Results 221 to 230 of about 29,955 (275)

Fan Noise from Turbofan Engines

Journal of Aircraft, 1976
This paper reviews turbomachinery noise from turbofan engines as typified by fan noise. The mechanisms and theories of fan noise are reviewed and concepts for its reduction, including acoustic suppression, are discussed. Correlations of the overall noise data from several full-scale fans tested at NASA Lewis Research Center are presented as indicative ...
Charles E. Feiler, E. William Conrad
openaire   +1 more source

Ice crystal ingestion by turbofans

2021
This Thesis will present the problem of inflight icing in general and inflight icing caused by the ingestion of high altitude ice crystals produced by high energy mesoscale convective complexes in particular, and propose a new device to prevent it based on dielectric barrier discharge plasma. Inflight icing is known to be the cause of 583 air accidents
Manuel A. Ríos Pabón, Young I. Cho
openaire   +1 more source

Compound cycle turbofan engine

19th Joint Propulsion Conference, 1983
The paper discusses the design and development of critical technologies for a "near-adiabatic" compound cycle turbofan engine (CCTE). The concept involves replacing the combustor of a conventional turbofan engine with a highly supercharged, high-speed, two-stroke, direct-injected diesel core. Primary emphasis was on reducing specific fuel consumption t
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Digital Control Brings Large Turbofan Benefits to the Regional Jetliner Turbofan Market

Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; General, 1994
In keeping with the general industry trend of applying Full Authority Digital Electronic Control (FADEC) technology to small gas turbine engines, Textron Lycoming and Chandler Evans Division of Coltec Industries have developed and qualified a single channel control system for use on the Textron Lycoming LF507-1F turbofan engine.
Patterson B. Sisson, David K. Faymon
openaire   +1 more source

Distributed Control of Turbofan Engines

45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2009
Abstract : The purpose of this paper is to develop control theoretic concepts for distributed control of gas turbine engines, and develop a dynamic engine model incorporating distributed components in compressor dynamics, engine cycles, and engine control.
Mehrdad Pakmehr, Marion Mounier, Nathan Fitzgerald, George Kiwada, James Paduano, Eric Feron, Alireza Behbahani   +6 more
openaire   +1 more source

Continual Learning of Fault Prediction for Turbofan Engines using Deep Learning with Elastic Weight Consolidation

IEEE International Conference on Emerging Technologies and Factory Automation, 2020
Fault prediction based upon deep learning algorithms has great potential in industrial automation: By automatically adapting to different usage contexts, it would greatly expand the usefulness of current predictive maintenance solutions.
Benjamin Maschler, Hannes Vietz, Nasser Jazdi, M. Weyrich   +3 more
semanticscholar   +1 more source

Spatial Correlation and Temporal Attention-based LSTM for Remaining Useful Life Prediction of Turbofan Engine

Measurement, 2023
Huixin Tian, Linzheng Yang, Bingtian Ju
semanticscholar   +1 more source

Gross thrust coefficient - Turbofan engines

Journal of Aircraft, 1969
QL = CS(h ± X6 (2) The plenum pneumatic capacitances are based on isentropic compressibility. The pressure rates associated with the inner circular skirt plenums and the inskirt plenum, which lies between the inner circular skirts and the outer peripheral skirt, vary with vehicle motion in pitch and heave where dP/dt = (kP/V)[2Q + A(dZ/dt ± xd8/dt)] (3)
openaire   +1 more source

Modified Brayton Cycle for Turbofans

Volume 2: Combustion, Fuels, and Emissions; Renewable Energy: Solar and Wind; Inlets and Exhausts; Emerging Technologies: Hybrid Electric Propulsion and Alternate Power Generation; GT Operation and Maintenance; Materials and Manufacturing (Including Coatings, Composites, CMCs, Additive Manufacturing); Analytics and Digital Solutions for Gas Turbines/Rotating Machinery, 2019
Abstract In the present study, a design point analysis of twin-spool turbofan engines is carried out, considering fuel injection of Aviation Turbine Fuel (ATF) in the initial stages of the compressor instead of combustor The two-phase compression brings about intercooling in the modified Brayton cycle, by injecting the atomized fuel ...
Chirag Singhal, Sameer Hasan, M. F. Baig
openaire   +1 more source

Wear Prognostic on Turbofan Engines

Annual Conference of the PHM Society, 2013
One of the most evident characteristic of wear for a turbofan engine is the exhaust gas temperature (EGT). It seems clear that this temperature increases when some carbon deposits on the turbine, when the compressor efficiency diminishes so the fuel flow should increase to produce the same amount of thrust, or even when some ...
Jérôme Lacaille, Aurélie Gouby, Olivier Piol   +2 more
openaire   +1 more source