Prediction and analysis of wing flutter at transonic speeds.

This dissertation deals with the instability, known as flutter, of the lifting and control surfaces of aircraft of advanced design at high altitudes and speeds. A simple model is used to represent the aerodynamics for flutter analysis of a two-degree-of-freedom airfoil system. Flutter solutions of this airfoil system are shown to be algebraically homomorphic in that solutions about different elastic axes can be found by mapping them to those about the mid-chord. Algebraic expressions for the flutter speed and frequency are thus obtained. For the prediction of flutter of a wing at transonic speeds, an accurate and efficient computer code is developed. The unique features of this code are the capability of accepting a steady mean flow regardless of its origin, a time dependent perturbation boundary condition for describing wing deformations on the mean surface, and a locally applied three-dimensional far-field boundary condition for minimizing wave reflections from numerical boundaries. Results for various test cases obtained using this code show good agreement with the experiments and other theories.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

doctoral

Discipline thesis:degree_discipline

Aerospace and Mechanical Engineering

Grantor dc:publisher

The University of Arizona.

Year dc:date.issued

1991

Author dc:creator

• Shieh, Teng-Hua.

Advisor dc:contributor.advisor

• Fung, K.-Y.

Committee members dc:contributor.committeemember

• Fasel, Hermann
• Balsa, Thomas F.
• Brio, Moysey

• Flutter (Aerodynamics)
• Oscillating wings (Aerodynamics)
• Aerodynamics
• Transonic
• Aerofoils.

Statement dc:rights

• Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.

Language dc:language.iso

en

Handle dc:identifier.uri

http://hdl.handle.net/10150/185694

OAI identifier oai:identifier

oai:repository.arizona.edu:10150/185694