Abstract
The influence of atmospheric turbulence on an extruded airfoil of the FNG wing in clean configuration is investigated using numerical simulation. Turbulence is injected into the flow field using a momentum source term. It is shown that the turbulence can be propagated accurately to the airfoil. Spectra of the pressure coefficient at different chordwise positions indicate a correlation between the inflow velocity spectrum and the local \(c_p\) spectra, especially for low to medium wave numbers. Furthermore, the applicability of the simplified Disturbance Velocity Approach (DVA) is evaluated, where the velocities of the atmospheric turbulence are added to the flux balance using superposition. The DVA shows satisfying results for the lift spectrum and the \(c_p\) spectrum at the leading edge over a broad wave number range. An overestimation of the amplitudes for the pitching moment and \(c_p\) spectra at \(x/c=0.2\) occurs at medium to high wave numbers. A scaling test of the TAU code in a development version with the implemented DVA is performed on this test case and shows satisfying scalability.
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Acknowledgements
The authors gratefully acknowledge the Federal Ministry for Economic Affairs and Energy, which funded the work presented in this report as part of the LuFo project VitAM-Turbulence. Also, we acknowledge the High Performance Computing Center Stuttgart (HLRS) for the provision of computational resources and the continued support.
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Müller, J., Ehrle, M., Lutz, T., Krämer, E. (2021). Numerical Simulation of the FNG Wing Section in Turbulent Inflow. In: Nagel, W.E., Kröner, D.H., Resch, M.M. (eds) High Performance Computing in Science and Engineering '19. Springer, Cham. https://doi.org/10.1007/978-3-030-66792-4_29
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DOI: https://doi.org/10.1007/978-3-030-66792-4_29
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