A Theoretical and Experimental Study of the Fluid Motion about a Flat Plate Rotated Impulsively from Rest to a Uniform Angular Velocity

A Theoretical and Experimental Study of the Fluid Motion about a Flat Plate Rotated Impulsively from Rest to a Uniform Angular Velocity PDF Author: T. Sarpkaya
Publisher:
ISBN:
Category :
Languages : en
Pages : 28

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Book Description
The report presents the results of an experimental and theoretical investigation of separated unsteady flow about a flat plate (a fin or aileron) rotating impulsively from rest to a uniform angular velocity about an axis along its leading edge in an incompressible fluid otherwise at rest or moving steadily and uniformly about the plate. The results show that the early stages of motion are accompanied by torsional oscillations, the frequency of which is identical with the natural frequency of the submerged system. The initial hydrodynamic torque is determined by the added mass-moment of inertia of the plate. In the oscillatory stage of motion the torque is comprised of an angular-velocity-dependent form-torque and an acceleration-dependent inertial torque. These torque components are interdependent as well as time-dependent. The rotation of the plate in a steady uniform flow gives rise to a hinge moment which is considerably larger than that of a plate held fixed at the same instantaneous angle of incidence. (Author).

A Theoretical and Experimental Study of the Fluid Motion about a Flat Plate Rotated Impulsively from Rest to a Uniform Angular Velocity

A Theoretical and Experimental Study of the Fluid Motion about a Flat Plate Rotated Impulsively from Rest to a Uniform Angular Velocity PDF Author: T. Sarpkaya
Publisher:
ISBN:
Category :
Languages : en
Pages : 28

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Book Description
The report presents the results of an experimental and theoretical investigation of separated unsteady flow about a flat plate (a fin or aileron) rotating impulsively from rest to a uniform angular velocity about an axis along its leading edge in an incompressible fluid otherwise at rest or moving steadily and uniformly about the plate. The results show that the early stages of motion are accompanied by torsional oscillations, the frequency of which is identical with the natural frequency of the submerged system. The initial hydrodynamic torque is determined by the added mass-moment of inertia of the plate. In the oscillatory stage of motion the torque is comprised of an angular-velocity-dependent form-torque and an acceleration-dependent inertial torque. These torque components are interdependent as well as time-dependent. The rotation of the plate in a steady uniform flow gives rise to a hinge moment which is considerably larger than that of a plate held fixed at the same instantaneous angle of incidence. (Author).

A Theoretical and Experimental Study of the Fluid Motion about a Flat Plate Rotated Inpulsively from Rest to a Uniform Angular Velocity

A Theoretical and Experimental Study of the Fluid Motion about a Flat Plate Rotated Inpulsively from Rest to a Uniform Angular Velocity PDF Author: Turgut Sarpkaya
Publisher:
ISBN:
Category :
Languages : en
Pages : 30

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Scientific and Technical Aerospace Reports

Scientific and Technical Aerospace Reports PDF Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1336

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Report

Report PDF Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 260

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Technical Abstract Bulletin

Technical Abstract Bulletin PDF Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 628

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NBS Special Publication

NBS Special Publication PDF Author:
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 844

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Current Hydraulic Laboratory Research in the United States

Current Hydraulic Laboratory Research in the United States PDF Author:
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 260

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Naval Research Reviews

Naval Research Reviews PDF Author:
Publisher:
ISBN:
Category : Naval research
Languages : en
Pages : 480

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Government-wide Index to Federal Research & Development Reports

Government-wide Index to Federal Research & Development Reports PDF Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1234

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Mechanics of Flow-Induced Vibration

Mechanics of Flow-Induced Vibration PDF Author: Rajeev Jaiman
Publisher: Springer Nature
ISBN: 9811985782
Category : Technology & Engineering
Languages : en
Pages : 1028

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Book Description
This book discusses various passive and active techniques for controlling unsteady flow dynamics and associated coupled mechanics of fluid-structure interaction. Coupled multiphysics and multidomain simulations are emerging and challenging research areas, which have received significant attention during the past decade. One of the most common multiphysics and multidomain problems is fluid-structure interaction (FSI), i.e., the study of coupled physical systems involving fluid and a structure that have a mechanical influence on each other. Regardless of the application area, the investigation toward modeling of fluid-structure interaction and the underlying mechanisms in dealing with coupled fluid-structure instability with real-world applications remains a challenge to scientists and engineers. This book is designed for students and researchers who seek knowledge of computational modeling and control strategies for fluid-structure interaction. Specifically, this book provides a comprehensive review of the underlying unsteady physics and coupled mechanical aspects of the fluid-structure interaction of freely vibrating bluff bodies, the self-induced flapping of thin flexible structures, and aeroelasticity of shell structures. Understanding flow-induced loads and vibrations can lead to safer and cost-effective structures, especially for light and high-aspect ratio structures with increased flexibility and harsh environmental conditions. Using the body-fitted and moving mesh formulations, the physical insights associated with structure-to-fluid mass ratios, Reynolds number, nonlinear structural deformation, proximity interference, near-wall contacts, free-surface, and other interacting physical fields are covered in this book. In conjunction with the control techniques, data-driven model reduction approaches based on subspace projection and deep neural calculus are covered for low-dimensional modeling of unsteady fluid-structure interaction.