compressible flow as applied to the problem of a delta wing in which flow separation occurs at the leading edges. Leading-edge separation was found to produce an increase in lift over that given by the Jones slender-wing theory and that lift does not linearly increase with angle of attack.
Date: April 1955
Creator: Brown, Clinton E. & Michael, William H., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On Solutions for the Transient Response of Beams

Description: Note presenting Williams type modal solutions of the elementary and Timoshenko beam equations for the transient response of several uniform beams to a general applied load. Example computations are shown for a free-free beam subject to various concentrated loads at its center. Results regarding modal solutions, the need for Timoshenko's theory, and numerical solutions are provided.
Date: June 1958
Creator: Leonard, Robert W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On spectral analysis of runway roughness and loads developed during taxiing

Description: Report presenting the application of the techniques of generalized harmonic analysis to the airplane taxiing problem. Some previous results on runway roughness are reviewed and some results obtained from taxiing tests of a large airplane are given. The use of spectral techniques was found to be a rather concise way of presenting the characteristics of runway roughness.
Date: July 1955
Creator: Houbolt, John C.; Walls, James H. & Smiley, Robert F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On Stability and Turbulence of Fluid Flows

Description: This investigation is divided into two parts, the treatment of the stability problem of fluid flows on the one hand, and that of the turbulent motion on the other. The first part summarizes all previous investigations under a unified point of view, that is, sets up as generally as possible the conditions under which a profile possesses unstable or stable characteristics, and indicates the methods for solution of the stability equation for any arbitrary velocity profile and for calculation of th… more
Date: June 1951
Creator: Heisenberg, Werner
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On Stokes' Stream Function in Compressible Small-Disturbance Theory

Description: Note presenting a study of Stokes' stream function for subsonic or supersonic flow past axisymmetric bodies of small slope. The first-order equation is found to be nonlinear. It can be linearized if one seeks only the formal order of accuracy of the slender-body approximation.
Date: February 1957
Creator: Van Dyke, Milton D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On Subsonic Flow Past a Paraboloid of Revolution

Description: Note presenting the use of the Janzen-Rayleigh method of expansion in powers of the stream Mach number to calculate the velocity potential for steady subsonic flow past a paraboloid of revolution. Only the first two terms of the expansion are calculated.
Date: February 1957
Creator: Kaplan, Carl
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On the Analysis of Linear and Nonlinear Dynamical Systems From Transient-Response Data

Description: Note presenting a general theory of the so-called equations of motion methods for the analysis of linear dynamical systems. When viewed from this general vantage point, all of the linear methods can be extended in a straightforward manner to apply to the analysis of nonlinear systems.
Date: December 1954
Creator: Shinbrot, Marvin
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On the angular distribution of slip lines in polycrystalline aluminum alloy

Description: Report presenting a wide distribution in the angular orientation of slip lines, which is generally observed in various grains of a metal subjected to plastic deformation. Results regarding a comparison of theoretical and experimental results and consequences of the present investigation relative to the slip theory of plasticity are provided.
Date: December 1951
Creator: Hedgepeth, John M.; Batdorf, S. B. & Sanders, J. Lyell, Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On the Application of Mathieu Functions in the Theory of Subsonic Compressible Flow Past Oscillating Airfoils

Description: Note presenting an account of explicit solutions in terms of Mathieu functions of the problem of two-dimensional subsonic compressible flow past oscillating airfoils. The results are applied to the calculation of three-dimensional corrections for the two-dimensional theory and the effect of the incorporation of the three-dimensional effects on the Mathieu function solution of the two-dimensional problem is shown.
Date: May 1951
Creator: Reissner, Eric
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On the Application of Transonic Similarity Rules

Description: Note presenting a discussion of the transonic aerodynamic characteristics of wings of finite span from the point of view of a unified small perturbation theory for subsonic, transonic, and supersonic flows about thin wings. The relation between the two methods of analysis of transonic flow is examined, the similarity rules and known solutions of transonic flow theory are reviewed, and the asymptotic behavior of the lift, drag, and pitching-moment characteristics of wings of large and small aspe… more
Date: June 1952
Creator: Spreiter, John R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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