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Analysis of Low-Speed Unsteady Airfoil Flows

Autor Tuncer Cebeci, Max Platzer, Hsun Chen, Kuo-cheng Chang, Jian P. Shao
en Limba Engleză Mixed media product – 18 feb 2005
The standard textbooks on aerodynamics usually omit any discussion of un­ steady aerodynamics or, at most, consider it only in a single chapter, based on two justifications. The first is that unsteady aerodynamics should be regarded as a specialized subject required "only" in connection with understanding and an­ alyzing aeroelastic phenomena such as flutter and gust response, and therefore should be dealt with in related specialist books. The second reason appears to be reluctance to discuss aerodynamics with the inclusion of the time-dependent terms in the conservation equations and the boundary conditions for fear that added complications may discourage the reader. We take the opposite view in this book and argue that a full understanding of the physics of lift generation is possible only by considering the unsteady aerody­ namics of the starting vortex generation process. Furthermore, certain "steady" flows are inherently unsteady in the presence of flow separation, as for example the unsteady flow caused by the Karman vortex shedding downstream of a cylin­ der and "static" airfoil stall which is an inherently unsteady flow phenomenon. Therefore, it stands to reason that a unified treatment of aerodynamics that yields steady-state aerodynamics as a special case offers advantages. This rea­ soning is strengthened by the developments in computational fluid dynamics over the past forty years, which showed that accurate steady-state solutions can be obtained efficiently by solving the unsteady flow equations.
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Specificații

ISBN-13: 9783540229322
ISBN-10: 3540229329
Pagini: 230
Ilustrații: XII, 226 p. With CD-ROM.
Dimensiuni: 170 x 244 x 20 mm
Greutate: 0.58 kg
Ediția:2005
Editura: Springer Berlin, Heidelberg
Colecția Springer
Locul publicării:Berlin, Heidelberg, Germany

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Research

Cuprins

Physics of Unsteady Flows.- The Differential Equations of Fluid Flow.- Panel Methods.- Applications of Panel Method.- Boundary-Layer Methods.- Applications of Boundary-Layer Methods: Flows Without Separation.- Applications of Boundary-Layer Methods: Flows with Separation.- Navier-Stokes Methods.- Applications of Navier-Stokes Methods.- Companion Computer Programs.

Textul de pe ultima copertă

This book provides an introduction to unsteady aerodynamics with emphasis on the analysis and computation of inviscid and viscous two-dimensional flows over airfoils at low speeds. It begins with a discussion of the physics of unsteady flows and an explanation of lift and thrust generation, airfoil flutter, gust response and dynamic stall. This is followed by an exposition of the four major calculation methods in currents use, namely inviscid-panel, boundary-layer, viscous-inviscid interaction and Navier-Stokes methods. Undergraduate and graduate students, teachers, scientists and engineers concerned with aeronautical, hydronautical and mechanical engineering problems will gain understanding of the physics of unsteady low-speed flows and an ability to analyze these flows with modern computational methods.