At Nodosa Shipyard, the design, construction, and repair of fishing vessels—both for high seas and coastal operations—are among their core capabilities. They have a proven track record of delivering various types of fishing vessels, including tuna boats, longliners, and trawlers.
For the Longliner Newbuild 282 project, Nodosa Shipyard selected VICUSdt for comprehensive hydrodynamic analysis and the design of both the propeller and rudder. VICUSdt’s expertise played a critical role in optimizing the vessel’s performance, starting with an in-depth study of the preliminary hull using advanced Computational Fluid Dynamics (CFD) tools. The analysis was conducted under two loading conditions at three different speeds, providing an accurate prediction of powering requirements. This allowed the team to verify that the selected engine would meet the vessel’s target speed with the existing hull form.
Following the results of this initial study, we implemented hull optimization to reduce resistance and brake power without sacrificing speed. A key modification to the bulbous bow led to significant resistance reduction, eliminating the need to upgrade the engine or adjust maximum speed requirements.
Additionally, to enhance wake flow, the aft bulb was redesigned, resulting in a more uniform wake field and improved propeller-hull interaction. Streamline-based adjustments were also recommended, such as alignment of appendages to further optimize hydrodynamic performance.
The longliner will be equipped with a custom-designed 5-blade, 2.7m fixed-pitch propeller, tailored through “in-behind” self-propulsion analysis. This ensures maximum efficiency by adapting the propeller to the wake flow and minimizing noise and vibration, while meeting all speed, noise, and efficiency specifications.
The rudder, designed using optimization techniques combined with potential and viscous CFD codes, will feature a twisted profile with a bulb. This advanced rudder design ensures optimal flow and performance across all sections, enhancing maneuverability and further reducing drag.
By collaborating closely with Nodosa Shipyard, VICUSdt has delivered state-of-the-art hydrodynamic solutions, ensuring the Longliner 282 will operate efficiently, reliably, and in full compliance with performance requirements.
