WorldCat Identities

Aircraft Engine Research Laboratory

Overview
Works: 296 works in 341 publications in 1 language and 400 library holdings
Publication Timeline
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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
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 )

2 editions 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
Knock-limited performance tests of 2,2,3,4-tetramethylpentane, 2,3,3,4-tetramethylpentane, 3,4,4-trimethyl-2-pentene, and 2,3,4-trimethyl-2-pentene in small-scale and full-scale cylinders by Edmund R Jonash( Book )

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

Knock-limited tests were conducted with F-4, F-3, and 17.6 small-scale engines and with a full-scale cylinder on blends containing the following purified hydrocarbons: 2,2,3,4-tetramethylpentane, 2,3,3,4-tetramethylpentane, 3,4,4-trimethyl-2-pentene, and 2,3,4-trimethyl-2-pentene
Performance of NACA eight-stage axial-flow compressor at simulated altitude by J. Austin King( Book )

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

An investigation has been conducted by the NACA to determine the design-performance characteristics of the NACA eight-stage axial-flow compressor and the effect of altitude on the performance. The compressor was tested at simulated altitudes of 50,000; 36,000; and 27,000 feet at rotor speeds corresponding to compressor Mach numbers of 0.80, 0.85, 0.90, and 0.95 wit varying air flow at each speed
Cooling of gas turbines by W. Byron Brown( Book )

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

Knocking tendency of an air-cooled aircraft-engine cylinder with one and with two spark plugs by R. C Spencer( Book )

2 editions 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
Performance effect of fully shrouding a centrifugal supercharger impeller by William K Ritter( Book )

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

A program of tests was conducted to determine the effect of an integral front shroud on the performance characteristics of a centrifugal supercharger impeller. The impellers tested were a modification of a commercial semishrouded impeller and a fully shrouded impeller, which was the same as the semishrouded one except for an integral front shroud. There were conducted in a variable component test setup in conjunction with a vaneless diffuser of NACA design at impeller tip speeds from 800 to 1200 feet per second
The NACA balanced-diaphragm dynamometer-torque indicator by Charles S Moore( Book )

2 editions 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
Operating temperatures of a sodium-cooled exhaust valve as measured by a thermocouple by Julio Sanders( Book )

2 editions 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
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. Pressure-time recoreds obtained show that injection of water at 60° B.T.C. on the compression stroke at a water-fuel ratio of 0.3 rendered M-3 fuel as good as S-3 fuel from an antiknock consideration. The optimum crank angle for injection of water into the end zone was found to be critical. As the injection angle was increased beyond the optimum, the quantity of water required to suppress knock increased to 3.6 water-fuel ratio at 132° B.T.C. The water quantity could not be increased beyond 3.6 water-fuel ration because of injection-pump limitations; however, a further increase in the injection angle up to the earliest angle obtainable, which was 20° A.T.C. on the intake stroke, continuously increased the knock intensity. The engine operating conditions of the tests did not simulate those encountered in flight, especially with regard to the operating speed of 570 rpm. For this reason the results should only be regarded as of theoretical importance until further investigation has been made
Small-orifice tubes for minimizing dilution in exhaust-gas samples by Harvey A Cook( Book )

2 editions 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
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 )

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

2 editions 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
Air-flow and performance characteristics of engine-stage supercharger of a double-row radial aircraft engine. 2 - Effect of design variables by Edmund J Baas( Book )

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

An investigation has been conducted to determine the effect of the location of the diffuser vanes with respect to the supercharger outlets and the effect of flow conditions at the impeller inlet on the air-flow distribution in the outlets of the engine-state supercharger of an 18-cylinder double-row radial aircraft engine. The standard 13-vane diffuser rotated 180 degrees from its original position and an NACA designed 18-vane diffuser were used to determine the effect of the diffuser-vane location with respect to the supercharger outlets. The 18 vanes of the diffuser correspond to the 18 outlets of the supercharger. The effect of flow conditions at the impeller inlet was investigated by distorting the flow at the inlet and noting the effect in the supercharger outlets. An NACA vaneless diffuser was used in this investigation to eliminate the diffuser-vane effect
The knock-limited performance of fuel blends containing aromatics. 5 - n-propylbenzene, n-butylbenzene, isobutylbenzene, m-xylene, and 1-isopropyl-4-methylbenzene by Carl L Meyer( Book )

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

Results are reported of knock-limited tests of five aromatics, each individually blended with selected base fuels and tested with and without TEL, using 17.6, F-4, and F-3 small-scale engines. The five aromatics rated in the following order of decreasing antiknock effectiveness at fuel/air ratio 0.10: m-xylene, 1-isopropyl-4-methylbenzene, n-propylbenzene, isobutylbenzene, and n-butylbenzene
Relation between spark-ignition engine knock, detonation waves, and autoignition as shown by high-speed photography by Cearcy D Miller( Book )

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

A critical review of literature bearing on the autoignition and detonation-wave theories of spark-ignition engine knock and on the nature of gas vibrations associated with combustion and knock results in the conclusion that neither the autoignition theory nor the detonation-wave theory is an adequate explanation of spark-ignition engine knock. A knock theory is proposed, combining the autoignition and detonation-wave theories, introducing the idea that the detonation wave develops in autoignited or afterburning gases, and ascribing comparatively low-pitched heavy knocks to autoignition but high-pitched pinging knocks to detonation waves with the possibility of combinations of the two types of knock
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 )

2 editions 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
Principles and methods of rating and testing centrifugal superchargers by Herman H Ellerbrock( Book )

2 editions published in 1942 in English and held by 2 WorldCat member libraries worldwide

A discussion of the general principles involved in the rating and testing of centrifugal superchargers, a statement and discussion of present standard methods in rating and testing, and reasons for the adoption of these standards are given
A preliminary investigation of the icing characteristics of a large rectangular-throat pressure-type carburetor by Gilbert E Chapman( Book )

2 editions 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
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 (42)