Form optimization of the black sea type fishing vessels

In the study, a dimensionless offset table was developed to optimize "Black Sea Type Fishing Vessel" (KTBG) forms and standardize their production. A dimensionless offset table was created to produce standard KTBG forms with a length of 40-60 meters, a depth of 4.0-5.5 meters, and an L/B ratio of 2.5-3.5 based on Black Sea type fishing vessels. Formulas were created to calculate form weights and volumes. KTBG forms' resistance values were calculated using StarCCM+ CFD software. The dimensionless offset table forms and existing fishing vessels were compared for resistance. Using the KTBG standard dimensionless offset table, 68 forms in the range of 40-60 meters were created and analyzed for resistance. Resistance rankings were made based on fish transport volume, and speed values were found based on main engine power. The effect of loading condition, stern, and bow trim on resistance was investigated. The effect of keel and bilge layouts on resistance was investigated. With-bulb and without-bulb forms were compared for resistance. In the dimensionless offset table, the bulb shape and the X-Bow shape bow's resistance are compared. Delta, nabla, and elliptical bulbs were tested to see how bulb shape affected resistance. Double and triple skeg structures in Black Sea-type fishing vessels were analyzed for resistance, and the best skeg position was 4 meters from the central keel. CFD calculations show that KTBG standard dimensionless offset table forms have better resistance.