Measurement automation for small jet engine testing

This article presents a review about the jet engine testing facilities of the Naval Air Warfare Center Aircraft Division in Trenton, NJ, that had to be moved to a base run by another branch of the military, the Arnold Engineering Development Center at Arnold Air Force Base in Tennessee. The jet engine testing complex at Trenton had been built in the 1950s. The restriction effectively ruled out any upgrades so long as the Navy’s engine test requirements could be met by replicating the capabilities of the old facility. The natural tendency of the engineers and planners looking at the project was to think immediately about how the facility could be improved with modern designs. For the restriction on not improving the test capability at Trenton, the project ironically provided an expansion of services. This is built to subject the Navy engines to definite environmental conditions, and as long as the Navy has that kind of test requirement. It is a capability that is available not only to the Navy and Air Force, but to the Army, Marines, and private industry as well.

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Correlations of Soot Formation in Turbojet Engines and in Laboratory Flames

Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations ◽

10.1115/84-gt-108 ◽

1984 ◽

Cited By ~ 1

Author(s):

R. J. Gill ◽

D. B. Olson ◽

H. F. Calcote

Keyword(s):

Soot Formation ◽

Dominant Role ◽

Engine Performance ◽

Smoke Point ◽

Jet Engines ◽

Fuel Property ◽

Jet Engine ◽

Related Data ◽

Polycyclic Aromatic ◽

Engine Testing

Smoke related performance of both jet engine and research combustors has been correlated with several fuel properties. The smoke related data included: smoke number, liner temperature rise, and radiation flux to the combustor wall; fuel parameters included: percent hydrogen, percent aromatic, percent polycyclic aromatic, smoke point, and the threshold soot index, TSI. The research combustor results correlated best with the threshold sooting index. While some correlations with engine performance were excellent, no single fuel property was generally useful in evaluating smoke related performance, mainly because of insufficient data on the fuels tested in the jet engine programs, e.g., percent aromatics specifies a class of fuels which span > 50% of the possible range of sooting tendencies. It is, however, demonstrated that fuel composition plays a dominant role in determining smoke related engine parameters. It is recommended that fuels used for engine testing programs be chemically analyzed in greater detail or be made available for laboratory measurements of soot thresholds and soot yields until a sufficient data base is available to establish a laboratory technique of predicting relative smoke related performance of fuels in jet engines.

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Fiber Optics Based Jet Engine Augmenter Viewing System

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.3240252 ◽

1989 ◽

Vol 111 (2) ◽

pp. 306-309

Author(s):

P. J. Murphy ◽

D. W. Jones ◽

A. E. Lennert ◽

R. R. Jones

Keyword(s):

High Temperature ◽

Fiber Optics ◽

Fiber Optic ◽

Video Camera ◽

Jet Engine ◽

Front End ◽

Lens Assembly ◽

Color Video ◽

Engine Testing ◽

Optic Array

An augmenter viewing system employing a coherent fiber-optic array was developed for use in jet engine testing applications at AEDC. Real-time viewing of the test article afterburner was obtained in a severe environment under high temperature and vibration levels. The optical system consisted of a conventional front-end lens assembly coupled with the fiber-optic array, and a solid-state color video camera mounted inside the test cell. The advantages and problems associated with a fiber-optics-based viewing system will be discussed in comparison with more conventional viewing techniques for this application.

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Quieting of the Jet Engine Testing Facilities in the Willgoos Turbine Laboratory

The Journal of the Acoustical Society of America ◽

10.1121/1.1917430 ◽

1952 ◽

Vol 24 (1) ◽

pp. 116-116

Author(s):

S. M. Potter ◽

H. C. Hardy

Keyword(s):

Jet Engine ◽

Engine Testing

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Influence of Bioethanol Blends on Performances of a Micro Turbojet Engine

Revista de Chimie ◽

10.37358/rc.20.5.8131 ◽

2020 ◽

Vol 71 (5) ◽

pp. 229-238

Author(s):

Grigore Cican ◽

Marius Deaconu ◽

Radu Mirea ◽

Andrei Tiberiu Cucuruz

Keyword(s):

Engine Speed ◽

Volumetric Flow Rate ◽

Turbine Engines ◽

Maximum Speed ◽

Automation System ◽

Fuel Blend ◽

Jet Engine ◽

Engine Testing ◽

Engine Components ◽

Operating Regimes

This paper proposes a study regarding the use of bioethanol as fuel for turbine engines used in aviation. For this purpose, three blends of 5, 10, and 15% concentrations of bioethanol mixed with Jet A fuel were tested on JET CAT P80 microturbo engine. During the engine testing, the following parameters were monitored: engine speed, generated force, temperature in front of the turbine, fuel volumetric flow rate, and vibration levels measured both on axial and radial direction. The tests were performed by maintaining the microturbo engine for about 1 min at three operating regimes: idle, cruise, and maximum speed. In addition, a comparative analysis between fuels for a test with the microturbo engine from the idle position to maximum position is presented. After the tests were conducted, a jet engine cycle analysis was performed at the max regime and the fuel specific consumption, the efficiency of the combustion chamber, and the thermal efficiency of the engine for each fuel blend were calculated. The tests were made without making any modifications to the engine components or automation system.

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Jet Engine Test System Including Expert System for Diagnosis

Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery ◽

10.1115/91-gt-408 ◽

1991 ◽

Author(s):

K. Suzuki ◽

K. Umene ◽

H. Ishizawa

Keyword(s):

Expert System ◽

High Speed ◽

Diagnostic Procedures ◽

Test System ◽

Test Equipment ◽

Engine Control ◽

Engine Test ◽

Jet Engine ◽

Engine Testing ◽

And Performance

A jet engine test run system has been developed which enables automatic engine testing ( functional and performance checks, including engine control trims ). This system includes an expert system for diagnostic procedures which are the result of proper judgements based on experience and knowledge and high speed processing. In this paper, we describe the construction and an application of the jet engine test equipment and the expert system for jet engine diagnostics.

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