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Estimation of three-dimensional aerodynamic damping using CFD

Published online by Cambridge University Press:  12 November 2019

R.J. Higgins Open the ORCID record for R.J. Higgins [Opens in a new window] ,
G.N. Barakos Open the ORCID record for G.N. Barakos [Opens in a new window]  and
E. Jinks
R.J. Higgins
Affiliation:
University of Glasgow, Glasgow, U.K.
G.N. Barakos*
Affiliation:
University of Glasgow, Glasgow, U.K.
E. Jinks
Affiliation:
Dowty Propellers, Anson Business Park, Gloucester, U.K.
*
[email protected]
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Abstract

Aeroelastic phenomena of stall flutter are the result of the negative aerodynamic damping associated with separated flow. From this basis, an investigation has been conducted to estimate the aerodynamic damping from a time-marching aeroelastic computation. An initial investigation is conducted on the NACA 0012 aerofoil section, before transition to 3D propellers and full aeroelastic calculations. Estimates of aerodynamic damping are presented, with a comparison made between URANS and SAS. Use of a suitable turbulence closure to allow for shedding of flow structures during stall is seen as critical in predicting negative damping estimations. From this investigation, it has been found that the SAS method is able to capture this for both the aerofoil and 3D test cases.

Keywords

Flutterdampingmoment loopaeroelasticity
Type
Research Article
Information
The Aeronautical Journal , Volume 124 , Issue 1271 , January 2020 , pp. 24 - 43
Copyright
© Royal Aeronautical Society 2019 

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