An Isogeometric Boundary Element Method for 3D lifting flows using T-splines
| Autor: | S.P. Chouliaras, K.V. Kostas, C. G. Politis, A. I. Ginnis, Panagiotis Kaklis |
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| Rok vydání: | 2021 |
| Předmět: |
VM
Mechanical Engineering Mathematical analysis Kutta condition Computational Mechanics General Physics and Astronomy Perturbation (astronomy) Basis function 010103 numerical & computational mathematics Isogeometric analysis 01 natural sciences Mathematics::Numerical Analysis Computer Science Applications 010101 applied mathematics Singularity Mechanics of Materials Trailing edge 0101 mathematics Panel method Boundary element method Mathematics |
| Zdroj: | Computer Methods in Applied Mechanics and Engineering. 373:113556 |
| ISSN: | 0045-7825 |
| DOI: | 10.1016/j.cma.2020.113556 |
| Popis: | In this paper an Isogeometric Boundary Element Method for three-dimensional lifting flows based on Morino’s (Morino and Kuo, 1974) formulation is presented. Analysis-suitable T-splines are used for the representation of all boundary surfaces and the unknown perturbation potential is approximated by the same T-spline basis used for the geometry. A novel numerical application of the so-called Kutta condition is introduced that utilises the advantages of isogeometric analysis with regard to the smoothness of the trailing edge curve basis functions. The method shows good agreement with existing experimental results and superior behaviour when compared to a low order panel method. The effect of the tip singularity on Kutta condition is also investigated for different levels of refinement and positions of the trailing edge collocation points. |
| Databáze: | OpenAIRE |
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