Application of the ONERA Model of Dynamic Stall

Application of the ONERA Model of Dynamic Stall PDF Author: Kenneth W. McAlister
Publisher:
ISBN:
Category : Rotors (Helicopters)
Languages : en
Pages : 72

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Book Description

Application of the ONERA Model of Dynamic Stall

Application of the ONERA Model of Dynamic Stall PDF Author: Kenneth W. McAlister
Publisher:
ISBN:
Category : Rotors (Helicopters)
Languages : en
Pages : 72

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Book Description


Application of the ONERA Model of Dynamic Stall

Application of the ONERA Model of Dynamic Stall PDF Author: Kenneth W. McAlister
Publisher:
ISBN:
Category : Rotors (Helicopters)
Languages : en
Pages : 72

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Book Description


Application of the ONERA (Office National D'Etudes Et de Recherches Aerospatiales) Model of Dynamic Stall

Application of the ONERA (Office National D'Etudes Et de Recherches Aerospatiales) Model of Dynamic Stall PDF Author: K. W. McAlister
Publisher:
ISBN:
Category :
Languages : en
Pages : 65

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Book Description
A semiempirical model, developed at the Office National D'Etudes et de Recherches Aerospatiales to predict the unsteady loads on an airfoil that is experiencing dynamic stall, is investigated. This study describes the math model from an engineering point of view, demonstrates the procedure for obtaining various empirical parameters, and compares the loads predicted by the model with those obtained in the experiment. The procedure is found to be straightforward, and the final calculations and measurements also indicate that a decrease in accuracy results when the values of both the reduced frequency and the amplitude of oscillation are large. Potential quantitative improvements in the accuracy of the calculations are discussed in terms of accounting for both the hysteresis in the static data and the effects of stall delay in the governing equations. (Author).

Three Interpretations of the Onera Dynamic-stall Model with Applications to Rotor Blade Flapping Response

Three Interpretations of the Onera Dynamic-stall Model with Applications to Rotor Blade Flapping Response PDF Author: Daniel J. Rudy
Publisher:
ISBN:
Category : Helicopters
Languages : en
Pages : 128

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A Comparative Study of Some Dynamic Stall Models

A Comparative Study of Some Dynamic Stall Models PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 82

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The Phenomenon of Dynamic Stall

The Phenomenon of Dynamic Stall PDF Author: W. J. McCroskey
Publisher:
ISBN:
Category :
Languages : en
Pages : 38

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Book Description
Stall and its consequences are fundamentally important to the design and operation of flight vehicles. A certain degree of unsteadiness always accompanies the flow over an airfoil or other streamlined body at high angle of attack, but the stall of a lifting surface undergoing unsteady motion is even more complex than static stall. Dynamic stall remains a major unsolved problem with a variety of current applications in aeronautics, hydrodynamics, and wind engineering. This report summarizes the main physical features of the phenomenon and the attempts that have been made to predict it. The information presented is drawn mainly from recent review articles and investigations by the author and his colleagues. Since a large fraction of the existing knowledge has come from experimental research, the details of dynamic stall are discussed principally in physical terms.

IUTAM Symposium on New Applications of Nonlinear and Chaotic Dynamics in Mechanics

IUTAM Symposium on New Applications of Nonlinear and Chaotic Dynamics in Mechanics PDF Author: Francis C. Moon
Publisher: Springer Science & Business Media
ISBN: 9401153205
Category : Technology & Engineering
Languages : en
Pages : 559

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Book Description
This book presents the latest research results in the area of applied nonlinear dynamics and chaos theory. Papers by three academic generations address new applications of nonlinear dynamics to mechanics, including fluid-structure interaction, machining and mechanics of solids, and many other applications.

Principles of Helicopter Aerodynamics

Principles of Helicopter Aerodynamics PDF Author: J. Gordon Leishman
Publisher: Cambridge University Press
ISBN: 9780521523967
Category : Medical
Languages : en
Pages : 544

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Book Description
Helicopters are highly capable and useful rotating-wing aircraft with roles that encompass a variety of civilian and military applications. Their usefulness lies in their unique ability to take off and land vertically, to hover stationary relative to the ground, and to fly forward, backward, or sideways. These unique flying qualities, however, come at a high cost including complex aerodynamic problems, significant vibrations, high levels of noise, and relatively large power requirements compared to fixed-wing aircraft. This book, written by an internationally recognized expert, provides a thorough, modern treatment of the aerodynamic principles of helicopters and other rotating-wing vertical lift aircraft. Every chapter is extensively illustrated and concludes with a bibliography and homework problems. Advanced undergraduate and graduate students, practising engineers, and researchers will welcome this thorough and up-to-date text on rotating-wing aerodynamics.

NASA Technical Paper

NASA Technical Paper PDF Author:
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 218

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Book Description


Introduction to Nonlinear Aeroelasticity

Introduction to Nonlinear Aeroelasticity PDF Author: Grigorios Dimitriadis
Publisher: John Wiley & Sons
ISBN: 1118613473
Category : Technology & Engineering
Languages : en
Pages : 597

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Book Description
Introduces the latest developments and technologies in the area of nonlinear aeroelasticity Nonlinear aeroelasticity has become an increasingly popular research area in recent years. There have been many driving forces behind this development, increasingly flexible structures, nonlinear control laws, materials with nonlinear characteristics, etc. Introduction to Nonlinear Aeroelasticity covers the theoretical basics in nonlinear aeroelasticity and applies the theory to practical problems. As nonlinear aeroelasticity is a combined topic, necessitating expertise from different areas, the book introduces methodologies from a variety of disciplines such as nonlinear dynamics, bifurcation analysis, unsteady aerodynamics, non-smooth systems and others. The emphasis throughout is on the practical application of the theories and methods, so as to enable the reader to apply their newly acquired knowledge. Key features: Covers the major topics in nonlinear aeroelasticity, from the galloping of cables to supersonic panel flutter. Discusses nonlinear dynamics, bifurcation analysis, numerical continuation, unsteady aerodynamics and non-smooth systems. Considers the practical application of the theories and methods. Covers nonlinear dynamics, bifurcation analysis and numerical methods. Accompanied by a website hosting Matlab code. Introduction to Nonlinear Aeroelasticity is a comprehensive reference for researchers and workers in industry and is also a useful introduction to the subject for graduate and undergraduate students across engineering disciplines.