Assessment of the Fluid-Structure Interaction Capabilities for Aeronautical Applications of the Open-Source Solver Su2.

Abstract

Abstract. We report on an international effort to develop an open-source computational environment for high-fidelity fluid-structure interaction analysis. In particular, we will focus on verification of the implementation for application in computational aeroelasticity. The capabilities of the SU2 code for aeroelastic analysis have been further enhanced both by developing natively embedded tools for the study of largely deformable solids, and by wrapping it using Python tools for an improved communication with external solvers. Both capabilities will be demonstrated on relevant test cases, including rigid-airfoil solutions with indicial functions, the Isogai Wing Section, test cases from the AIAA 2nd Aeroelastic Prediction Workshop, and the vortex-induced vibrations of a flexible cantilever in the wake of a square cylinder. Results show very good performance both in terms of accuracy and computational efficiency. The modularity and versatility of the baseline suite allows for a flexible framework for multidisciplinary computational analysis. The software libraries have been freely shared with the community to encourage further engagement in the improvement, validation and further development of this open-source project.

Physics-Based Low-Order Model for Transonic Flutter Prediction

“…In-vacuo pitch natural frequency We validate the accuracy of the model using the standard Isogai case A. 20,53 We compare our results for the flutter boundary against four methods from the literature [54][55][56][57] and against the flutter boundary found using SU2 (using the same mesh as was used to calibrate the model). We see that the agreement for the transonic flow regime is quite good up to M ∞ = 0.9.…”

“…Flutter speed versus x cg /c positions for different freestream Mach numbers.IV.B. Validation -Isogai Case A Comparison of transonic flutter boundary for Isogai Case A20,53 as found by our method and methods from literature [54][55][56][57]. M crit = 0.762 for this case.…”

Accuracy assessment of the Non-Ideal Computational Fluid Dynamics model for siloxane MDM from the open-source SU2 suite

“…generalized to deal with non-ideal, fully turbulent, flows and it now embodies the reference among NICFD solvers. In the limited framework of ideal flows of air, the reliability of the SU2 suite was already extensively assessed in earlier works, see for instance [3][4][5][6][7]. Preliminary verification of the SU2 NICFD solver implementation can be found in [8][9][10].…”

Coupled adjoint‐based sensitivities in large‐displacement fluid‐structure interaction using algorithmic differentiation

“…The implementation has been done in the partitioned, strongly coupled FSI solver available in the open-source SU2 software suite. 37,38 SU2 consists of a set of C++ libraries developed from the ground up for the solution of complex, multiphysics partial differential equation-based problems [39][40][41] and has already shown its viability for aerodynamic shape design in industrial-scale applications, including full aircraft configurations and wind turbine blades. 41 The software is supported by an international consortium * that seeks collaborative work in the solution of complex, multidisciplinary problems.…”

“…We employ Expression Templates [36] in order to avoid the large computational cost and memory requirements that result from the application of the most common AD techniques (operator overloading and source code transformation). The implementation has been done in the partitioned, strongly-coupled FSI solver available in the open-source SU2 software suite [37,38]. SU2 consists of a set of C++ libraries developed from the ground up for the solution of complex, multiphysics Partial Differential Equation-based problems [39][40][41] and has already shown its viability for aerodynamic shape design in industrial-scale applications, including full aircraft configurations and wind turbine blades [41].…”