Updating of Aerodynamic Reduced Order Models Generated using Computational Fluid Dynamics
LM Griffiths, AL Gaitonde, DP Jones (Bristol University) & MI Friswell (Swansea University)
Journal of Aerospace Engineering, IMechE Proceedings Part G, Vol. 232, No. 9, July 2018, pp. 1739-1763
Reduced order models of computational fluid dynamics codes have been developed to decrease computational costs; however, each reduced order model has a limited range of validity based on the data used in its construction. Further, like the computational fluid dynamics from which it is derived, such models exhibit differences from experimental data due to uncertainty in boundary conditions and numerical accuracy. Model updating provides the opportunity to use small amounts of additional data to modify the behaviour of a reduced order model, which means that the range of validity of the reduced order model can be extended. Whilst here computational fluid dynamics data have been used for updating, the approach offers the possibility that experimental data can be used in future. In this work, the baseline reduced order models are constructed using the Eigensystem realisation algorithm and the steps used to update these models are given in detail. The methods developed are then applied to remove the effects of wind tunnel walls and to include viscous effects.
This material has been published in the Journal of Aerospace Engineering, IMechE Proceedings Part G, Vol. 232, No. 9, July 2018, pp. 1739-1763, the only definitive repository of the content that has been certified and accepted after peer review. Copyright and all rights therein are retained by the Sage.
Link to paper using doi: 10.1177/0954410017716698
Journal of Aerospace Engineering, IMechE Proceedings Part G