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Relation of Nozzle-Blade and Turbine-Bucket Temperatures to Gas Temperatures in a Turbojet Engine

Description: Memorandum presenting an investigation conducted to determine experimentally turbine-nozzle-blade and turbine-bucket temperatures in a turbojet engine and to correlate these temperatures with the gas temperatures. Data were obtained over the normal range of engine speeds and with two tail-pipe-nozzle areas. Results regarding basic data, turbine-nozzle-blade temperature distribution, turbine-bucket-temperature distribution, temperature distribution of gas at burner-outlet, turbine-bucket tempera… more
Date: April 30, 1948
Creator: Farmer, J. Elmo
Partner: UNT Libraries Government Documents Department
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Application of an ultraviolet spectrophotometric method to the estimation of alkylnaphthalenes in 10 experimental jet-propulsion fuels

Description: Report presenting the combustion efficiencies of 10 experimental jet-propulsion fuels that are approximately 200 degrees Fahrenheit cuts of five selected crudes available in large quantities in a turbojet engine combustor at altitude conditions.
Date: April 30, 1947
Creator: Cleaves, Alden P. & Carver, Mildred S.
Partner: UNT Libraries Government Documents Department
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Preliminary evaluation of the air and fuel specific-impulse characteristics of several potential ram-jet fuels 1: octene-1, aluminum, and aluminum - octene-1 slurries

Description: Report presenting a preliminary analytical evaluation of the air and fuel specific-impulse characteristics of octene-1, aluminum, and aluminum-octene-1 slurries. The adiabatic combustion flame temperature, combustion equilibrium-gas composition, air specific impulse, and fuel-weight specific impulse are presented for each fuel. Aluminum-octene-1 slurries were found to offer a means of increasing the limited air specific impulse values available with octene-1 or hydrocarbon-type fuels.
Date: April 30, 1951
Creator: Gammon, Benson E.
Partner: UNT Libraries Government Documents Department
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Effect of Fuel Volatility on Performance of Tail-Pipe Burner

Description: Fuels having Reid vapor pressures of 6.3 and 1.0 pounds per square inch were investigated in a tail-pipe burner on an axial-flow-type turbojet engine at a simulated flight Mach number of 0.6 and altitudes from 20,000 to 45,000 feet. With the burner configuration used in this investigation, having a mixing length of only 8 inches between the fuel manifold and the flame holder, the low-vapor-pressure fuel gave lower combustion efficiency at a given tail-pipe fuel-air ratio. Because the exhaust-no… more
Date: April 30, 1951
Creator: Barson, Zelmar & Sargent, Arthur F., Jr.
Partner: UNT Libraries Government Documents Department
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Design and performance of an experimental axial-discharge mixed-flow compressor 3: over-all performance of impeller and supersonic-diffuser combination

Description: Report presenting an investigation of an axial-discharge impeller in combination with a 16-vaned supersonic diffuser cascade over a range of flow conditions at equivalent tip speeds varying from 800 to 1600 feet per second. Results regarding the overall performance of the combination, starting of diffuser cascade, use of flow bleedoff to aid starting, radial distribution of flow angle, flow characteristics within diffuser, and efficiency of diffuser cascade are provided.
Date: April 30, 1951
Creator: Wilcox, Ward W. & Robbins, William H.
Partner: UNT Libraries Government Documents Department
open access

Blowing-type boundary-layer control as applied to the trailing-edge flaps of a 35 degree swept-wing airplane

Description: A wind-tunnel investigation was made to determine the effects on the aerodynamic characteristics of a 35 degree swept-wing airplane of applying blowing-type boundary-layer control to the trailing-edge flaps. Flight tests of a similar airplane were then conducted to determine the effects of boundary-layer control on the handling qualities and operation of the airplane, particularly during landing and take-off. The wind-tunnel and flight tests indicated that blowing over the flaps produced large … more
Date: April 30, 1958
Creator: Kelly, Mark W.; Anderson, Seth B. & Innis, Robert C.
Partner: UNT Libraries Government Documents Department
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Secondary flows and boundary-layer accumulations in turbine nozzles

Description: An investigation of secondary-flow loss patterns originating in three sets of turbine nozzle blade passages was conducted by means of flow-visualization studies and detailed flow measurements. For all cases, high loss values were measured in the fluid downstream of the corners formed by the suction surfaces of the blades and the shrouds, and these losses were accompanied by discharge-angle deviations from design values. Despite the size of the loss regions and angle gradients, over-all mass-ave… more
Date: April 30, 1953
Creator: Rohlik, Harold E.; Kofskey, Milton G.; Allen, Hubert W. & Herzig, Howard Z.
Partner: UNT Libraries Government Documents Department
open access

Preliminary Altitude Performance Characteristics of the J57-P-1 Turbojet Engine with Fixed-Area Exhaust Nozzle

Description: An investigation to determine the altitude performance of the J57-P-1 turbojet engine and components was conducted at the NACA Lewis altitude wind tunnel. Data were obtained over a corrected inboard rotor speed range from 56 to 106 percent of rated speed, with intercompressor bleeds both open and closed, at altitudes from 15,000 to 50,000 feet and at a flight Mach number of 0.81. The corresponding range of Reynolds number indices was from 0.858 to 0.213. All data presented were obtained with a … more
Date: April 30, 1954
Creator: Bloomer, Harry E. & Miller, Robert R.
Partner: UNT Libraries Government Documents Department
open access

Experimental Permeability Measurements on a Strut-Supported Transpiration-Cooled Turbine Blade with Stainless-Steel Shell made by the Federal-Mogul Corporation under Bureau of Aeronautics Contract N0as 51613-C

Description: A turbine blade with a porous stainless-steel shell sintered to a supporting steel strut has been fabricated for tests at the NACA by Federal-Mogul Corporation under contract from the Bureau of Aeronautics, Department of the Navy. The apparent permeability of this blade, on the average, more nearly approaches the values specified by the NAGA than did two strut-supported bronze blades in a previous investigation. Random variations of permeability in the present blade are substantialy greater tha… more
Date: April 30, 1954
Creator: Richards, Hadley T.
Partner: UNT Libraries Government Documents Department
open access

Investigation of conditions for spontaneous ignition and combustion efficiency of pentaborane in a small-scale combustor

Description: Report presenting an investigation using a small-scale ramjet combustor to determine the conditions for spontaneous ignition of pentaborane, amyl nitrate, propylene oxide, and JP-4 fuel. For the range of conditions investigated, the threshold of spontaneous ignition of pentaborane is primarily governed by temperature and is also influenced by burner length and configuration. Combustion efficiency was found to increase in burner length and blocked area of the flame holder.
Date: April 30, 1957
Creator: Lord, Albert M. & Morris, James F.
Partner: UNT Libraries Government Documents Department
open access

Component Performance Investigation of J71 Experimental Turbine 9 - Effect of First-Stator Adjustment;Internal Flow Conditions of J71-97 Turbine With 87-Percent-Design Stator Area

Description: "An experimental radial-survey investigation of the J71-97 three-stage turbine equipped with a first stator having a throat area 87 percent of the design value was conducted at one turbine operating point. The first-, second-, and third-stage mass-averaged efficiencies were 0.897, 0.843, and 0.755, respectively. The corresponding over-all turbine efficiency was 0.856" (p. 1).
Date: April 30, 1957
Creator: Schum, Harold J.; Petrash, Donald A. & Davison, Elmer H.
Partner: UNT Libraries Government Documents Department
open access

Wind-tunnel tests of the static longitudinal characteristics at low speed of a swept-wing airplane with slotted flaps, area-suction flaps, and wing leading-edge devices

Description: Report presenting a low-speed wind-tunnel investigation of a high-wing airplane with an aspect ratio of 6.75 and 36 degrees of sweepback on the quarter-chord line in order to determine the lift increments obtainable with area-suction flaps. Comparisons were made to the slotted flaps normally used. Results regarding the flap lift, maximum lift and stability, and boundary-layer control requirements are provided.
Date: April 30, 1957
Creator: Maki, Ralph L. & James, Harry A.
Partner: UNT Libraries Government Documents Department
open access

The quiescent-chamber type compression-ignition engine

Description: Report presents the results of performance tests of a single-cylinder 4-stroke-cycle compression-ignition engine having a vertical disk form of combustion chamber without air flow. The number, size, and direction of the orifices of the fuel-injection nozzles used were independently varied. A table and graphs are presented showing the performance of the engine with different nozzles; results of tests at different compression ratios, boost pressures, and coolant temperatures are also included.
Date: April 30, 1936
Creator: Foster, H. H.
Partner: UNT Libraries Government Documents Department
open access

China's Rare Earth Industry and Export Regime: Economic and Trade Implications for the United States

Description: Over the past few years, the Chinese government has implemented a number of policies to tighten its control over the production and export of "rare earths"-a unique group of 17 metal elements on the periodic table that exhibit a range of special properties, such as magnetism, luminescence, and strength. Rare earths are important to a number of high technology industries, including renewable energy and various defense systems. This report examines the economic and trade implications of China's … more
Date: April 30, 2012
Creator: Morrison, Wayne M. & Tang, Rachel
Partner: UNT Libraries Government Documents Department
open access

United States v. Jones: GPS Monitoring, Property, and Privacy

Description: In United States v. Jones, 132 S. Ct. 945 (2012), a Global Positioning System (GPS) device was attached to the undercarriage of Jones's car by the police to track his movements for four weeks. This report will examine three decisions regarding searching, attachment, and monitoring in an effort to find their place in the body of existing Fourth Amendment law pertaining to privacy, property, and technology.
Date: April 30, 2012
Creator: Thompson, Richard M., II
Partner: UNT Libraries Government Documents Department
open access

Mining on Federal Lands: Hardrock Minerals

Description: This report discusses the mining of hardrock minerals on fedearl lands, which is governed by the claim-patent system under the General Mining Law of 1872. It gives an overview the issues involved with the current system, such as competing land uses, and discusses proposed legislation meant to reform the claim-patent system.
Date: April 30, 2008
Creator: Humphries, Marc
Partner: UNT Libraries Government Documents Department
open access

Congressional Primer on Responding to Major Disasters and Emergencies

Description: This report covers the role of the government in disaster management. While the disaster response and recovery process is fundamentally a relationship between the federal government and the requesting state government, there are roles for congressional offices to play in providing information to the federal/state response and recovery teams in their respective states and districts, and as a source of accurate and timely information to their constituents.
Date: April 30, 2014
Creator: McCarthy, Francis X. & Brown, Jared T.
Partner: UNT Libraries Government Documents Department
open access

Nuclear Waste: Process to Remove Radioactive Waste From Savannah River Tanks Fails to Work

Description: A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on the Department of Energy's (DOE) efforts to clean up nuclear waste at DOE's Savannah River Site in South Carolina, focusing on: (1) the factors causing the project's delays and cost growth; (2) the effect of the in-tank precipitation process project's suspension on the Savannah River Site's cleanup plans and costs; and (3) DOE's plans for develop… more
Date: April 30, 1999
Creator: United States. General Accounting Office.
Partner: UNT Libraries Government Documents Department
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Aviation Finance: Distribution of Airport Grant Funds Complied with Statutory Requirements

Description: A letter report issued by the General Accounting Office with an abstract that begins "The Federal Aviation Administration (FAA) administers the Airport Improvement Program (AIP), which provides billions of dollars in federal grants to airports for planning and development projects. The total funds awarded by FAA was consistent with the total amount of AIP funds available for obligation for fiscal years 1996 through 2000. FAA also made available or awarded AIP grant funds in accordance with the … more
Date: April 30, 2002
Creator: United States. General Accounting Office.
Partner: UNT Libraries Government Documents Department
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Computer-Based Patient Records: Better Planning and Oversight By VA, DOD, and IHS Would Enhance Health Data Sharing

Description: A letter report issued by the General Accounting Office with an abstract that begins "In November 1997, the President called for the Department of Veterans Affairs (VA) and the Department of Defense (DOD) to create an interface that would allow the two agencies to share patient health information. By allowing health care providers to electronically share comprehensive patient information, computer-based patient record's (GCPR) should help VA, DOD, and the Indian Health Service (IHS) to improve … more
Date: April 30, 2001
Creator: United States. General Accounting Office.
Partner: UNT Libraries Government Documents Department
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Electronic Records: Clinton Administration's Management of Executive Office of the President E-Mail System

Description: A letter report issued by the General Accounting Office with an abstract that begins "This report discusses the facts surrounding the ability of the Clinton White House to preserve certain electronic mail (e-mail) deemed official government records. GAO found that two malfunctions occurred in the White House e-mail system that prevented official records from being properly recorded in the Automated Records Management System (ARMS). The first problem involved an anomaly with incoming Internet e-… more
Date: April 30, 2001
Creator: United States. General Accounting Office.
Partner: UNT Libraries Government Documents Department
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Financial Audit: Capitol Preservation Fund's Fiscal Years 2000 and 1999 Financial Statements

Description: A letter report issued by the General Accounting Office with an abstract that begins "GAO audited the financial statements of the Capitol Preservation Fund for fiscal years 2000 and 1999. GAO found that the financial statements were presented fairly in conformity with U.S. generally accepted accounting principles, contained no material weaknesses in internal control over financial reporting (including safeguarding assets) and complied with the provisions of laws and regulations tested."
Date: April 30, 2001
Creator: United States. General Accounting Office.
Partner: UNT Libraries Government Documents Department
open access

Student Financial Aid: Monitoring Aid Greater Than Federally Defined Need Could Help Address Student Loan Indebtedness

Description: A letter report issued by the General Accounting Office with an abstract that begins "Over half of the $80.4 billion in financial aid provided to college students in the 2000-01 school year came from the federal government in the form of grants and loans provided under Title IV of the Higher Education Act (HEA). To help finance their education, students and families may have received other funds from states, private groups or lenders, and/or the schools themselves. We initiated this study to, a… more
Date: April 30, 2003
Creator: United States. General Accounting Office.
Partner: UNT Libraries Government Documents Department
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