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Simulation of Fluttering and Autorotation Motion of Vertically Hinged Flat Plate

Lookup NU author(s): Dr Ali Bakhshandehrostami

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Abstract

This paper is dedicated to the simulation of fluttering (oscillatory) and tumbling (rotational) phenomenon that may occur during the flow induced rotation in the water or air current. Fluttering is the oscillation of body about an axis and the tumbling, better called here as autorotation, is a name given to the case when the body turns continuously around the axis. This work describes the simulation of these phenomena by a nonlinear time domain code on freely rotating plate about a fixed vertical axis. The dimensional analysis proves that the rotational motion induced by flow is governed essentially by the dimensionless moment of inertia (I*) and Reynolds number. For Reynolds number less than 15000, plate experiences small amplitude fluttering motion that is independent of I*. It is shown that by increasing I* the fluttering bifurcates to autorotation, with a transition point that is approximately independent of Reynolds number and is such that I*=0.083.


Publication metadata

Author(s): Bakhshandehrostami A, Fernandes AC

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2015)

Year of Conference: 2015

Number of Volumes: OMAE2015-41244

Online publication date: 01/10/2015

Acceptance date: 30/01/2015

Date deposited: 12/07/2018

ISSN: 9780791856475

Publisher: The American Society of Mechanical Engineering (ASME)

URL: https://doi.org/10.1115/OMAE2015-41244

DOI: 10.1115/OMAE2015-41244

Sponsor(s): Ocean, Offshore and Arctic Engineering Division


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