Analisa Jarak Bebas Nozzle (Ducted) Terhadap Gaya Dorong (Thrust), Torsi (Torque) dan Efisiensi Pada Kapal Ikan Tradisional Menggunakan CFD

Abstrak

Traditional fishing boats play an important role in fisheries activities in Indonesia, but are often not designed with standardized technical calculations, including the propulsion system. One of the main components in the propulsion system is the propeller, which can be improved with the use of a nozzle. This study aims to analyze the effect of nozzle clearance variation on the propeller's hydrodynamic performance, including thrust, torque, and propulsion efficiency. The analysis was performed numerically using Computational Fluid Dynamics (CFD) software with the RANS k-ω SST turbulence model. Based on the results obtained, the highest thrust value occurred at 0.5% nozzle clearance with 298.47 kN, while thrust decreased dramatically at 2% clearance with 61.58 kN. On the other hand, the highest torque value occurred at a distance of 1.5% with 575,141 kN, but at this condition the thrust generated was lower than at a smaller nozzle clearance. This study concludes that nozzle clearance plays an important role in improving the efficiency of traditional fishing boat propulsion systems and recommends further research related to flow velocity variations and potential cavitation. Kata kunci: CFD, ducted, propeller, thrust, torque.

Kata kunci

• CFD
• Propeller
• Thrust
• Torque
• ducted