| Abstrakt: |
The present study highlights the significance of optimizing ship designs to address real-world challenges in the maritime environment. This could improve the ships’ hydrodynamic performance, which is crucial for enhancing operational effectiveness and fuel efficiency. To achieve this goal, the Korean Very Large Crude Carrier (KVLCC2) model is modified to incorporate a bow wave-foil with the NACA0015 profile, with swept angles ranging from 0° to 24° in 6° increments. In this study, numerical simulations using the Boundary Element Method (BEM) are used to evaluate 2D drift motions, including heave and pitch, and predict the wave-added resistance coefficient. The solver results are validated using existing experimental data from the original KVLCC2 model, assessing its accuracy for regular waveforms, 2D drift, and the Response Amplitude Operators (RAOs) of the added resistance coefficient. Following this, regular head waves with variable Froude numbers of 0.0, 0.142, and 0.3 are applied to both the original KVLCC2 model and its modified version. Furthermore, the wavelength to model’s length ratio is also systematically changed from 0.4 to 2.0. In conclusion, the KVLCC2 model with a 6° swept angle proves to be the most favorable choice among all the examined models, demonstrating significant advantages in terms of 2D drift RAOs and the added resistance coefficient. Lastly, when compared to the original model, this modification results in a significant reduction of approximately 2.59% in RAOs-heave, 2.19% in RAOs-pitch, and 4.34% in the added resistance coefficient. |
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