Author: O.A. St. Hilaire
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Author: A. O. St. Hilaire
Publisher:
ISBN:
Category :
Languages : en
Pages : 110

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The objective of the present investigation was to study the unsteady chordwise force response on the airfoil surface and to examine its sensitivity to the various system parameters. A further examination of previously reported unsteady aerodynamic data on a tunnel spanning with (both swept and unswept), obtained in the United Technologies Research (UTRC) Main Wind Tunnel, was performed. The main body of this data analysis was carried out by analyzing the propagation speed of pressure disturbances along the chord and by studying the behavior of the unsteady part of the chordwise pressure distribution at various points of the airfoil pitching cycle. It was found that Mach number effects dominate the approach to and the inception of both static and dynamic stall. The stall angle decreases as the Mach number increases. However, sweep dominates the load behavior within the stall regime. Large phase differences between unswept and swept responses, that do not exist at low lift coefficient, appear once the stall boundary has been penetrated. It was also found that reduced frequency is not a reliable indicator of the unsteady aerodynamic response in the high angle of attack regime. (Author).

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 330

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Author: A. O. St. Hilaire
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 106

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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 1368

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Author: Gordon J. Leishman
Publisher: Cambridge University Press
ISBN: 9780521858601
Category : Science
Languages : en
Pages : 860

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Book Description
Written by an internationally recognized teacher and researcher, this book provides a thorough, modern treatment of the aerodynamic principles of helicopters and other rotating-wing vertical lift aircraft such as tilt rotors and autogiros. The text begins with a unique technical history of helicopter flight, and then covers basic methods of rotor aerodynamic analysis, and related issues associated with the performance of the helicopter and its aerodynamic design. It goes on to cover more advanced topics in helicopter aerodynamics, including airfoil flows, unsteady aerodynamics, dynamic stall, and rotor wakes, and rotor-airframe aerodynamic interactions, with final chapters on autogiros and advanced methods of helicopter aerodynamic analysis. Extensively illustrated throughout, each chapter includes a set of homework problems. Advanced undergraduate and graduate students, practising engineers, and researchers will welcome this thoroughly revised and updated text on rotating-wing aerodynamics.

Author: Gordon C. Oates
Publisher: AIAA (American Institute of Aeronautics & Astronautics)
ISBN:
Category : Science
Languages : en
Pages : 544

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Book Description
Annotation The last of three texts on aircraft propulsion technology planned by Gordon C. Oates. Other titles: Aerodynamics of gas turbine and rocket propulsion (1988); Aerothermodynamics of aircraft engine components (1985). Chapters treat combustion technology, engine/airplane performance matching, inlets and inlet/engine integration, variable convergent/divergent nozzle aerodynamics, engine instability, aeroelasticity, and unsteady aerodynamics. Annotation(c) 2003 Book News, Inc., Portland, OR (booknews.com)

Author:
Publisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 684

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Author:
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ISBN:
Category : Helicopters
Languages : en
Pages : 412

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 394

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