Time Domain Aeroelastic Analysis of a Two Airfoil system with Application to Unsteady Rotary Wing Flow Fields
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Authors
Jones, K.D.
Platzer, M.F.
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Date of Issue
1995
Date
1995
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Abstract
In this paper a time-domain aeroelastic analysis code is described for single airfoils and two-foil systems in incompressible, inviscid flow. Flow solutions are obtained using a time-stepping panel code, and airfoil motions are computed using a two-degree-of-freedom (TDOF) spring/mass model. The time-stepping aeroelastic code is evaluated through comparisons with several classical frequency-domain studies for both single-degree-of-freedom (SDOF) and TDOF motions. SDOF results show excellent agreement with past studies and, furthermore, provide a look into the evolution of the motion in time. Additionally, using a two-foil system, it is shown that flutter of a trailing airfoil can be controlled by proper oscillation and phasing of a leading airfoil. TDOF results highlight a step-size dependence of the panel code, but again demonstrate the active flutter control by means of an oscillating leading airfoil. A method for simulating unsteady rotary wing flowfields with the two-foil aeroelastic code is described, and comparisons with past frequency-domain studies show good agreement.
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Conference Paper
Description
AIAA Paper No. 95-0337, 33rd AIAA Aerospace Sciences Meeting, Reno, Nevada, Jan. 1995.
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Department of Mechanical and Aerospace Engineering
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Citation
Jones, K.D. and Platzer, M.F., "Time Domain Flutter Analysis of a Two Airfoil system with Application to Unsteady Rotary Wing Flow Fields," AIAA Paper No. 95-0337, 33rd AIAA Aerospace Sciences Meeting, Reno, Nevada, Jan. 1995.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.