Reduced-Order Modeling of Three-Dimensional External Aerodynamic Flows
Publication: Journal of Aerospace Engineering
Volume 25, Issue 4
Abstract
A method is presented to construct computationally efficient reduced-order models (ROMs) of three-dimensional aerodynamic flows around commercial aircraft components. The method is based on the proper orthogonal decomposition (POD) of a set of steady snapshots, which are calculated using an industrial solver based on some Reynolds averaged Navier-Stokes (RANS) equations. The POD-mode amplitudes are calculated by minimizing a residual defined from the Euler equations, even though the snapshots themselves are calculated from viscous equations. This makes the ROM independent of the peculiarities of the solver used to calculate the snapshots. Also, both the POD modes and the residual are calculated using points in the computational mesh that are concentrated in a close vicinity of the aircraft, which constitute a much smaller number than the total number of mesh points. Despite these simplifications, the method provides quite good approximations of the flow variables distributions in the whole computational domain, including the boundary layer attached to the aircraft surface and the wake. Thus, the method is both robust and computationally efficient, which is checked considering the aerodynamic flow around a horizontal tail plane, in the transonic range , .
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Acknowledgments
This research has been partially supported by Airbus Operations under Contract No. A8208636G. The work by José M. Vega has also been supported by the Spanish Ministry of Education, under Grant No. TRA2010-18054. We are indebted to two anonymous referees for some useful comments on an previous version of the paper.
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Information
Published In
Journal of Aerospace Engineering
Volume 25 • Issue 4 • October 2012
Pages: 588 - 599
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Dec 13, 2010
Accepted: Jun 24, 2011
Published online: Jun 27, 2011
Published in print: Oct 1, 2012
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