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Far-field calculations for turbofan noise
AIAA Journal, 2001The development of variable-order mapped infinite wave envelope elements for finite element modeling of acoustic radiation from turbofan nacelles is reviewed. These elements can be used outside of the near field as a nonreflecting boundary condition and as a finite-dimensional discretization of the infinite exterior domain for calculation of far-field ...
Indranil Danda Roy, Walter Eversman
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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, 1994In 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
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Design and verification of a turbofan swirl augmentor
14th Joint Propulsion Conference, 1978The paper discusses the details of the design and verification testing of a full-scale turbofan 'swirl' augmentor at sea level and altitude. No flameholders are required in the swirl augmentor since the radial motion of the hot pilot gases and subsequent combustion products provides a continuous ignition front across the stream.
William J. Egan, James H. Shadowen
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Aircraft Engineering and Aerospace Technology, 1993
A recent two‐line news item in the International Herald Tribune highlighted an important aspect of Russia's interest in developing cryogenic‐fuelled aircraft. The item read simply “The airport in Vladivostok, in far eastern Russia, closed down on Tuesday because it had run out of fuel.” The air routes to Vladivostok from Moscow and other major Russian ...
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A recent two‐line news item in the International Herald Tribune highlighted an important aspect of Russia's interest in developing cryogenic‐fuelled aircraft. The item read simply “The airport in Vladivostok, in far eastern Russia, closed down on Tuesday because it had run out of fuel.” The air routes to Vladivostok from Moscow and other major Russian ...
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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, 2019Abstract 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
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Volume 1: Turbo Expo 2005, 2005
Smaller smarter un-manned air vehicles (UAV’s) and missiles are being proposed and developed to function in a variety of roles previously performed by larger manned aircraft and limited range missiles. The endurance and stealth demanded of such advanced vehicles requires small turbofan engines possessing relatively higher power density combined with ...
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Smaller smarter un-manned air vehicles (UAV’s) and missiles are being proposed and developed to function in a variety of roles previously performed by larger manned aircraft and limited range missiles. The endurance and stealth demanded of such advanced vehicles requires small turbofan engines possessing relatively higher power density combined with ...
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Wear Prognostic on Turbofan Engines
Annual Conference of the PHM Society, 2013One 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 +2 more
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Robust monitoring of turbofan sensors
2014 IEEE Aerospace Conference, 2014Bench development tests of new turbofan engines make an important use of sensor measurements to help engineers understand the behavior of new components design. Such tests are expensive and may be completely compromised if any measurement is missing.
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2013
This study was conducted to investigate the effect of a variable bypass on the operation and performance of a turbofan engine. The goal was to establish the viability of such an engine, in the context of being able to provide an aircraft, so equipped, with variable performance that could be altered to suit different operational scenarios.
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This study was conducted to investigate the effect of a variable bypass on the operation and performance of a turbofan engine. The goal was to establish the viability of such an engine, in the context of being able to provide an aircraft, so equipped, with variable performance that could be altered to suit different operational scenarios.
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Development and progress in aeroacoustic noise reduction on turbofan aeroengines
Progress in Aerospace Sciences, 2022Dan Zhao, Xiaofeng Sun, Sid Becker
exaly