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Simulation of Linearized Dynamics of Gas-Turbine Engines

Description: Note describing a method of engine simulation involving the use of an electronic analog computer in the simulation of controlled aircraft-engine performance. The equations used in developing the method of simulating the dynamics of gas-turbine engines are derived in general form from engine functional relations.
Date: November 1952
Creator: Ketchum, J. R. & Craig, R. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Method for rapid graphical evaluation of cooled or uncooled turbojet and turboprop engine or component performance (effects of variable specific heat included)

Description: Report presenting a series of curves that have been prepared to simplifying and accelerate calculation procedures for component or overall cycle performance of gas-turbine engines. The curves are based on the thermodynamic properties of air and combustion gases for a hydrogen-combustion ratio of 0.167.
Date: January 1955
Creator: Esgar, Jack B. & Ziemer, Robert R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Physical Properties at Elevated Temperature of Seven Hot-Pressed Ceramics

Description: Report presenting an investigation of seven hot-pressed ceramics for possible gas-turbine application. The properties, short-time tensile strength, thermal-shock resistance, coefficient of liner expansion, and density were determined. The ceramics tested were magnesium oxide, titanium carbide, zirconium carbide, boron carbide, silicon carbide with boron carbide, zircon, and zirconia with lime.
Date: July 1949
Creator: Gangler, James J.; Robards, Chester F. & McNutt, James E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental and Analytical Study of Balanced-Diaphragm Fuel Distributors for Gas-Turbine Engines

Description: "A method of distributing fuel equally to a plurality of spray nozzles in a gas-turbine engine by means of balanced-diaphragm fuel distributors is presented. The experimental performance of three of eight possible distributor arrangements are discussed. An analysis of all eight arrangements is included. Criterions are given for choosing a fuel-distributor arrangement to meet specific fuel-system requirements of fuel-distribution accuracy, spray-nozzle pressure variations, and fuel-system pressu… more
Date: August 14, 1950
Creator: Straight, David M. & Gold, Harold
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Control during starting of gas-turbine engines

Description: Report presenting an investigation of the variables pertinent to the control of gas temperatures of gas-turbine engines during starting conducted by obtaining time records of the variables involved during actual starting conditions. Poor control of gas temperatures during starting was found to be caused by an accumulation of fuel in the engine before ignition and excessive fuel-flow rates at the time of ignition.
Date: June 17, 1948
Creator: Koenig, Robert J. & Dandois, Marcel
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Gas-turbine-engine operation with variable-area fuel nozzles

Description: Report presenting an examination of the characteristics of variable-area and fixed-area atomizing nozzles in relation to use in aircraft gas-turbine engines. A variable-area fuel nozzle and a fuel-distribution control that were used int eh experimental operation of a turbojet engine are described. Results regarding nozzle characteristics and fuel distribution, effect of atomization on engine operating characteristics, and fuel-system characteristics during engine operation are provided.
Date: July 9, 1948
Creator: Gold, Harold & Straight, David M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Instrumentation for Recording Transient Performance of Gas-Turbine Engines and Control Systems

Description: Report presenting design features for the instrumentation used in a study of the transient performance of gas-turbine engines and control systems. The dynamic characteristics of the instrumentation are discussed and examples of typical acceleration data for a controlled and an uncontrolled engine are provided.
Date: June 27, 1951
Creator: Delio, Gene J. & Schwent, Glennon V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

General algebraic method applied to control analysis of complex engine types

Description: "A general algebraic method of attack on the problem of controlling gas-turbine engines having any number of independent variables was utilized employing operational functions to describe the assumed linear characteristics for the engine, the control, and the other units in the system. Matrices were used to describe the various units of the system, to form a combined system showing all effects, and to form a single condensed matrix showing the principal effects. This method directly led to the … more
Date: April 25, 1949
Creator: Boksenbom, Aaron S. & Hood, Richard
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Factors Affecting the Starting Characteristics of Gas-Turbine Engines

Description: "This report summarizes the effects of fuel volatility and engine design variables on the problem of starting gas-turbine engines at sea-level and altitude conditions. The starting operation for engines with tubular combustors is considered as three steps; namely, (1) ignition of a fuel-air mixture in the combustor, (2) propagation of flame through cross-fire tubes to all combustors, and (3) acceleration of the engine from windmilling or starting speed to the operating speed range. Pertinent da… more
Date: February 8, 1951
Creator: Lewis Laboratory Fuels Panel
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Influence of Rotor-Engine Torsional Oscillation on Control of Gas-Turbine Engine Geared to Helicopter Rotor

Description: "Equations were developed for the torsional motion of a gas-turbine engine geared to a helicopter rotor in which the rotor blades were hinged to the rotor shaft. The rotor system was simplified to yield simple third-order equations that can be used in the analysis of engine control. Comparison of the system response calculated from these equations with the experimentally observed frequency response of a rotor from a 2500-pound helicopter showed satisfactory agreement" (p. 1).
Date: October 1953
Creator: Sanders, John C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Trends of Rolling-Contact Bearings as Applied to Aircraft Gas-Turbine Engines

Description: Note presenting a review of the present and future trends of rolling-contact bearings for aircraft gas-turbine engines, which indicates that while rolling-contact bearings are satisfactory for present production engines, new bearings for future, higher output aircraft engines require more development. These new engines have operating conditions resulting in two primary problems: cage materials and endurance of materials for raceways and rolling elements.
Date: April 1954
Creator: Panel on High-Speed Rolling-Contact Bearings
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preliminary Investigation of the Control of a Gas-Turbine Engine for a Helicopter

Description: An analog investigation of the power plant for a gas-turbine powered helicopter indicates that currently proposed turbine-propeller engine controls are satisfactory for helicopter application. Power increases from one-half to full rated at altitudes from sea level to 15,000 feet could be made in less than 4 seconds with either the rotor or propellers absorbing the engine power.
Date: September 11, 1951
Creator: Krebs, Richard P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Method for Estimating Speed Response of Gas-Turbine Engines

Description: Memorandum presenting a brief method for estimating the speed response of turbojet and turbine-propeller engines to a step change in fuel flow. The method approximates the dynamic equilibrium in the gas-turbine engine with a first-order linear differential equation, the time constant of which varies inversely with the equilibrium speed. Engine time constants computed by means of this method are compared with time-constant data obtained by direct measurement of transient on three turbojet engine… more
Date: January 23, 1952
Creator: Gold, Harold & Rosenzweig, Solomon
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Theoretical Performance of an Axial-Flow Compressor in a Gas-Turbine Engine Operating With Inlet Water Injection

Description: Note presenting an evaluation of the theoretical performance with inlet water injection of an axial-flow compressor operating as a component of a gas-turbine engine for normal compressor pressure ratios of 4, 8, and 16. Continuous saturation throughout the compression process is assumed. Results regarding the compressor-inlet gas flow, compressor performance, and applicability of the analysis are provided.
Date: March 1952
Creator: Hensley, Reece V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dynamic Response of Turbine-Blade Temperature to Exhaust-Gas Temperature for Gas-Turbine Engines

Description: "The frequency of blade temperature to exhaust gas temperature is presented for two locations in the blade and at several operating conditions. The frequency response was determined by Fourier analysis of transient data. Two analytical methods are presented, and results are compared with experimental data. Dynamic response of turbine-blade temperature to exhaust-gas temperature exhibited the form of an approximate first-order lag" (p. 1).
Date: February 20, 1952
Creator: Hood, Richard & Phillips, William E., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Government/industry partnership: A revolutionary approach in global leadership of advanced gas turbines

Description: The U.S. Department of Energy (DOE) has established a government/industry partnership program to greatly improve the capabilities of U.S. gas turbine technology. A new and challenging program named the Advanced Turbine Systems Program (ATS) has been initiated by DOE. The technical and business objectives of this initiative are to challenge the bounds of high performance capabilities of gas turbines, meet stringent environmental requirements, and produce lower cost electric power and cogeneratio… more
Date: February 1, 1996
Creator: Ali, S. A. & Zeh, C. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ADVANCED GAS TURBINE SYSTEMS RESEARCH PROGRAM

Description: The quarterly activities of the Advanced Gas Turbine Systems Research (AGTSR) program are described in this quarterly report. As this program administers research, we have included all program activity herein within the past quarter as dated. More specific research progress reports are provided weekly at the request of the AGTSR COR and are being sent to NETL As for the administration of this program, items worthy of note are presented in extended bullet format following the appropriate heading… more
Date: May 1, 2003
Creator: Golan, Lawrence P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Stainless Steel Foil with Improved Creep-Resistance for Use in Primary Surface Recuperators for Gas Turbine Engines

Description: Primary surface recuperators (PSRs) are compact heat-exchangers made from thin-foil type 347 austenitic stainless steel, which boost the efficiency of land-based gas turbine engines. Solar Turbines uses foil folded into a unique corrugated pattern to maximize the primary surface area for efficient heat transfer between hot exhaust gas on one side, and the compressor discharge air on the other side of the foil. Allegheny-Ludlum produces 0.003 - 0.0035 in. thick foil for a range of current turbin… more
Date: October 12, 1998
Creator: Browning, P. F.; Fitzpatrick, M.; Grubb, J. F.; Klug, R. C.; Maziasz, P. J.; Montague, J. P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ADVANCED GAS TURBINE SYSTEMS RESEARCH

Description: The activities of the Advanced Gas Turbine Systems Research (AGRSR) program are described in the quarterly report. The report is divided into discussions of Membership, Administration, Technology Transfer (Workshop/Education) and Research. Items worthy of note are presented in extended bullet format following the appropriate heading.
Date: January 1, 2000
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of geometry on slot-jet film cooling performance

Description: Physics of film cooling for shaped, inclined slot-jets with realistic slot-length-to-width ratios is studied for a range of blowing ratio and density ratio parameters typical of gas turbine operations. Effect of inlet and exit shaping of the slot-jet on both flow and thermal field is isolated, and the dominant mechanisms responsible for differences in these items are documented. A computation method was used to study 4 configurations. Field results and surface phenomena are presented. Both adia… more
Date: December 31, 1995
Creator: Hyams, D. G.; McGovern, K. T. & Leyiek, J. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Development of lubricious coatings for advanced turbine engine applications

Description: Development of durable and low-cost high-temperature lubricants for use in gas-turbine regenerator cores is critically important for achieving improved performance and fuel-efficiency in future automotive and hybrid-electric vehicles. Successful development and implementation of such coatings could have substantial technological and economic impacts on energy conservation and could reduce dependence on imported oil. Furthermore, this technology may also contribute to a cleaner environment by re… more
Date: February 1, 1996
Creator: Erdemir, A.; Fenske, G.R. & Munson, J.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Advanced Thermal Barrier Coating System Development. Technical progress report

Description: The objectives of the program are to provide an improved TBC system with increased temperature capability and improved reliability relative to current state of the art TBC systems. The development of such a coating system is essential to the ATS engine meeting its objectives. The base program consists of three phases: Phase I: Program Planning - Complete; Phase II: Development - Complete; and Phase III: Selected Specimen - Bench Test. Work was performed in Phase II and III of the program during… more
Date: January 13, 2000
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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