Results 181 to 190 of about 17,697 (215)
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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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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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Water-Augmented Turbofan Engine
Journal of Hydronautics, 1968This paper describes a novel lightweight propulsion scheme for use in high-speed ships in which large amounts of water are injected into the fan discharge duct of an aircraft- type turbofan engine. Theoretical design and off-design performance for this water-augmented turbofan engine show that dry thrust theoretically can be augmented 380% at 25 knots ...
W. RICHARD DAVISON, THOMAS J. SADOWSKI
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Aircraft Engineering and Aerospace Technology, 1989
PROGRESS in the development of turbofan engines for civil and military applications has enabled requirements from around 5,000lb to over 70,000lb thrust to be satisfied or anticipated, with prospects for this range to be extended. The three major powerplant manufacturers (Rolls‐Royce, General Electric and Pratt & Whitney) are engaged in fiercely ...
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PROGRESS in the development of turbofan engines for civil and military applications has enabled requirements from around 5,000lb to over 70,000lb thrust to be satisfied or anticipated, with prospects for this range to be extended. The three major powerplant manufacturers (Rolls‐Royce, General Electric and Pratt & Whitney) are engaged in fiercely ...
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SAE Technical Paper Series, 2004
<div class="htmlview paragraph">The highly competitive aerospace industry demands the continuous improvement of aircraft propulsion engines and timely response to new and changing requirements for them. Turbofan engines are a relatively mature and sophisticated technology.
J. H. Brand +3 more
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<div class="htmlview paragraph">The highly competitive aerospace industry demands the continuous improvement of aircraft propulsion engines and timely response to new and changing requirements for them. Turbofan engines are a relatively mature and sophisticated technology.
J. H. Brand +3 more
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Thermodynamic Analysis of Turbofan Engine
Volume 1: Turbo Expo 2005, 2005The present work deals with a detailed parametric thermodynamic analysis of all the possible configurations of turbofan engine (two and three spool with or without mixer and/ afterburner) employing transpiration cooling technique for turbine blade cooling.
R. Yadav +2 more
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Fan Noise from Turbofan Engines
Journal of Aircraft, 1976This 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
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Ice crystal ingestion by turbofans
2021This 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
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Compound cycle turbofan engine
19th Joint Propulsion Conference, 1983The 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, 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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