Model structure effect on static aeroelastic deformation of the NASA CRM

• Published in: International journal of numerical methods for heat & fluid flow Vol. 30; no. 9; pp. 4167 - 4183
• Main Authors: Bdeiwi, Houda, Ciarella, Andrea, Peace, Andrew, Hahn, Marco
• Format: Journal Article
• Language: English
• Published: Bradford Emerald Publishing Limited 21.08.2020; Emerald Group Publishing Limited
• Subjects: Accuracy; Aerodynamics; Aeroelasticity; Aeronautics; Aircraft; Angle of attack; Computational fluid dynamics; Computer simulation; Deformation; Deformation effects; Finite element method; Fluid dynamics; Fluid-structure interaction; Hydrodynamics; Investigations; Mathematical models; Methodology; Methods; Reynolds number; Simulation; Structural models; Turbulence models; Wind effects; Wind tunnel models; Wind tunnels; Fluid-structure interactions; Aerodynamic loads
• ISSN: 0961-5539; 1758-6585
• DOI: 10.1108/HFF-07-2018-0352

Purpose This paper aims to present a computational aeroelastic capability based on a fluid–structure interaction (FSI) methodology and validate it using the NASA Common Research Model (CRM). Focus is placed on the effect of the wind tunnel model structural features on the static aeroelastic deformations. Design/methodology/approach The FSI methodology couples high-fidelity computational fluid dynamics to a simplified beam representation of the finite element model. Beam models of the detailed CRM wind tunnel model and a simplified CRM model are generated. The correlation between the numerical simulations and wind tunnel data for varying angles of attack is analysed and the influence of the model structure on the static aeroelastic deformation and aerodynamics is studied. Findings The FSI results follow closely the general trend of the experimental data, showing the importance of considering structural model deformations in the aerodynamic simulations. A thorough examination of the results reveals that it is not unequivocal that the fine details of the structural model are important in the aeroelastic predictions. Research limitations/implications The influence of some changes in structural deformation on transonic wing aerodynamics appears to be complex and non-linear in nature and should be subject to further investigations. Originality/value It is shown that the use of a beam model in the FSI approach provides a reliable alternative to the more costly coupling with the full FE model. It also highlights the non-necessity to develop precise, detailed structural models for accurate FSI simulations.