Abstract
Turbulent air wake of a Simplified Frigate Ship (SFS2) model is simulated using wall-resolved Large Eddy Simulation. The wake behind the superstructure presents an asymmetric configuration for an otherwise symmetric free stream condition. Bi-stable characteristics of the wake have also been simulated as evidenced by asymmetric state switching events. The wake behind the stern also exhibits bi-stable switching and adapts an opposite asymmetric orientation to the wake behind the superstructure, as also observed experimentally. The resulting time-averaged flow fields for each bi-stable state reveal a differential flux formation around the upstream sides of the superstructure. The instantaneous wake fields also suggest a possible influence of flow structures developed around the upstream end of the superstructure to generate a particular asymmetric wake state downstream.
Original language | British English |
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Article number | 109233 |
Journal | International Journal of Heat and Fluid Flow |
Volume | 104 |
DOIs | |
State | Published - Dec 2023 |
Keywords
- Bi-stable air wake
- Frigate
- LES
- SFS2
- Wake asymmetry