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2D and 3D low frequency aerodynamics

Published online by Cambridge University Press:  03 February 2016

L. H. van Zyl
L. H. van Zyl*
Affiliation:
CSIR Pretoria, South Africa
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Abstract

Unsteady aerodynamic loads on aircraft configurations are used for aeroelastic or flight dynamic analyses. The sources for deriving these loads include strip theory aerodynamics and three-dimensional panel methods. In some applications the behaviour of the unsteady air loads as the frequency approaches zero is important, and it is well known that the behaviour of strip theory aerodynamics employing the exact circulation function differs qualitatively from that of the three-dimensional panel methods such as the subsonic doublet lattice method (DLM). Theoretical results from an earlier study of the low frequency behaviour of the DLM are used here to show the relationship between the DLM and strip theory and the relationship is verified by a numerical example.

Type
Research Article
Information
The Aeronautical Journal , Volume 112 , Issue 1136 , October 2008 , pp. 609 - 612
Copyright
Copyright © Royal Aeronautical Society 2008 

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