Title: Aeroelastic predictions for steady and unsteady flow characteristics of the HIRENASD wing

Authors: Melike Nikbay; Pınar Acar

Addresses: Department of Astronautical Engineering, Faculty of Aeronautics and Astronautics, Istanbul Technical University, Maslak, Istanbul, 34469, Turkey ' Department of Astronautical Engineering, Faculty of Aeronautics and Astronautics, Istanbul Technical University, Maslak, Istanbul, 34469, Turkey

Abstract: In this study, we focus on static and dynamic aeroelastic analyses of the HIRENASD wing based on reference experimental data for two different flight conditions for Aeroelastic Prediction Workshop-1. The major anticipations from the HIRENASD project are to improve the knowledge about aero-structural dynamics, and to get experimental and computational data in a wide range of flight conditions. The experiments have been formerly conducted in cryogenic medium to investigate steady and unsteady aeroelastic responses in transonic regime for low and high Reynolds numbers. For current aeroelastic computations, first, a free vibration analysis is performed in Nastran using the latest structural model provided by NASA. Sequentially, the modal solution is imported from the finite element solver to Zeus software which is an Euler equations based aeroelastic solver coupled with integral boundary layer method. The aerodynamic model and fluid structure interaction parameters are constructed in Zeus. Steady and unsteady aeroelastic results are examined for the specified stations along the wing span, and interpolated for chordwise direction so as to match them with the wind tunnel test points. The designated output parameters such as steady aerodynamic lift, moment and drag coefficients, and steady and unsteady pressure distributions along the chordwise direction are compared to the experimental data and NASA's FUN3D code results which are provided in literature.

Keywords: aeroelasticity; HIRENASD wing; aeroelastic prediction; unsteady flow; fluid-structure interaction; wind tunnel testing; CFD; computational fluid dynamics; modal analysis; Euler equations; flight conditions; aero-structural dynamics; free vibration analysis; aerodynamic modelling; aerodynamic lift; moment coefficient; drag coefficient; pressure distribution.

DOI: 10.1504/PCFD.2016.074253

Progress in Computational Fluid Dynamics, An International Journal, 2016 Vol.16 No.1, pp.26 - 37

Received: 08 May 2021
Accepted: 12 May 2021

Published online: 18 Jan 2016 *

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