Fuel Problems With Marine Gas Turbine Engines

1967 ◽  
Author(s):  
J. P. Attiani
Keyword(s):  
Gas Turbine ◽  
Laboratory Tests ◽  
Operating Experience ◽  
Fuel Oil ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Test Program ◽  
Copper Deposits ◽  
Remedial Actions ◽  
Effect Of Copper

This paper describes a test program undertaken by the Navy to determine the causes of two problems in the fuel-oil systems of gas turbine engines. The first problem concerns short filter life; the second, copper deposits that cause clogging of fuel-oil nozzles. Results are given for operating experience with va-ious filter units from both laboratory tests and fleet experience. The effect of copper deposits on thermal stability is discussed. The author concludes with a review of remedial actions being taken to solve these problems.

The Potential Impact of Future Fuels on Small Gas Turbine Engines

1982 ◽  
Author(s):  
J. A. Saintsbury ◽  
P. Sampath
Keyword(s):  
Gas Turbine ◽  
Operating Experience ◽  
Gas Turbine Engine ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Turbine Engine ◽  
The Future ◽  
Potential Impact ◽  
The Impact ◽  
Whitney Aircraft

The impact of potential aviation gas turbine fuels available in the near to midterm, is reviewed with particular reference to the small aviation gas turbine engine. The future course of gas turbine combustion R&D, and the probable need for compromise in fuels and engine technology, is also discussed. Operating experience to date on Pratt & Whitney Aircraft of Canada PT6 engines, with fuels not currently considered of aviation quality, is reported.

scholarly journals Approaches to the Prevaporized-Premixed Combustor Concept for Gas Turbines

1975 ◽  
Author(s):  
L. J. Spadaccini ◽  
E. J. Szetela
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Bluff Body ◽  
Porous Plate ◽  
Operating Conditions ◽  
Fuel Oil ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Operational Conditions ◽  
Lean Combustion

An experimental investigation was performed to evaluate a combustor concept which is applicable to gas turbine engines and is believed to offer valuable pollution control advantages relative to the conventional liquid-fuel-spray approach. It involves fuel prevaporization, premixing and lean combustion and may be applied to the design of combustors for aircraft, industrial or automotive powerplants. Two types of bluff-body flameholders, viz. porous-plate and drilled-plate, were evaluated for use as flame stabilizers within the combustor. Tests were conducted under sets of steady-state operational conditions corresponding, respectively, to applications in a low-pressure regenerative-cycle and high-pressure nonregenerative-cycle automobile gas turbine engines. The data acquired can be used to design gas turbine combustors having predicted performance characteristics which are better than those required to meet the most stringent automobile emissions regulations of the Federal “Clean Air Act.” Fuel prevaporization can be accomplished either externally, prior to admission into the engine airstream, or internally by the airstream itself. In support of the prevaporization concept, the feasibility of vaporizing No 2 fuel oil in a heat exchanger which is external to the engine was investigated. Tests conducted at representative operating conditions indicated that a deposit of 0.01 0-in. thickness was collected on the vaporizer wall after 50 hr of operation. A much shorter period of cleaning with hot air was sufficient to remove the deposit.

Experimental industrial ion-plasma plants MESh-50 and MAP-R for applying protective coatings on transport and power gas turbine components

2021 ◽  
Author(s):  
S.A. Budinovskiy ◽  
A.A. Lyapin ◽  
A.S. Benklyan
Keyword(s):  
Gas Turbine ◽  
Protective Coatings ◽  
Operating Experience ◽  
Plasma Coating ◽  
Vacuum Arc ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Serial Production ◽  
Ion Plasma

The paper considers selected features of the protective ion-plasma coating deposition onto large-sized gas turbine components using vacuum-arc method by means of the MESh-50 and MAP-R pilot plants. The units have been developed based on the long-term operating experience of MAP-1 (MAP-1M) serial production. These plants are widely used in Russian and international aircraft-building complexes enabling all basic ion-plasma technological processes using standard cathodes made of nickel, cobalt, aluminum alloys and pure metals (Cu, Ti, Cr, Zr, etc.). The increased dimensions of the deposition chamber and the simultaneous use of several evaporators with pipe cathodes 180 mm in diameter and 540 mm high make it possible to apply coatings to large-sized components of gas turbine engines and plants, including such complex parts as “blisk” and “blink”.

Oxidation Behavior of Wrought Gamma-Prime Strengthened Alloys

2008 ◽  
Vol 595-598 ◽  
pp. 661-671 ◽  
Author(s):  
Lee M. Pike ◽  
S.K. Srivastava
Keyword(s):  
Gas Turbine ◽  
Oxidation Behavior ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Test Program ◽  
Gamma Prime ◽  
Static Oxidation ◽  
Dynamic Oxidation ◽  
Oxidation Testing

Oxidation testing of four gamma-prime (γ') strengthened alloys used extensively in aero and/or land-based gas turbine engines was performed. The studied alloys, which included R-41 alloy, Waspaloy alloy, 263 alloy and the new HAYNES® 282® alloy were selected because they belong to a family of alloys distinguished by their possession of sufficient fabricability to be produced in sheet or plate form. The test program included both static and dynamic oxidation testing. The static oxidation tests were performed in flowing air at temperatures of 871, 927 and 982°C (1600, 1700, and 1800°F). The dynamic (burner rig) oxidation tests were performed at 871°C (1600°F). The results of these test programs will be presented.

Observed Rotordynamic Phenomena in Aircraft Gas Turbine Development

2015 ◽  
Author(s):  
Fredric F. Ehrich
Keyword(s):  
Gas Turbine ◽  
High Speed ◽  
Nonlinear Effects ◽  
Aircraft Engine ◽  
Tip Clearance ◽  
Resonant Peak ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Nonlinear Responses ◽  
Remedial Actions

Observations, analysis and understanding of out-of-the-ordinary rotordynamic phenomena (including several instabilities and nonlinear responses) observed in aircraft gas turbine engines and other high-speed rotating machinery over the course of the author’s career in the design and development of aircraft gas turbine engines are described. Some observed phenomena were already widely recognized in the rotordynamic community such as: • Hysteretic whirl • The tip clearance effect on stability of turbomachinery rotors • Instability due to trapped liquids in the rotor • Hysteresis in the resonant peak amplitude • Effective suppression of rotor instability by anisotropy in the engine support structure Other observations were fairly new to the field of rotordynamics at that time they were observed but were identified as being new manifestations of vibration phenomena already familiar to vibration technologists in fields other than high-speed rotordynamics such as: • Sum-and-difference frequency response • Relaxation oscillations • Nonlinear effects of anisotropic clearance in roller and gas bearings At that time these phenomena were observed, the pressure for remediation of the problems they represented in the context of ongoing aircraft engine development resulted in intense attention and analysis which, in turn, often resulted in new insights, useful diagnoses, and effective remedial actions.

Use of Cross Flow Fuel Filtration for Gas Turbine Engines

2007 ◽  
Author(s):  
Chang-Wei Jen ◽  
Walter V. Rauf
Keyword(s):  
Gas Turbine ◽  
Cross Flow ◽  
Poor Quality ◽  
Fuel Oil ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Future Design ◽  
Cross Flow Filtration ◽  
Design Changes ◽  
Flow Filtration

U.S. Navy surface combatants use pre-filters and filter separators in the fuel oil service system to filter out sediment and water in order to meet the fuel oil cleanliness requirements to operate the gas turbine engines and generators. The ships have reported high usage rates of the pre-filters necessitating the replacement of the pre-filter elements. High replacement rates of the elements obviously increases the burden on ships force but it also increases the operating costs due to the cost of the replacement elements and the storage, handling and disposal of the hazardous material generated. One of the causes of the poor quality fuel oil is the purifier’s inability to remove all sediment and water from the fuel oil when transferring fuel from storage to service. A prototype two-stage self-cleaning cross flow filtration unit was installed in parallel with a fuel oil purifier on a surface combatant. This unit was operated during a deployment cycle and had a through put in excess of one million gallons of fuel. The purpose of this paper is to discuss the background leading to the design of the unit, the installation, operation, data, results and future design changes.

scholarly journals Maintenance of Marine Gas Turbine Engines

1970 ◽  
Author(s):  
J. S. Siemietkowski
Keyword(s):  
Power Generation ◽  
Electric Power ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Large Scale ◽  
Operating Experience ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Maintenance Program ◽  
The U.S

Marine gas turbines have been in the U.S. Navy since 1951. At present there are approximately 386 engines including both main propulsion and electric power generation in all types of craft. The maintenance of those engines is performed under a three-level concept, those being organizational, intermediate, overhaul. (Depot.) The lack of a large-scale commitment of gas turbines to the Fleet until mid-year 1969, prevented the establishment of a comprehensive maintenance program. For that reason, manufacturers recommendations rather than firm operating experience, are initially dictating the level of maintenance to be performed at specified intervals.

Gas Screen in Components of Gas Turbine Engines

1997 ◽  
Vol 28 (7-8) ◽  
pp. 536-542
Author(s):  
A. A. Khalatov ◽  
I. S. Varganov
Keyword(s):  
Gas Turbine ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Gas Screen

Potential Application of Composite Materials to Future Gas Turbine Engines

1988 ◽  
Author(s):  
James C. Birdsall ◽  
William J. Davies ◽  
Richard Dixon ◽  
Matthew J. Ivary ◽  
Gary A. Wigell
Keyword(s):  
Composite Materials ◽  
Gas Turbine ◽  
Potential Application ◽  
Turbine Engines ◽  
Gas Turbine Engines
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