362 Matching Results

Search Results

Advanced search parameters have been applied.

High-Altitude Performance of an Experimental Turbular Prevaporizing Combustor

Description: Memorandum presenting an investigation of an experimental tubular combustor that provides for prevaporizing and premixing of the fuel with a part of the air before its introduction into the combustion zone. Combustion efficiency and total-pressure loss data are presented for three configurations selected from a total of 43 different modifications investigated. Results regarding the combustor development, comparison of liquid and gaseous fuel, combustor total-pressure losses, combustor-outlet temperature distribution, and evaluation of experimental prevaporizing combustors are provided.
Date: December 9, 1954
Creator: Butze, Helmut F.
Partner: UNT Libraries Government Documents Department

Infrared Spectra of 59 Dicyclic Hydrocarbons

Description: "The infrared spectra are presented for 59 dicyclic hydrocarbons consisting of some diphenylalkanes, dicyclohexyalkanes, alkylbiphenyls and alkylbicyclohexyls ranging from C(sub 12) through C(sub 18). The physical properties of these compounds, which were available in a high state of purity, are tabulated for reference purposes" (p. 1).
Date: November 1951
Creator: Serijan, K. T.; Goodman, I. A. & Yankauskas, W. J.
Partner: UNT Libraries Government Documents Department

The Lead Susceptibility of Fuels and Its Dependence on the Chemical Composition

Description: The fact that by the use of tetraethyl lead a number of otherwise unsuitable fuels could be made to meet engine requirements was not sufficiently appreciated. While use of tetraethyl lead is limited, the addition of special leaded fuels that increase the octane number is a requirement for many fuels. In this connection, the extent to which the action of tetraethyl lead through the addition of knock-resistant hydrocarbons to the base gasoline is influenced, is quite important. To the elucidation of this problem and of the storage stability of leaded fuels, the present report is dedicated.
Date: April 1940
Creator: Widmaier, O.
Partner: UNT Libraries Government Documents Department

The Problem of Liquid Fuels (for Aircraft Engines)

Description: "The crisis which troubles the world market for liquid fuel in general and for carburants in particular is doubtless one of the most serious ever experienced by modern industry. It is a national crisis of economic and political independence for countries like Italy and France. The solutions suggested for meeting the lack of liquid fuel may be summed up under two general headings: the economical use of the petroleum now available; creation of petroleum substitutes from natural sources within the country" (p. 1).
Date: July 1924
Creator: Gallo, Gino
Partner: UNT Libraries Government Documents Department

Ignition of Ammonia and Mixed Oxides of Nitrogen in 200-Pound-Thrust Rocket Engines at 160 Degrees F

Description: Memorandum presenting a study of the ignition of ammonia and mixed oxides of nitrogen at 160 degrees Fahrenheit made with and without fuel additives utilizing small-scale rocket engines of approximately 200 pounds thrust. All experiments were conducted at sea-level pressures except two at a range of pressure altitudes. Results regarding the use of lithium as a catalyst, calcium as a catalyst, and no apparent catalyst are provided.
Date: May 13, 1954
Creator: Hennings, Glen; Ladanyi, Dezso J. & Enders, John H.
Partner: UNT Libraries Government Documents Department

Some Effects of Exposure to Exhaust-Gas Streams on Emittance and Thermoelectric Power of Bare-Wire Platinum Rhodium - Platinum Thermocouples

Description: Thermocouples were exposed to exhaust gases from the combustion of propane, 72-octane gasoline, and JP-4 fuel. Exposure increased the emissivity of the thermocouple wire, which increased its radiation error. Two methods are presented for determining the emittance of the wires. The emissivity of a clean platinum rhodium-platinum thermocouple was approximately 0.2 in the temperature range investigated, while the emittance of an exposed thermocouple coated with exhaust residue was about 0.5. The exposure caused negligible change in the thermoelectric power of the thermocouples.
Date: August 1954
Creator: Glawe, George E. & Shepard, Charles E.
Partner: UNT Libraries Government Documents Department

Effect of Free Methyl Radicals on Slow Oxidation of Propane and Ethane

Description: Memorandum presenting a study of the effect of free methyl radicals on the slow oxidation of both ethane and propane by means of a photochemical decomposition reaction in a static system. The introduction of methyl radicals into a mixture of propane and oxygen or ethane and oxygen substantially lowered the initiation temperature of the combustion of the hydrocarbon.
Date: August 28, 1952
Creator: McDonald, Glen E. & Schalla, Rose L.
Partner: UNT Libraries Government Documents Department

Effect of Water on Carbon Monoxide-Oxygen Flame Velocity

Description: "The flame velocities were measured of 20 percent oxygen and 80 percent carbon monoxide mixtures containing either light water or heavy water. The flame velocity increased from 34.5 centimeters per second with no added water to about 104 centimeters per second for a 1.8 percent addition of light water and to 84 centimeters per second for an equal addition of heavy water. The addition of heavy water caused greater increases in flame velocity with equilibrium hydrogen-atom concentration than would be predicted by the Tanford and Pease square-root relation" (p. 1).
Date: February 5, 1954
Creator: McDonald, Glen E.
Partner: UNT Libraries Government Documents Department

Measurement of Uniform Flame Movement in Carbon Monoxide - Air Mixtures Containing Either Added D2O or H2O

Description: Relative velocities of the flame in a carbon monoxide - air mixture containing either added heavy water or light water were measured in a glass tube. Throughout the range of carbon monoxide - air composition, the flame containing added light water had a faster speed than the flame containing heavy water.
Date: July 5, 1950
Creator: McDonald, Glen E.
Partner: UNT Libraries Government Documents Department

The Gaseous Explosive Reaction at Constant Pressure: The Reaction Order and Reaction Rate

Description: The data given in this report covers the explosive limits of hydrocarbon fuels. Incidental to the purpose of the investigation here reported, the explosive limits will be found to be expressed for the condition of constant pressure, in the fundamental terms of concentrations (partial pressures) of fuel and oxygen.
Date: May 9, 1929
Creator: Stevens, F. W.
Partner: UNT Libraries Government Documents Department

Summary of the Availability and Performance Problems of High Octane Number Fuels

Description: Memorandum presenting a study to determine the possible blending agents or additives that may be used to supplement current high performance number, rich rating components in future aviation fuels. The study indicated that such high rich rating blending agents as toluene and xylene cannot be made available in sufficient quantities to maintain the rich rating performance of the fuels when reducing the lead content from 4.6 to 3.0 ml per gallon.
Date: April 15, 1949
Creator: NACA Committee on Aircraft Fuels
Partner: UNT Libraries Government Documents Department

Summary of NACA Research on Ignition Lag of Self-Igniting Fuel - Nitric Acid Propellants

Description: Memorandum presenting a summary of ignition-lag data obtained from 1949 to 1956 in terms of dependence on temperature, pressure, reactor geometry, mixing method, and propellant composition. Analysis of the results and comparisons with data from other sources indicate agreement with a chemical kinetics model provided that mixing is reasonably energetic.
Date: October 3, 1957
Creator: Morrell, Gerald
Partner: UNT Libraries Government Documents Department

The Synthesis and Purification of Aromatic Hydrocarbons 2: 1, 2, 4-Trimethylbenzene

Description: Note presenting a new method for the synthesis and purification of a 14-gallon quantity of 1,2,4-trimethylbenzene. The method consists in the chloromethylation of m- and p-xylenes, subsequent formation of ethyl dimethylbenzyl ethers, and hydrogenolysis of the ethers to yield the hydrocarbon. Results regarding chloromethylation of xylene, conversion of dimethylbenzyl chlorides to ethyl dimethylbenzyl ethers, hydrogenolysis of the ethyl dimethylbenzyl ethers, and identification of biproducts are provided.
Date: January 1946
Creator: Ebersole, Earl R.
Partner: UNT Libraries Government Documents Department

Correlation of Physical Properties With Molecular Structure for Some Dicyclic Hydrocarbons Having High Thermal-Energy Release Per Unit Volume

Description: "As part of a program to study the correlation between molecular structure and physical properties of high-density hydrocarbons, the net heats of combustion, melting points, boiling points, densities, and kinematic viscosities of some hydrocarbons in the 2-n-alkylbiphenyl, 1,1-diphenylalkane, diphenylalkane, 1,1-dicyclohexylalkane, and dicyclohexylalkane series are presented" (p. 55).
Date: June 20, 1949
Creator: Wise, P. H.; Serijan, K. T. & Goodman, I. A.
Partner: UNT Libraries Government Documents Department

Performance of pure fuels in a single J33 combustor 1: five liquid hydrocarbon fuels

Description: Report presenting an investigation of several pure hydrocarbon fuels in a single tubular-type combustor in order to determine possible relations between combustor performance and fuel properties. The combustor temperature rise, combustion efficiency, and blow-out limits were determined with five liquid hydrocarbon fuels of high purity over a range of heat input and air-flow rates and at two inlet-air-temperature conditions. Performance parameters were selected to compare with the physical and fundamental combustion properties of the fuel.
Date: November 21, 1952
Creator: Wear, Jerrold D. & Dittrich, Ralph T.
Partner: UNT Libraries Government Documents Department

Investigation of an afterburning ramjet using gaseous hydrogen as fuel at Mach number of 3.0

Description: Report presenting an investigation in the 10- by 10-foot supersonic wind tunnel on a 16-inch ramjet equipped with an afterburner and using gaseous hydrogen for the primary and afterburner fuels. The primary nozzle had a contraction ratio of 0.6 and the exit nozzle had a contraction ratio of 0.9. The results indicated that at a constant diffuser-exit Mach number, afterburner operation produces more than twice the thrust available without afterburning.
Date: June 17, 1957
Creator: Wasserbauer, Joseph F.
Partner: UNT Libraries Government Documents Department

Correlation of effects of fuel-air ratio, compression ratio, and inlet-air temperature on knock limits of aviation fuels

Description: Report presenting a method of relating the effects of fuel-air ratio on the knock-limited charge flow and power of a supercharged engine with those of compression ratio and inlet-air temperature. Knock data obtained in a CFR engine over a wide range of conditions were correlated with eight fuels: 28-R fuel, aviation alkylate, S reference fuel, diisopropyl, triptane, cyclohexane, cyclopentane, and triptene.
Date: April 1950
Creator: Tower, Leonard K. & Alquist, Henry E.
Partner: UNT Libraries Government Documents Department

Maximum permissible engine performance of eight representative fuels of 100-octane number

Description: Report presenting knock-limited performance tests made with eight representative fuels rated at 100-octane number using the CFR aviation method. All eight fuels were mixtures of representative blending agents and bases. Results regarding the effect of inlet-temperature air changes, effect of octane numbers in a full-scale single-cylinder engine, effect of addition of aromatics to the fuels, and type of spark plug used are provided.
Date: January 1942
Creator: Rothrock, Addison M.; Biermann, Arnold E. & Corrington, Lester C.
Partner: UNT Libraries Government Documents Department

Gasoline-water distribution coefficients of xylidines

Description: Report presenting experimental data on the distribution coefficients of technical xylidines for the system gasoline-water. The distribution coefficient is defined as the ratio of the concentration of xylidines in the gasoline layer to that in the water layer. Results regarding the effect of concentration of xylidines, effect of aromatic content of fuel, effect of sea water, and effect of temperature are provided.
Date: June 1943
Creator: Tischler, Adelbert O.; Slabey, Vernon A. & Olson, Walter T.
Partner: UNT Libraries Government Documents Department

NACA research on slurry fuels through 1954

Description: Report presenting a review of NACA research on slurry fuels through 1954. Slurry fuels are defined as suspensions of metals in hydrocarbons, which may offer more flight range or thrust than can be obtained with conventional hydrocarbons. Magnesium is the primary metal of interest at this time for high thrust and boron for long-range flight.
Date: April 21, 1955
Creator: Olson, Walter T. & Breitwieser, Roland
Partner: UNT Libraries Government Documents Department

A review of NACA research through 1954 on boron compounds as fuels for jet aircraft (Project Zip)

Description: Report presenting NACA work through 1954 on a high-energy fuel suitable for turbojet-powered aircraft. The work includes thermal and combustion properties, experiments with combustors designed to use boron compounds, evaluation of boron fuels in full-scale turbojets with and without afterburners, and ramjet flights on boron fuels. Satisfactory combustion of pentabornae and high-concentration blends of pentaborane has been demonstrated in a turbojet, an afterburner, and a ram jet.
Date: April 12, 1957
Creator: Olson, Walter T.; Breitwieser, Roland & Gibbons, Louis C.
Partner: UNT Libraries Government Documents Department

Status of combustion research on high-energy fuels for ram jets

Description: Report presenting a review of the present status of research and development on high-energy fuels for ramjet propulsion. It also presents experimental investigations on the use of high-energy fuels in ram jets that include the materials aluminum, boron, boron hydrides, carbon, coal and coal-light metal compositions, liquid hydrogen, and magnesium. A comparison of the fuels in terms of heating values, combustion temperatures and specific impulse, and availability of fuels are provided.
Date: October 3, 1951
Creator: Olson, Walter T. & Gibbons, Louis C.
Partner: UNT Libraries Government Documents Department