WorldCat Identities

Aircraft Engine Research Laboratory

Overview
Works: 296 works in 306 publications in 1 language and 364 library holdings
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Most widely held works by Aircraft Engine Research Laboratory
Heat-transfer tests of a steel cylinder barrel with aluminum fins with improved bonding between steel barrel and aluminum base by Herman H Ellerbrock( Book )

2 editions published in 1940 in English and held by 3 WorldCat member libraries worldwide

The finning of conventional cylinder barrels cannot be improved to any great extent except by adding find weight which means, in general, fin width. By a conventional cylinder barrel is meant a steel barrel with steel fins. For in-line engine and in some cases radial engine installations the width of the barrel fins is limited and a possible solution of the barrel-cooling problem is to use preformed aluminum fins on a steel barrel. If a reasonably satisfactory bond between the aluminum and steel is obtained, the heat transfer of the barrel should be greatly improved
Cooling of gas turbines by W. Byron Brown( Book )

2 editions published in 1947 in English and held by 2 WorldCat member libraries worldwide

Analysis of spark-ignition engine knock as seen in photographs taken at 200,000 frames a second by Cearcy D Miller( Book )

1 edition published in 1946 in English and held by 2 WorldCat member libraries worldwide

A motion-picture of the development of knock in a spark-ignition engine is presented, which consists of 20 photographs taken at intervals of 5 microseconds, or at a rate of 200,000 photographs a second, with an equivalent wide-open exposure time of 6.4 microseconds for each photograph. A motion picture of a complete combustion process, including the development of knock, taken at the rate of 40,000 photographs a second is also presented to assist the reader in orienting the photographs of the knock development taken at 200,000 frames per second are analyzed and the conclusion is made that the type of knock in the spark-ignition engine involving violent gas vibration originates as a self-propagating disturbance starting at a point in the burning or autoigniting gases and spreading out from that point through the incompletely burned gases at a rate as high as 6800 feet per second, or about twice the speed of sound in the burned gases. Apparent formation of free carbon particles in both the burning and the burned gas is observed within 10 microseconds after passage of the knock disturbance through the gases
Effect of centrifugal force on the elastic curve of a vibrating cantilever beam by Scott H Simpkinson( Book )

1 edition published in 1948 in English and held by 2 WorldCat member libraries worldwide

A study was made to determine the effect of rotation on the dynamic-stress distribution in vibrating cantilever beams. The results of a mathematical analysis are presented together with experimental results obtained by means of stroboscopic photographs and strain gages. The theoretical analysis was confined to uniform cantilever beams; the experimental work was extended to include a tapered cantilever beam to simulate an aircraft propeller blade. Calculations were made on a nondimensional basis for second- and third-mode vibration; the experiments were carried out on beams of various lengths, materials, and cross sections for second-mode vibration. From this investigation it was concluded that high vibratory-stress positions are unaffected by the addition of centrifugal force at rotary speeds as high as 100 percent above the normal operating speed range of present aeronautical equipment. Nonrotating vibration surveys of blades therefore are valuable in predicting high vibratory-stress locations under operating conditions
Operating temperatures of a sodium-cooled exhaust valve as measured by a thermocouple by Julio Sanders( Book )

1 edition published in 1943 in English and held by 2 WorldCat member libraries worldwide

A thermocouple was installed in the crown of a sodium-cooled exhaust valve. The valve was then tested in an air-cooled engine cylinder and valve temperatures under various engine operating conditions were determined. A temperature of 1337 degrees F was observed at a fuel-air ratio of 0.064, a brake mean effective pressure of 179 pounds per square inch, and an engine speed of 2000 rpm. Fuel-air ratio was found to have a large influence on valve temperature, but cooling-air pressure and variation in spark advance had little effect. An increase in engine power by change of speed or mean effective pressure increased the valve temperature. It was found that the temperature of the rear spark-plug bushing was not a satisfactory indication of the temperature of the exhaust valve
The NACA balanced-diaphragm dynamometer-torque indicator by Charles S Moore( Book )

1 edition published in 1944 in English and held by 2 WorldCat member libraries worldwide

A balanced-diaphragm device for measuring dynamometer torque of single-cylinder or multi-cylinder engines is described. This device, which was developed for laboratory use, has proved to be accurate, reliable, and adaptable. Compressed air, automatically controlled, is used as the balancing and the transmitting fluid; thus, a simple method of obtaining torque measurement at a remote position is provided
Knock-limited performance of pure hydrocarbons blended with a base fuel in a ful-scale, aircraft-engine cylinder. 3 - Four aromatics, six ethers by Anthony W Jones( Book )

1 edition published in 1946 in English and held by 2 WorldCat member libraries worldwide

Knock-limited performance tests of leaded blends of four pure aromatic hydrocarbons and six pure ethers with a base fuel were conducted in a full-scale aircraft-engine cylinder at two operating conditions to determine the antiknock effectiveness of additions of pure compounds to aviation fuels
Small-orifice tubes for minimizing dilution in exhaust-gas samples by Harvey A Cook( Book )

1 edition published in 1943 in English and held by 2 WorldCat member libraries worldwide

An investigation was undertaken to find a means of obtaining undiluted exhaust-gas samples from a Wright R-2600-B aircraft engine equipped with short individual stacks (approximately 10 in. long). Preliminary tests to aid in determining the best design, location, and orientation of orifices ranging from a 0.002-inch slot to an 0.1875-inch-diameter circular opening at the entrance to an exhaust sampling tube were made with a small Briggs & Stratton engine. Sampling tubes 1/4 inch in diameter and with a 0.010-inch-slot orifice were installed in all 14 cylinders of the Wright engine after the correct location and orientation for the sampling tubes had been determined in tests on a single cylinder of this engine. Samples were analyzed by an Orsat portable apparatus and by an NACA mixture indicator
Performance characteristics of a Junkers Jumo 211F engine supercharger with a DVL fully shrouded impeller and scroll diffuser by J. Austin King( Book )

1 edition published in 1945 in English and held by 2 WorldCat member libraries worldwide

A German supercharger from a Junkers Jumo 211F engine was tested by the NACA. The supercharger differed from conventional American superchargers in that it had a fully shrouded impeller, which discharged through a very short vaneless diffuser into a scroll-collector case
The effect of increase in combustion-air inlet temperature from 80 to 130 degrees F on the sea-level performance of a 22-inch-diameter pulse-jet engine by Michael F Valerino( Book )

1 edition published in 1946 in English and held by 2 WorldCat member libraries worldwide

The results show that when the combustion-air temperature was increased from 80 to 130 degrees F for the same conditions of fuel flow and simulated ram pressure, the jet thrust was reduced about 6 to 10 percent, which is roughly equivalent to the percentage increase in absolute temperature of the combustion air. This reduction in jet thrust was accompanied by a reduction of only 0 to 4 percent in combustion-air flow thus indicating that the loss in engine performance with increase in combustion-air temperature is due to reduced engine thermal efficiency as well as decreased combustion-air consumption
End-zone water injection as a means of suppressing knock in a spark-ignition engine by Rinaldo J Brun( Book )

3 editions published between 1944 and 1945 in English and held by 2 WorldCat member libraries worldwide

An investigation has been made of the effectiveness of water injection into the combustion end zone of a spark-ignition engine cylinder for the suppression of knock
Knocking tendency of an air-cooled aircraft-engine cylinder with one and with two spark plugs by R. C Spencer( Book )

1 edition published in 1943 in English and held by 2 WorldCat member libraries worldwide

Tests have been conducted with an air-cooled aircraft-engine cylinder to determine the effect on the knocking tendency of cutting out one spark plug when the engine is operating at or near the knock point with two spark plugs firing
A correlation of the effects of compression ratio and inlet-air temperature on the knock limits of aviation fuels in a CFR engine - 2 by Henry E Alquist( Book )

1 edition published in 1946 in English and held by 2 WorldCat member libraries worldwide

The knock-limited performance of nine fuels, comprising isolated members of four classes of hydrocarbons, paraffins, cycloparaffins, and olefins), is presented in the form of three-dimensional plots of fuel-air ratio, compression temperature, and compression-air density. The plots are based on a correlation that is shown to apply for these fuels over a wide range of compression that is shown to apply for these fuels over a wide range of compression ratios and inlet-air temperatures. The significance of the term "temperature sensitivity" is sketched, and it is emphasized that no generalized number such as octane number can be applied even to members of a given class of hydrocarbons when broad ranges of engine severity are encountered
A preliminary investigation of the icing characteristics of a large rectangular-throat pressure-type carburetor by Gilbert E Chapman( Book )

1 edition published in 1946 in English and held by 2 WorldCat member libraries worldwide

A rectangular-throat pressure-type carburetor was investigated to determine the icing characteristics of this part of a large four-engine bomber induction system. Runs of 15-minute duration were made at a simulated low-cruising power condition over a range of carburetor-air temperatures from 12 to 100 degrees F with varied moisture contents to establish the limiting conditions for the formation of visible and serious icing. The investigation included icing tests made with a standard nozzle bar and an impinging-jets nozzle bar
Wartime report( )

in English and held by 2 WorldCat member libraries worldwide

Reproductions of reports, some declassified, of research done at Aircraft Engine Research Laboratory during World War II. The order of reports does not represent when they were chronologically issued. Reference to the original version of each report is included
Cooling of gas turbines by W. Byron Brown( Book )

2 editions published in 1947 in English and held by 1 WorldCat member library worldwide

Cooling of gas turbines by L Wolfenstein( Book )

2 editions published in 1947 in English and held by 1 WorldCat member library worldwide

Calculations of the performance of a compression-ignition engine-compressor turbine combination by Alexander Mendelson( Book )

2 editions published in 1947 in English and held by 1 WorldCat member library worldwide

Jet diffuser for simulating ram-pressure and altitude conditions on a turbojet-engine static test stand by Robert H Essig( Book )

2 editions published in 1947 in English and held by 1 WorldCat member library worldwide

This report presents an investigation of a jet diffuser designed to utilize kinetic energy of the jet from a turbojet engine to reduce discharge pressure at the exhaust nozzle and thereby provide simulated ram-pressure ratios across the engine. The range of engine operating conditions obtainable with the jet diffuser are shown at several ram-pressure ratios
Cooling of gas turbines by L Wolfenstein( Book )

2 editions published in 1947 in English and held by 1 WorldCat member library worldwide

 
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English (30)