The effects of hull form on the hydrodynamic performance of launch

Several thousand traditional Iranian dhows navigate the Persian Gulf and Oman Sea and play an important role in the livelihood of hundreds of thousands of people in this coastal area.The construction of these traditional vessels is more based on experience and unlike modern commercial vessels, advanced engineering calculations, complex computer modeling, and laboratory tests are not used in their design; Therefore, optimizing and reducing their fuel consumption is important, and if it is possible to increase the efficiency of these types of vessels, it is a big step towards increasing their efficiency.In this research, the optimal body form with the least hydrodynamic resistance was determined by considering the sample dhow body form and presenting several modified body forms, with numerical modeling in STAR CCM+ software.The results show that the resistance of the vessel is reduced by 10% by modifying the aft body, and this value reaches 20% by modifying the shape of the bow.Thus, by modifying the vessel aft, fuel consumption is reduced by 13%, and by applying the modification of the vessel bow, this value reaches about 30%.