Numerical study of reduction of unsteady effects in bow thruster

The article presents a numerical study of the effectiveness of reducing pressure and thrust pulsations in the bow thruster due to two technical measures: rounding the entrance to the tunnel and using a protection grille of a new design. The study involved the methods of turbulence modeling RANS and...

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Veröffentlicht in:Ocean engineering Jg. 324; S. 120660
Hauptverfasser: Kazemi, M., Dause, M., Hinnenthal, J., Kornev, N.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Elsevier Ltd 30.04.2025
Schlagworte:
Bow thruster
Cavitation
Hybrid method
LES
Objective genetic optimization algorithm
Unsteady effects
URANS
Hybrid method
Objective genetic optimization algorithm
LES
Bow thruster
URANS
Cavitation
Unsteady effects
ISSN:0029-8018
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Zusammenfassung:The article presents a numerical study of the effectiveness of reducing pressure and thrust pulsations in the bow thruster due to two technical measures: rounding the entrance to the tunnel and using a protection grille of a new design. The study involved the methods of turbulence modeling RANS and hybrid RANS/LES, as well as the Objective Genetic Optimization Algorithm. A significant decrease in the separation zone at the tunnel entrance, a decrease in the volume of the cavity and, associated with these two processes, a significant decrease in pressure and thrust pulsations have been documented. This indicates the possibility of a significant reduction in acoustic emission and vibration due to the passive flow control methods proposed. •High-fidelity CFD simulations using hybrid methods.•Optimization of bow thruster grille and entrance.•Substantial reduction of thrust fluctuations and pressure pulsations.
ISSN:0029-8018
DOI:10.1016/j.oceaneng.2025.120660