Nonintrusive experimental aeroelastic analysis of a highly flexible wing

Christoph Mertens*, José L.Costa Fernández, Jurij Sodja, Andrea Sciacchitano, Bas W. Van Oudheusden

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
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The aeroelastic response of the Delft-Pazy wing to steady and periodic unsteady inflow conditions is analyzed experimentally. The Delft-Pazy wing is a highly flexible wing model based on the benchmark Pazy wing (Avin, O., Raveh, D. E., Drachinsky, A., Ben-Shmuel, Y., and Tur, M., “Experimental Aeroelastic Benchmark of a Very Flexible Wing,” AIAA Journal, Vol. 60, No. 3, 2022, pp. 1745-1768) and exhibits wingtip displacements of more than 24% of the span in the present study. The nonintrusive measurements are performed with an integrated optical approach that provides combined measurements of the structural response of the wing and the unsteady flowfield around it. The aeroelastic loads acting on the wing are derived using physical models and validated against force balance measurements, showing a good agreement for all considered inflow conditions. The analysis of the aeroelastic response of the wing to the unsteady inflow produced by a gust generator shows that both structural and aerodynamic responses depend strongly on the frequency of the gust. The results of this study provide a characterization of the aeroelastic behavior of the Delft-Pazy wing and can serve as a reference for the development of novel and improved nonlinear aeroelastic simulation models.

Original languageEnglish
Pages (from-to)3062-3077
Number of pages16
JournalAIAA Journal
Issue number7
Publication statusPublished - 2023


This work has been carried out in the context of the Holistic Optical Metrology for Aero-Elastic Research project that has received funding from the European Union’s Horizon 2020 Research and Innovation Programme under Grant Agreement No. 769237. The authors appreciate the contributions of Ariel Drachinsky and Daniella E. Raveh from Technion—Israel Institute of Technology to this work by providing the geometry of the Pazy wing and by offering advice for the construction of the Delft–Pazy wing. Furthermore, the authors gratefully acknowledge the assistance of Adrián Grille Guerra during the wind-tunnel experiment.


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