Results 211 to 220 of about 29,955 (275)
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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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Advanced Courses
The new generation of Ultra-High-By-Pass-Ratio (UHBR) turbofan engine while considerably reducing fuel consumption, threatens higher noise levels at low frequencies because of its larger diameter, lower number of blades and rotational speed.
E. de Bono +7 more
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The new generation of Ultra-High-By-Pass-Ratio (UHBR) turbofan engine while considerably reducing fuel consumption, threatens higher noise levels at low frequencies because of its larger diameter, lower number of blades and rotational speed.
E. de Bono +7 more
semanticscholar +1 more source
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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AIAA AVIATION FORUM AND ASCEND 2024
Hybrid Electric Propulsion (HEP) has garnered significant attention as part of the initiative to decarbonize the aviation industry by 2050. However, the ongoing development of the electrical components poses technological challenges, making the ...
Tavish Pattanayak +5 more
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Hybrid Electric Propulsion (HEP) has garnered significant attention as part of the initiative to decarbonize the aviation industry by 2050. However, the ongoing development of the electrical components poses technological challenges, making the ...
Tavish Pattanayak +5 more
semanticscholar +1 more source
IEEE Transactions on Industrial Informatics, 2021
In this article, a novel adaptive dynamic programming (ADP) approach is proposed for the optimal control problem of nonlinear continuous control systems with unknown dynamics.
Tao Sun, Ximing Sun
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In this article, a novel adaptive dynamic programming (ADP) approach is proposed for the optimal control problem of nonlinear continuous control systems with unknown dynamics.
Tao Sun, Ximing Sun
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Multiobjective Optimization for Turbofan Engine Using Gradient-Free Method
IEEE Transactions on Systems, Man, and Cybernetics: SystemsTurbofan engine performance optimization is usually formulated as a single objective, closed-form optimization problem by employing a prior mechanism model with an additive, user-preference weight. However, in practical scenarios, the conventional single
Ran Chen +3 more
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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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