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Evolution of trailing vortices around a ship hull at large drift angle
Citation Link: https://doi.org/10.15480/882.4045
Publikationstyp
Doctoral Thesis
Date Issued
2021
Sprache
English
Author(s)
Feder, Dag-Frederik
Advisor
Referee
Title Granting Institution
Technische Universität Hamburg
Place of Title Granting Institution
Hamburg
Examination Date
2021-11-30
Institut
TORE-DOI
Citation
Technische Universität Hamburg (2021)
The two major trailing vortices close to the KVLCC2 model at 30° static drift and Re=2.6e6 are investigated within the framework of the present thesis. Numerical flow simulations with a hybrid RANS-LES model, the SST-based IDDES proposed by Gritskevich et al. (2012), were conducted with OpenFOAM. The following vortex characteristics are examined in detail with a focus on the vortex centre: vortex wandering and its interaction with core turbulence, and the axial velocity overshoot. Furthermore, a brief analysis is conducted for vortex interactions and instability phenomena.
Peculiarities of the present vortex flow are compared to established wingtip vortex flows: the vortices are subjected to a significant bending, a portion of TKE stems from wandering, the axial velocity overshoot evolves differently.
Peculiarities of the present vortex flow are compared to established wingtip vortex flows: the vortices are subjected to a significant bending, a portion of TKE stems from wandering, the axial velocity overshoot evolves differently.
Subjects
ship hull
drift
hybrid RANS-LES
trailing vortex
wandering
turbulence
DDC Class
600: Technik
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