High Performance Computations of Rotorcraft Aerodynamics with the Flow Solver FLOWer

Constantin Öhrle (), Johannes Letzgus (), Manuel Keßler () and Ewald Krämer ()
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Constantin Öhrle: University of Stuttgart, Institute of Aerodynamics and Gas Dynamics (IAG)
Johannes Letzgus: University of Stuttgart, Institute of Aerodynamics and Gas Dynamics (IAG)
Manuel Keßler: University of Stuttgart, Institute of Aerodynamics and Gas Dynamics (IAG)
Ewald Krämer: University of Stuttgart, Institute of Aerodynamics and Gas Dynamics (IAG)

A chapter in High Performance Computing in Science and Engineering '19, 2021, pp 451-462 from Springer

Abstract: Abstract Recent enhancements and applications of the flow solver FLOWer are presented. First, an Adaptive Mesh Refinement technique (AMR) is implemented and an AMR cycle is built around FLOWer. Depending on the application case, the usage of AMR significantly reduces the overall computational cost—and thus increases efficiency—of the flow solution. Exemplary, for a complete helicopter simulation a reduction in computational time of 45% is achieved without any observable loss of accuracy. Second, the implementation of a new shielding approach for detached eddy simulations is shown. This applies a sophisticated communication method to exchange flow variables in wall normal direction. As an application case, the computation of the highly resolved rotor wake in hover highlights the possibilities of high performance computing in combination with advanced numerical methods for rotorcraft flows.

Date: 2021
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DOI: 10.1007/978-3-030-66792-4_30

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