Access
Resource Type
Serial/Series Title
NACA Research Memorandums
422
NACA Technical Notes
401
Atomic Energy Commission Reports
369
United States Department of Energy Grand Junction Office Reports
170
United States Geological Survey Reports
139
NACA Technical Memorandums
136
GJBX
129
NACA Wartime Reports
107
Argonne National Laboratory Reports
102
Trace elements investigations report
68
182 More
Country
States
Decade
Month
Language
2,351 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
2,351
next
Potez 37R2 Military Airplane: A Two-Place Long-Distance Observation Monoplane
Circular presenting a description of the Potez 37R2 military airplane, which is a two-place long-distance observation monoplane. Details of the design, construction, components, characteristics, drawings, and photographs are provided.
Date:
September 1931
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Automated Approach to Quantitative Error Analysis in Neutron Transport Calculations
A method is described how a quantitative measure for the robustness of a given transport theory code for coarse network calculations can be obtained. A code, that performs this task automatically and at only nominal cost, is described and has been implemented for slab geometry. This code generates also user oriented benchmark problems which exhibit the analytic behavior at interfaces.
Date:
September 1976
Creator:
Bareiss, Erwin H. & Derstine, Keith L.
Object Type:
Report
System:
The UNT Digital Library
Examination of the SCEPTRE and CSMP Programs for Solving the Point-Kinetics Equations with Feedback
Two modeling programs, SCEPTRE and CSMP, are used to solve the point-kinetics equations - - seven coupled nonlinear differential equations - - with a linear-feedback function. The constants used are appropriate for EBR-II; therefore the computational accuracy may be tested against the experimental rod drops. Run-time, versatility, programming ease, and accuracy are criteria used to evaluate the two programs. SCEPTRE is found to be more efficient in run time and CSMP more versatile. The ease of programming is about the same for both programs. The accuracy is nearly equivalent if the optimum integration routines are used.
Date:
September 1976
Creator:
Walkowski, P. D. & Peterson, B. R. (Bruce R.)
Object Type:
Report
System:
The UNT Digital Library
A Signal Flow Model for Sequential Logic Built from Combinational Logic Elements and its Implementation in Prolog
A signal flow model is described that uses memory devices from combinational logic. The implementation of this model in Prolog is also presented.
Date:
September 1984
Creator:
Gabriel, John R. & Roberts, Philip R.
Object Type:
Report
System:
The UNT Digital Library
Physics Division Annual Review for 1 April 1984 - 31 March 1985
Report of the activities of the physics division at Argonne including the successful completion of Argonne Tandem-Linac Accelerator System.
Date:
September 1985
Creator:
Argonne National Laboratory. Physics Division.
Object Type:
Report
System:
The UNT Digital Library
Mixing, Chemical Reaction and Flow Field Development in Ducted Rockets
Calculations have been made of the three-dimensional mixing, chemical reaction, and flow field development in a typical ducted rocket configuration. The governing partial differential equations are numerically solved by an iterative finite-difference solution procedure. The physical models include the k approx. epsilon turbulence model, one-step reaction, and mixing controlled chemical reaction rate. Radiation is neglected. The mean flow structure, fuel dispersal patterns, and temperature field are presented in detail for a base configuration with 0.058 m (2 in.) dome height, 45/sup 0/ side arm inclination, and with gaseous ethylene injected from the dome plate at an eccentric location. In addition, the influences of the geometrical parameters such as dome height, inclination of the side arms, and location of the fuel injector are studied.
Date:
September 1984
Creator:
Vanka, S. P.; Craig, R. R. & Stull, F. D.
Object Type:
Report
System:
The UNT Digital Library
Accuracy of the Finite Analytic Method for Scalar Transport Calculations
The accuracy of the finite analytic method of discretizing fluid flow equations is assessed through calculations of multidimensional scalar transport. The transport of a scalar function in a uniform velocity flow field inclined with the finite-difference grid lines is calculated for a range of grid Peclet numbers and flow skewness. The finite analytic method is observed to be superior to the approach of constructing finite-difference analogs from locally one-dimensional resolution of the flow vector. However, the finite analytic method also produces appreciable errors locally in regions of steep variations, under conditions of large grid Peclet numbers, and skewness of the streamlines.
Date:
September 1984
Creator:
Vanka, S. P.
Object Type:
Report
System:
The UNT Digital Library
Flow-Induced Vibration of the SSME LOX Posts
Cracking of liquid-oxygen (LOX) posts was observed in several evaluation tests. The design modification consists of attaching impingement shields to LOX posts in the upstream row. This has improved the vibration/fatigue problem of LOX posts. However, that modification results in an increased pressure drop that ultimately affects the lifetime of other components. This report presents a preliminary assessment of the LOX post vibration problem including a review of relevant parameters, flow induced vibration mechanisms, scoping calculation and experiment, and a work plan for an integrated theoretical/experimental study.
Date:
September 1984
Creator:
Chen, Shoei-Sheng & Jendrzejczyk, J. A.
Object Type:
Report
System:
The UNT Digital Library
Physics Division Annual Review 1 April 1985 - March 1986
Report of various activities in Argonne National Laboratory Physics Division including medium-energy physics research, research at ATLAS, theoretical nuclear physics, superconducting LINAC development, and accelerator operations.
Date:
September 1986
Creator:
Gemmell, Donald S.
Object Type:
Report
System:
The UNT Digital Library
Extraction and Recovery of Plutonium and Americium from Nitric Acid Waste Solutions by the TRUEX Process : Continuing Development Studies
This report summarizes the work done to date on the application of the TRUEX solvent extraction process for removing and separately recovering plutonium and americium from a nitric acid waste solution containing these elements, uranium, and a complement of inert metal ions. This simulated waste stream is typical of a raffinate from a tributyl phosphate (TBP)-based solvent extraction process for removing uranium and plutonium from dissolved plutonium-containing metallurgical scrap. The TRUEX process solvent in these experiments was a solution of TBP and octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) dissolved in carbon tetrachloride. A flowsheet was designed on the basis of measured batch distribution ratios to reduce the TRU content of the solidified raffinate to less than or equal to 10 nCi/g and was tested in a countercurrent experiment performed in a 14-stage Argonne-model centrifugal contractor. The process solvent was recycled without cleanup. An unexpectedly high evaporative loss of CCl4 resulted in concentration of the active extractant, CMPO, to nearly 0.30M in the solvent. Results are consistent with this higher CMPO concentration. The raffinate contained only 2 nCi/g of TRU, but the higher CMPO concentration resulted in reduced effectiveness in the stripping of americium from the solvent. Conditions can be easily adjusted to give …
Date:
September 1985
Creator:
Leonard, R. A.; Vandegrift, G. F.; Kalina, D. G.; Fischer, D. F.; Bane, R. W.; Burris, L. et al.
Object Type:
Report
System:
The UNT Digital Library
General Theory for Dynamic Instability of the SSME LOX Posts
A general theory of fluid-elastic instability for a tube array in crossflow is presented for application to the space shuttle main engine liquid oxygen (SSME LOX) posts. Various techniques to obtain the motion-dependent fluid-force coefficients are discussed and the general instability characteristics are summarized. The theory is also used to evaluate the results of other mathematical models for crossflow-induced instability.
Date:
September 1985
Creator:
Chen, Shoei-Sheng
Object Type:
Report
System:
The UNT Digital Library
Fluid Excitation Forces Acting on a Tube Array
Fluid forces are important in the assessment of vibration of the Space Shuttle Main Engine liquid oxygen posts. This report summarizes the available data on fluid excitation forces acting on tube arrays in turbulent crossflow, and test results for an array of tubes subject to turbulent flow. The fluctuating drag and lift forces are measured as a function of Reynolds number, incoming flow conditions, and tube location in an array.
Date:
September 1985
Creator:
Chen, Shoei-Sheng & Jendrzejczyk, J. A.
Object Type:
Report
System:
The UNT Digital Library
The Henderson "Hendy" 302 Cabin Airplane (British): A Two-Seat Low-Wing Cantilever Monoplane
Circular presenting a description of the Hendy 302, which is a two-seat, low-wing cantilever monoplane with a hinged cabin top. A description of the design, flying qualities, and photographs are provided.
Date:
September 1930
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Breguet Military Airplane, Type 33: A Two-Place Long-Distance Sesquiplane for Observation and Bombing
Circular presenting a description of the Breguet military airplane, Type 33, which is a two-place long-distance sesquiplane made for observation and bombing. Details of the components, bomb dropping, flying qualities, design, flying qualities and performances, drawings, and photographs are provided.
Date:
September 1931
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The Airspeed "Oxford" Training Airplane (British): A Two-Engine Cantilever Monoplane
Circular describing the Airspeed A.S. 10 "Oxford", which is a twin-engine trainer with a variety of equipment, including propellers, landing gear, and other components.Details of the wings, fuselage, the inside, characteristics, performance, drawings, and photographs are provided.
Date:
September 1937
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Travel Air Commercial Airplane - Type 5000
The 5000 is a semicantilever monoplane, closed cabin type, with pilot about in line with the leading edge of the wing and room for 4 passengers behind him. It is equipped with a Wright Whirlwind engine. A description of the visibility, propeller, power plant, pilot's cockpit, passenger cabin, landing gear, struts, wings, fuselage, empennage, general, characteristics, photographs, and drawings are provided.
Date:
September 1927
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The Latécoère 501 Commercial Seaplane (French): A Three-Engine Metal Sesquiplane
Circular presenting a description of the Latécoère 501. A more detailed description of the general characteristics, power plant, wings, planing fins, hull, tail surfaces, and flying characteristics are provided.
Date:
September 1932
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Visual Studies of Cylinder Lubrication [Part] 1: The Lubrication of the Piston Skirt
Report describes the lubrication characteristics of an aircraft-type piston as visually studied in a V-type engine with a glass cylinder. Information about the movement of the piston, the piston rings, and the oil-control rings and their effect on lubrication is included.
Date:
September 1945
Creator:
Shaw, Milton C. & Nussdorfer, Theodore
Object Type:
Report
System:
The UNT Digital Library
Lift Theory of Supporting Surfaces: Second Article
Memorandum presenting a description of the hydrodynamic lift theory of supporting services. This report is mainly about the task of finding suitable wing sections for given lift conditions. Formulas are given for lift magnitude and moment, which make it possible to obtain solutions of great simplicity and clearness.
Date:
September 1921
Creator:
von Mises, R.
Object Type:
Report
System:
The UNT Digital Library
The S.P.C.A. 30 M.4 Military Airplane (French): A Multiplace Low-Wing Airplane
Circular describing the S.P.C.A. 30 M.4 multiplace, which is an aircraft designed to carry four people that can be used as a fighter aircraft or a day or night bomber. Details of the design, components, engines, characteristics, performance, drawings, and photographs are provided.
Date:
September 1932
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Analysis of Heat and Compressibility Effects in Internal Flow Systems and High-Speed Tests of a Ram-Jet System
Report presenting an analysis of the effects of heat and compressibility in the flow through the internal systems of aircraft. Equations and charts are developed whereby the flow characteristics at key stations in a typical internal system may be readily obtained.
Date:
September 1942
Creator:
Becker, John V. & Baals, Donald D.
Object Type:
Report
System:
The UNT Digital Library
The Armstrong Whitworth "Starling" (British) (Single Seat Fighter)
Circular describing the Armstrong-Whitworth "Starling", which is a single seat fighter that can be used for day fighting and night fighting. Details of the wings, wing bracing, lift characteristics, construction, internal components, characteristics, drawings, and photographs are provided.
Date:
September 1928
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The Propeller and Cooling-Air-Flow Characteristics of a Twin-Engine Airplane Model Equipped With NACA D(Sub S)-Type Cowlings and With Propellers of NACA 16-Series Airfoil Sections
Report presenting an investigation in the 19-foot pressure tunnel to determine the nacelle drag, the cowling-air flow, and the propeller characteristics of a model of a high-performance military airplane. The model is fitted with NACA D(sub S)-type engine cowlings and with propellers embodying NACA 16-series airfoil sections. Results regarding the propeller characteristics, drag and cowling-air flow with the propeller removed, the effect of propeller on flow through cowling, and the influence of cooling requirements on airplane performance are provided.
Date:
September 1944
Creator:
McHugh, James G. & Pepper, Edward
Object Type:
Report
System:
The UNT Digital Library
Notes on the Effect of Surface Distortions on the Drag and Critical Mach Number of Airfoils
"The effect of two-dimensional bumps and surface waviness on the pressure distribution over airfoils is considered. It is shown that the results of the analysis may be useful in evaluating the effects of accidental or intended surface distortions on the drag and critical Mach number of airfoils" (p. 1).
Date:
September 1943
Creator:
Allen, H. Julian
Object Type:
Report
System:
The UNT Digital Library