In this paper, we propose a technique for high-fidelity fluid–structure interaction (FSI) spatial interface reconstruction of a horizontal axis wind turbine (HAWT) rotor model composed of an elastic blade mounted on a rigid hub. The technique is aimed at enabling re-usage of existing blade finite element method (FEM) models, now with high-fidelity fluid subdomain methods relying on boundary-fitted mesh. The technique is based on the partition of unity (PU) method and it enables fluid subdomain FSI interface mesh of different components to be smoothly connected. In this paper, we use it to connect a beam FEM model to a rigid body, but the proposed technique is by no means restricted to any specific choice of numerical models for the structure components or methods of their surface recoveries. To stress-test robustness of the connection technique, we recover elastic blade surface from collinear mesh and remark on repercussions of such a choice. For the HAWT blade recovery method itself, we use generalized Hermite radial basis function interpolation (GHRBFI) which utilizes the interpolation of small rotations in addition to displacement data. Finally, for the composed structure we discuss consistent and conservative approaches to FSI spatial interface formulations.
Composed Fluid–Structure Interaction Interface for Horizontal Axis Wind Turbine Rotor
Department of Aeronautical Engineering,
Faculty of Mechanical Engineering
and Naval Architecture,
Contributed by the Design Engineering Division of ASME for publication in the JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS. Manuscript received February 14, 2014; final manuscript received February 4, 2015; published online April 2, 2015. Assoc. Editor: Carlo L. Bottasso.
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Matijašević, D., Terze, Z., and Vrdoljak, M. (July 1, 2015). "Composed Fluid–Structure Interaction Interface for Horizontal Axis Wind Turbine Rotor." ASME. J. Comput. Nonlinear Dynam. July 2015; 10(4): 041009. https://doi.org/10.1115/1.4029749
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