Investigations of Helicopter Wake Flow Including Rotor-Head Motion

Stuhlpfarrer, M.; Kümmel, Andreas; Breitsamter, Christian

doi:10.2514/1.c034689

Cited by 4 publications

(1 citation statement)

References 19 publications

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“…Chan conducted overset grid quality diagnostics, 20 and Quon used radial basis functions (RBFs) to avoid the influence of orphan points on the simulation 21 . Studies on overset applications have focused on the automatic generation of grids for complex structural surfaces 22 , active flow control, 23 rotor hub, 24 wind farm simulation 25 , and the fluid structure coupling problem 26 . In addition, grid‐preprocessing software such as Pointwise, commercial solvers such as Starccm+ and Fluent, and postprocessing software such as Tecplot all currently support overset grids.…”

Section: Introductionmentioning

confidence: 99%

A robust overset assembly method for multiple overlapping bodies

Shi

2020

Numerical Methods in Fluids

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Summary A robust overset assembly method allowing for multiple overlapping bodies is presented. This method extends the overset assembly method to deal with the interference between objects and prevents the failure of the search for donor cells due to the complex shape of the models. The donor cells are searched before identifying the boundary of the chimera interpolation. By selecting interpolation cells only in areas with donor cells, the final overset interpolation boundary cells can always find their donor cells, which prevents orphan points and achieves excellent robustness. First, the implementation of the proposed assembly method is described in detail. Subsequently, the usability and efficiency of the method are verified using several cases. Finally, the integration strategy of the computational fluid dynamics solver based on overset interpolation with the modification of the boundary type is described and verified using practical cases with overlapping bodies. The results demonstrate the applicability of the proposed overset grid assembly method.

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